mirror of https://github.com/fail2ban/fail2ban
[svn-inject] Installing original source of fail2ban
Yaroslav Halchenko
commit
28cca31e3f
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__ _ _ ___ _
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/ _|__ _(_) |_ ) |__ __ _ _ _
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| _/ _` | | |/ /| '_ \/ _` | ' \
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|_| \__,_|_|_/___|_.__/\__,_|_||_|
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=============================================================
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Fail2Ban (version 0.4.1) 06/30/2005
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=============================================================
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ver. 0.4.1 (06/30/2005) - stable
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----------
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- Fixed textToDNS method which generated wrong matches for
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"rhost=12-xyz...". Thanks to Tom Pike
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- fail2ban.conf modified for readability. Thanks to Iain Lea
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- Added an initd script for Gentoo
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- Changed default PID lock file location from /tmp to
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/var/run
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ver. 0.4.0 (04/24/2005) - stable
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----------
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- Fixed textToDNS which did not recognize strings like
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"12-345-67-890.abcd.mnopqr.xyz"
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ver. 0.3.1 (03/31/2005) - beta
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----------
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- Corrected level of messages
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- Added DNS lookup support
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- Improved parsing speed. Only parse the new log messages
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- Added a second verbose level (-vv)
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ver. 0.3.0 (02/24/2005) - beta
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----------
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- Re-writting of parts of the code in order to handle several
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log files with different rules
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- Removed sshd.py because it is no more needed
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- Fixed a bug when exiting with IP in the ban list
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- Added PID lock file
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- Improved some parts of the code
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- Added ipfw-start-rule option (thanks to Robert Edeker)
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- Added -k option which kills a currently running Fail2Ban
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ver. 0.1.2 (11/21/2004) - beta
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----------
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- Add ipfw and ipfwadm support. The rules are taken from
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BlockIt. Thanks to Robert Edeker
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- Add -e option which allows to set the interface. Thanks to
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Robert Edeker who reminded me this
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- Small code cleaning
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ver. 0.1.1 (10/23/2004) - beta
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----------
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- Add SIGTERM handler in order to exit nicely when in daemon
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mode
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- Add -r option which allows to set the maximum number of
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login failures
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- Remove the Metalog class as the log file are not so syslog
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daemon specific
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- Rewrite log reader to be service centered. Sshd support
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added. Match "Failed password" and "Illegal user"
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- Add /etc/fail2ban.conf configuration support
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- Code documentation
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ver. 0.1.0 (10/12/2004) - alpha
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----------
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- Initial release
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Metadata-Version: 1.0
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Name: fail2ban
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Version: 0.4.1
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Summary: Ban IPs that make too many password failure
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Home-page: http://www.sourceforge.net/projects/fail2ban
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Author: Cyril Jaquier
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Author-email: lostcontrol@users.sourceforge.net
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License: UNKNOWN
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Description: UNKNOWN
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Platform: UNKNOWN
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__ _ _ ___ _
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/ _|__ _(_) |_ ) |__ __ _ _ _
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| _/ _` | | |/ /| '_ \/ _` | ' \
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|_| \__,_|_|_/___|_.__/\__,_|_||_|
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=============================================================
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Fail2Ban (version 0.4.1) 06/30/2005
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=============================================================
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Fail2Ban scans log files like /var/log/pwdfail and bans IP
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that makes too many password failures. It updates firewall
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rules to reject the IP address. Currently iptables, ipfw and
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ipfwadm are supported. Fail2Ban can read multiple log files
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such as sshd or Apache web server ones. It needs log4py.
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This is my first Python program. Moreover, English is not my
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mother tongue...
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More details:
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-------------
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Fail2Ban is rather simple. I have a home server connected to
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the Internet which runs apache, samba, sshd, ... I see in my
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logs that people are trying to log into my box using "manual"
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brute force or scripts. They try 10, 20 and sometimes more
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user/password (without success anyway). In order to
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discourage these script kiddies, I wanted that sshd refuse
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login from a specific ip after 3 password failures. After
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some Google searches, I found that sshd was not able of that.
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So I search for a script or program that do it. I found
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nothing :-( So I decide to write mine and to learn Python :-)
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For each sections defined in the configuration file, Fail2Ban
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tries to find lines which match the failregex. Then it
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retrieves the message time using timeregex and timepattern.
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It finally gets the ip and if it has already done 3 or more
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password failures in the last banTime, the ip is banned for
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banTime using a firewall rule. After banTime, the rule is
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deleted. Notice that if no "plain" ip is available, Fail2Ban
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try to do DNS lookup in order to found one or several ip's to
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ban.
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Sections can be freely added so it is possible to monitor
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several daemons at the same time.
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Runs on my server and does its job rather well :-) The idea
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is to make fail2ban usable with daemons and services that
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require a login (sshd, telnetd, ...). It should also support
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others firewalls than iptables.
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Installation:
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-------------
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Require: python-2.3 (http://www.python.org)
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log4py-1.1 (http://sourceforge.net/projects/log4py)
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To install, just do:
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> tar xvfj fail2ban-0.4.1.tar.bz2
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> cd fail2ban-0.4.1
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> python setup.py install
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This will install Fail2Ban into /usr/lib/fail2ban. The
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fail2ban.py executable is placed into /usr/bin.
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For Gentoo users, an ebuild is available on the website.
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Fail2Ban should now be correctly installed. Just type:
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> fail2ban.py -h
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to see if everything is alright. You can configure fail2ban
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with a config file. Copy config/fail2ban.conf.default to
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/etc/fail2ban.conf.
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Gentoo users can use the initd script available in config/.
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Copy gentoo-initd to /etc/init.d/fail2ban and gentoo-confd
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to /etc/conf.d/fail2ban. You can start fail2ban and add it
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to your default runlevel:
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> /etc/init.d/fail2ban start
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> rc-update add fail2ban default
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Configuration:
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--------------
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You can configure fail2ban using the file /etc/fail2ban.conf
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or using command line options. Command line options override
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the value stored in fail2ban.conf. Here are the command line
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options:
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-b start fail2ban in background
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-d start fail2ban in debug mode
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-e <INTF> ban IP on the INTF interface
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-c <FILE> read configuration file FILE
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-p <FILE> create PID lock in FILE
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-h display this help message
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-i <IP(s)> IP(s) to ignore
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-k kill a currently running Fail2Ban instance
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-l <FILE> log message in FILE
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-r <VALUE> allow a max of VALUE password failure
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-t <TIME> ban IP for TIME seconds
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-v verbose. Use twice for greater effect
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-w <FIWA> select the firewall to use. Can be iptables,
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ipfwadm or ipfw
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Contact:
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--------
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You need some new features, you found bugs or you just
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appreciate this program, you can contact me at :
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Website: http://www.sourceforge.net/projects/fail2ban
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Cyril Jaquier: <lostcontrol@users.sourceforge.net>
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Thanks:
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-------
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Kévin Drapel, Marvin Rouge, Sireyessire, Robert Edeker,
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Tom Pike, Iain Lea
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License:
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--------
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Fail2Ban is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public
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License as published by the Free Software Foundation; either
|
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version 2 of the License, or (at your option) any later
|
||||
version.
|
||||
|
||||
Fail2Ban is distributed in the hope that it will be
|
||||
useful, but WITHOUT ANY WARRANTY; without even the implied
|
||||
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
||||
PURPOSE. See the GNU General Public License for more
|
||||
details.
|
||||
|
||||
You should have received a copy of the GNU General Public
|
||||
License along with Fail2Ban; if not, write to the Free
|
||||
Software Foundation, Inc., 59 Temple Place, Suite 330,
|
||||
Boston, MA 02111-1307 USA
|
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|
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@ -0,0 +1,15 @@
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__ _ _ ___ _
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/ _|__ _(_) |_ ) |__ __ _ _ _
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| _/ _` | | |/ /| '_ \/ _` | ' \
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|_| \__,_|_|_/___|_.__/\__,_|_||_|
|
||||
|
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=============================================================
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ToDo
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=============================================================
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- cleanup fail2ban.py
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- improve configuration file and command line options
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handling
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- improve installation process
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- add init script
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- use FAM (inotify, gamin, ...)
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# Fail2Ban configuration file
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#
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# $Revision: 1.8 $
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#
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# 2005.06.21 modified for readability Iain Lea iain@bricbrac.de
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[DEFAULT]
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# Option: firewall
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# Notes.: select the firewall system to use.
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# Values: [iptables | ipfwadm | ipfw] Default: iptables
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#
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firewall = iptables
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# Option: ipfw-start-rule
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# Notes.: set first firewall rule number used (only used if firewall = ipfw).
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# Values: NUM Default: 100
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#
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ipfw-start-rule = 100
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# Option: background
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# Notes.: start fail2ban as a daemon. Output is redirect to logfile.
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# Values: [true | false] Default: false
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#
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background = false
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# Option: debug
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# Notes.: enable debug mode. More verbose output and bypass root user test.
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# Values: [true | false] Default: false
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#
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debug = false
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# Option: pidlock
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# Notes.: path of the PID lock file (must be able to write to file).
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# Values: FILE Default: /var/run/fail2ban.pid
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#
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pidlock = /var/run/fail2ban.pid
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# Option: logfile
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# Notes.: logfile for logging fail2ban messages.
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# Values: FILE Default: /var/log/fail2ban.log
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#
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logfile = /var/log/fail2ban.log
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# Option: maxretry
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# Notes.: number of retrys before IP gets banned.
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# Values: NUM Default: 3
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#
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maxretry = 3
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# Option: bantime
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# Notes.: number of seconds an IP will be banned.
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# Values: NUM Default: 600
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#
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bantime = 600
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# Option: ignoreip
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# Notes.: space separated list of IP's to be ignored by fail2ban
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# Example: ignoreip = 192.168.0.1 123.45.235.65
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# Values: IP Default:
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#
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ignoreip =
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# Option: interface
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# Notes.: interface name on which the IP will be banned.
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# Values: INT Default: eth0
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#
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interface = eth0
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# Option: polltime
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# Notes.: number of seconds fail2ban sleeps between iterations.
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# Values: NUM Default: 1
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#
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polltime = 1
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# You can define a new section for each log file to check for
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# password failure. Each section has to define the following
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# options: logfile, timeregex, timepattern, failregex.
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|
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[Apache]
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# Option: enabled
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# Notes.: enable monitoring for this section.
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# Values: [true | false] Default: false
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#
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enabled = false
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|
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# Option: logfile
|
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# Notes.: logfile to monitor.
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# Values: FILE Default: /var/log/httpd/access_log
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#
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logfile = /var/log/httpd/access_log
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|
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# Option: timeregex
|
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# Notes.: regex to match timestamp in Apache logfile.
|
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# Values: [Wed Jan 05 15:08:01 2005]
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# Default \S{3} \S{3} \d{2} \d{2}:\d{2}:\d{2} \d{4}
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#
|
||||
timeregex = \S{3} \S{3} \d{2} \d{2}:\d{2}:\d{2} \d{4}
|
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|
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# Option: timepattern
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# Notes.: format used in "timeregex" fields definition. Note that '%' must be
|
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# escaped with '%' (see http://rgruet.free.fr/PQR2.3.html#timeModule)
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# Values: TEXT Default: %%a %%b %%d %%H:%%M:%%S %%Y
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#
|
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timepattern = %%a %%b %%d %%H:%%M:%%S %%Y
|
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|
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# Option: failregex
|
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# Notes.: regex to match the password failure messages in the logfile.
|
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# Values: TEXT Default: authentication failure|user .* not found
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#
|
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failregex = authentication failure|user .* not found
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[SSH]
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# Option: enabled
|
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# Notes.: enable monitoring for this section.
|
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# Values: [true | false] Default: true
|
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#
|
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enabled = true
|
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|
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# Option: logfile
|
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# Notes.: logfile to monitor.
|
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# Values: FILE Default: /var/log/secure
|
||||
#
|
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logfile = /var/log/secure
|
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|
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# Option: timeregex
|
||||
# Notes.: regex to match timestamp in SSH logfile.
|
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# Values: [Mar 7 17:53:28]
|
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# Default \S{3}\s{1,2}\d{1,2} \d{2}:\d{2}:\d{2}
|
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#
|
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timeregex = \S{3}\s{1,2}\d{1,2} \d{2}:\d{2}:\d{2}
|
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|
||||
# Option: timepattern
|
||||
# Notes.: format used in "timeregex" fields definition. Note that '%' must be
|
||||
# escaped with '%' (see http://rgruet.free.fr/PQR2.3.html#timeModule)
|
||||
# Values: TEXT Default: %%b %%d %%H:%%M:%%S
|
||||
#
|
||||
timepattern = %%b %%d %%H:%%M:%%S
|
||||
|
||||
# Option: failregex
|
||||
# Notes.: regex to match the password failures messages in the logfile.
|
||||
# Values: TEXT Default: Authentication failure|Failed password|Invalid user
|
||||
#
|
||||
failregex = Authentication failure|Failed password|Invalid user
|
||||
|
|
@ -0,0 +1,23 @@
|
|||
# This file is part of Fail2Ban.
|
||||
#
|
||||
# Fail2Ban is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# Fail2Ban is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Fail2Ban; if not, write to the Free Software
|
||||
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
#
|
||||
# Author: Cyril Jaquier
|
||||
#
|
||||
# $Revision: 1.1 $
|
||||
|
||||
# Command line options for Fail2Ban. Refer to "fail2ban.py -h" for
|
||||
# valid options.
|
||||
FAIL2BAN_OPTS="-v"
|
||||
|
|
@ -0,0 +1,50 @@
|
|||
#!/sbin/runscript
|
||||
# This file is part of Fail2Ban.
|
||||
#
|
||||
# Fail2Ban is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# Fail2Ban is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Fail2Ban; if not, write to the Free Software
|
||||
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
#
|
||||
# Author: Sireyessire, Cyril Jaquier
|
||||
#
|
||||
# $Revision: 1.1 $
|
||||
|
||||
opts="start stop restart showlog"
|
||||
|
||||
FAIL2BAN="/usr/bin/fail2ban.py"
|
||||
|
||||
depend() {
|
||||
need net
|
||||
need logger
|
||||
after iptables
|
||||
}
|
||||
|
||||
start() {
|
||||
ebegin "Starting fail2ban"
|
||||
${FAIL2BAN} -b ${FAIL2BAN_OPTS}
|
||||
eend $? "Failed to start fail2ban"
|
||||
}
|
||||
|
||||
stop() {
|
||||
ebegin "Stopping fail2ban"
|
||||
${FAIL2BAN} -k
|
||||
eend $? "Failed to stop fail2ban"
|
||||
}
|
||||
|
||||
zap() {
|
||||
rm /var/run/fail2ban.pid
|
||||
}
|
||||
|
||||
showlog(){
|
||||
less /var/log/fail2ban.log
|
||||
}
|
||||
|
|
@ -0,0 +1,25 @@
|
|||
# This file is part of Fail2Ban.
|
||||
#
|
||||
# Fail2Ban is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# Fail2Ban is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Fail2Ban; if not, write to the Free Software
|
||||
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
# Author: Cyril Jaquier
|
||||
#
|
||||
# $Revision: 1.1 $
|
||||
|
||||
__author__ = "Cyril Jaquier"
|
||||
__version__ = "$Revision: 1.1 $"
|
||||
__date__ = "$Date: 2005/02/18 13:26:41 $"
|
||||
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
|
||||
__license__ = "GPL"
|
||||
|
|
@ -0,0 +1,80 @@
|
|||
# This file is part of Fail2Ban.
|
||||
#
|
||||
# Fail2Ban is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# Fail2Ban is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Fail2Ban; if not, write to the Free Software
|
||||
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
# Author: Cyril Jaquier
|
||||
#
|
||||
# $Revision: 1.5 $
|
||||
|
||||
__author__ = "Cyril Jaquier"
|
||||
__version__ = "$Revision: 1.5 $"
|
||||
__date__ = "$Date: 2005/03/06 17:45:55 $"
|
||||
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
|
||||
__license__ = "GPL"
|
||||
|
||||
from ConfigParser import *
|
||||
|
||||
class ConfigReader:
|
||||
""" This class allow the handling of the configuration options.
|
||||
The DEFAULT section contains the global information about
|
||||
Fail2Ban. Each other section is for a different log file.
|
||||
"""
|
||||
|
||||
# Each optionValues entry is composed of an array with:
|
||||
# 0 -> the type of the option
|
||||
# 1 -> the name of the option
|
||||
# 2 -> the default value for the option
|
||||
optionValues = (["bool", "enabled", True],
|
||||
["str", "logfile", "/dev/null"],
|
||||
["str", "timeregex", ""],
|
||||
["str", "timepattern", ""],
|
||||
["str", "failregex", ""])
|
||||
|
||||
def __init__(self, logSys, confPath):
|
||||
self.confPath = confPath
|
||||
self.configParser = SafeConfigParser()
|
||||
self.logSys = logSys
|
||||
|
||||
def openConf(self):
|
||||
""" Opens the configuration file.
|
||||
"""
|
||||
self.configParser.read(self.confPath)
|
||||
|
||||
def getSections(self):
|
||||
""" Returns all the sections present in the configuration
|
||||
file except the DEFAULT section.
|
||||
"""
|
||||
return self.configParser.sections()
|
||||
|
||||
def getLogOptions(self, sec):
|
||||
""" Gets all the options of a given section. The options
|
||||
are defined in the optionValues list.
|
||||
"""
|
||||
values = dict()
|
||||
for option in self.optionValues:
|
||||
try:
|
||||
if option[0] == "bool":
|
||||
v = self.configParser.getboolean(sec, option[1])
|
||||
elif option[0] == "int":
|
||||
v = self.configParser.getint(sec, option[1])
|
||||
else:
|
||||
v = self.configParser.get(sec, option[1])
|
||||
|
||||
values[option[1]] = v
|
||||
except NoOptionError:
|
||||
self.logSys.warn("No '"+option[1]+"' defined in '"+sec+"'")
|
||||
values[option[1]] = option[2]
|
||||
return values
|
||||
|
||||
|
|
@ -0,0 +1,551 @@
|
|||
#!/usr/bin/env python
|
||||
|
||||
# This file is part of Fail2Ban.
|
||||
#
|
||||
# Fail2Ban is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# Fail2Ban is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Fail2Ban; if not, write to the Free Software
|
||||
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
# Author: Cyril Jaquier
|
||||
#
|
||||
# $Revision: 1.20 $
|
||||
|
||||
__author__ = "Cyril Jaquier"
|
||||
__version__ = "$Revision: 1.20 $"
|
||||
__date__ = "$Date: 2005/06/30 09:26:38 $"
|
||||
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
|
||||
__license__ = "GPL"
|
||||
|
||||
import time, sys, getopt, os, signal, string
|
||||
from ConfigParser import *
|
||||
|
||||
# Checks if log4py is present.
|
||||
try:
|
||||
import log4py
|
||||
except:
|
||||
print "log4py is needed (see README)"
|
||||
sys.exit(-1)
|
||||
|
||||
# Appends our own modules path
|
||||
sys.path.append('/usr/lib/fail2ban')
|
||||
|
||||
from firewall.iptables import Iptables
|
||||
from firewall.ipfw import Ipfw
|
||||
from firewall.ipfwadm import Ipfwadm
|
||||
from logreader.logreader import LogReader
|
||||
from confreader.configreader import ConfigReader
|
||||
from version import version
|
||||
|
||||
def usage():
|
||||
print "Usage: fail2ban.py [OPTIONS]"
|
||||
print
|
||||
print "Fail2Ban v"+version+" reads log file that contains password failure report"
|
||||
print "and bans the corresponding IP address using iptables."
|
||||
print
|
||||
print " -b start fail2ban in background"
|
||||
print " -d start fail2ban in debug mode"
|
||||
print " -e <INTF> ban IP on the INTF interface"
|
||||
print " -c <FILE> read configuration file FILE"
|
||||
print " -p <FILE> create PID lock in FILE"
|
||||
print " -h display this help message"
|
||||
print " -i <IP(s)> IP(s) to ignore"
|
||||
print " -k kill a currently running Fail2Ban instance"
|
||||
print " -l <FILE> log message in FILE"
|
||||
print " -r <VALUE> allow a max of VALUE password failure"
|
||||
print " -t <TIME> ban IP for TIME seconds"
|
||||
print " -v verbose. Use twice for greater effect"
|
||||
print " -w <FIWA> select the firewall to use. Can be iptables,"
|
||||
print " ipfwadm or ipfw"
|
||||
print
|
||||
print "Report bugs to <lostcontrol@users.sourceforge.net>"
|
||||
sys.exit(0)
|
||||
|
||||
def checkForRoot():
|
||||
""" Check for root user.
|
||||
"""
|
||||
uid = `os.getuid()`
|
||||
if uid == '0':
|
||||
return True
|
||||
else:
|
||||
return False
|
||||
|
||||
def createDaemon():
|
||||
"""Detach a process from the controlling terminal and run it in the
|
||||
background as a daemon.
|
||||
|
||||
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/278731
|
||||
"""
|
||||
|
||||
try:
|
||||
# Fork a child process so the parent can exit. This will return control
|
||||
# to the command line or shell. This is required so that the new process
|
||||
# is guaranteed not to be a process group leader. We have this guarantee
|
||||
# because the process GID of the parent is inherited by the child, but
|
||||
# the child gets a new PID, making it impossible for its PID to equal its
|
||||
# PGID.
|
||||
pid = os.fork()
|
||||
except OSError, e:
|
||||
return((e.errno, e.strerror)) # ERROR (return a tuple)
|
||||
|
||||
if (pid == 0): # The first child.
|
||||
|
||||
# Next we call os.setsid() to become the session leader of this new
|
||||
# session. The process also becomes the process group leader of the
|
||||
# new process group. Since a controlling terminal is associated with a
|
||||
# session, and this new session has not yet acquired a controlling
|
||||
# terminal our process now has no controlling terminal. This shouldn't
|
||||
# fail, since we're guaranteed that the child is not a process group
|
||||
# leader.
|
||||
os.setsid()
|
||||
|
||||
# When the first child terminates, all processes in the second child
|
||||
# are sent a SIGHUP, so it's ignored.
|
||||
signal.signal(signal.SIGHUP, signal.SIG_IGN)
|
||||
|
||||
try:
|
||||
# Fork a second child to prevent zombies. Since the first child is
|
||||
# a session leader without a controlling terminal, it's possible for
|
||||
# it to acquire one by opening a terminal in the future. This second
|
||||
# fork guarantees that the child is no longer a session leader, thus
|
||||
# preventing the daemon from ever acquiring a controlling terminal.
|
||||
pid = os.fork() # Fork a second child.
|
||||
except OSError, e:
|
||||
return((e.errno, e.strerror)) # ERROR (return a tuple)
|
||||
|
||||
if (pid == 0): # The second child.
|
||||
# Ensure that the daemon doesn't keep any directory in use. Failure
|
||||
# to do this could make a filesystem unmountable.
|
||||
os.chdir("/")
|
||||
# Give the child complete control over permissions.
|
||||
os.umask(0)
|
||||
else:
|
||||
os._exit(0) # Exit parent (the first child) of the second child.
|
||||
else:
|
||||
os._exit(0) # Exit parent of the first child.
|
||||
|
||||
# Close all open files. Try the system configuration variable, SC_OPEN_MAX,
|
||||
# for the maximum number of open files to close. If it doesn't exist, use
|
||||
# the default value (configurable).
|
||||
try:
|
||||
maxfd = os.sysconf("SC_OPEN_MAX")
|
||||
except (AttributeError, ValueError):
|
||||
maxfd = 256 # default maximum
|
||||
|
||||
for fd in range(0, maxfd):
|
||||
try:
|
||||
os.close(fd)
|
||||
except OSError: # ERROR (ignore)
|
||||
pass
|
||||
|
||||
# Redirect the standard file descriptors to /dev/null.
|
||||
os.open("/dev/null", os.O_RDONLY) # standard input (0)
|
||||
os.open("/dev/null", os.O_RDWR) # standard output (1)
|
||||
os.open("/dev/null", os.O_RDWR) # standard error (2)
|
||||
|
||||
return True
|
||||
|
||||
def sigTERMhandler(signum, frame):
|
||||
""" Handles the TERM signal when in daemon mode in order to
|
||||
exit properly.
|
||||
"""
|
||||
logSys.debug("Signal handler called with sig "+`signum`)
|
||||
killApp()
|
||||
|
||||
def killApp():
|
||||
""" Flush the ban list, remove the PID lock file and exit
|
||||
nicely.
|
||||
"""
|
||||
logSys.warn("Restoring firewall rules...")
|
||||
fireWall.flushBanList(conf["debug"])
|
||||
removePID(conf["pidlock"])
|
||||
logSys.info("Exiting...")
|
||||
sys.exit(0)
|
||||
|
||||
def checkForPID(lockfile):
|
||||
""" Checks for running Fail2Ban.
|
||||
|
||||
Returns the current PID if Fail2Ban is running or False
|
||||
if no instance found.
|
||||
"""
|
||||
try:
|
||||
fileHandler = open(lockfile)
|
||||
pid = fileHandler.readline()
|
||||
return pid
|
||||
except IOError:
|
||||
return False
|
||||
|
||||
def createPID(lockfile):
|
||||
""" Creates a PID lock file with the current PID.
|
||||
"""
|
||||
fileHandler = open(lockfile, mode='w')
|
||||
pid = os.getpid()
|
||||
fileHandler.write(`pid`+'\n')
|
||||
fileHandler.close()
|
||||
logSys.debug("Created PID lock ("+`pid`+") in "+lockfile)
|
||||
|
||||
def removePID(lockfile):
|
||||
""" Remove PID lock.
|
||||
"""
|
||||
os.remove(lockfile)
|
||||
logSys.debug("Removed PID lock "+lockfile)
|
||||
|
||||
def killPID(pid):
|
||||
""" Kills the process with the given PID using the
|
||||
INT signal (same effect as <ctrl>+<c>).
|
||||
"""
|
||||
try:
|
||||
return os.kill(pid, 2)
|
||||
except OSError:
|
||||
logSys.error("Can not kill process " + `pid` + ". Please check that " +
|
||||
"Fail2Ban is not running and remove the file " +
|
||||
"'/tmp/fail2ban.pid'")
|
||||
|
||||
if __name__ == "__main__":
|
||||
|
||||
# Gets an instance of log4py.
|
||||
logSys = log4py.Logger().get_instance()
|
||||
logSys.set_formatstring("%T %L %M")
|
||||
|
||||
conf = dict()
|
||||
conf["verbose"] = 0
|
||||
conf["background"] = False
|
||||
conf["debug"] = False
|
||||
conf["conffile"] = "/etc/fail2ban.conf"
|
||||
conf["pidlock"] = "/var/run/fail2ban.pid"
|
||||
conf["logging"] = False
|
||||
conf["logfile"] = "/var/log/fail2ban.log"
|
||||
conf["maxretry"] = 3
|
||||
conf["bantime"] = 600
|
||||
conf["ignoreip"] = ''
|
||||
conf["interface"] = "eth0"
|
||||
conf["firewall"] = "iptables"
|
||||
conf["ipfw-start-rule"] = 0
|
||||
conf["polltime"] = 1
|
||||
|
||||
# Reads the command line options.
|
||||
try:
|
||||
optList, args = getopt.getopt(sys.argv[1:], 'hvbdkc:l:t:i:r:e:w:p:')
|
||||
except getopt.GetoptError:
|
||||
usage()
|
||||
|
||||
# Pre-parsing of command line options for the -c option
|
||||
for opt in optList:
|
||||
if opt[0] == "-c":
|
||||
conf["conffile"] = opt[1]
|
||||
|
||||
# Config file
|
||||
configParser = SafeConfigParser()
|
||||
configParser.read(conf["conffile"])
|
||||
|
||||
# background
|
||||
try:
|
||||
conf["background"] = configParser.getboolean("DEFAULT", "background")
|
||||
except ValueError:
|
||||
logSys.warn("background option should be a boolean")
|
||||
logSys.warn("Using default value")
|
||||
except NoOptionError:
|
||||
logSys.warn("background option not in config file")
|
||||
logSys.warn("Using default value")
|
||||
|
||||
# debug
|
||||
try:
|
||||
conf["debug"] = configParser.getboolean("DEFAULT", "debug")
|
||||
except ValueError:
|
||||
logSys.warn("debug option should be a boolean")
|
||||
logSys.warn("Using default value")
|
||||
except NoOptionError:
|
||||
logSys.warn("debug option not in config file")
|
||||
logSys.warn("Using default value")
|
||||
|
||||
# logfile
|
||||
try:
|
||||
conf["logfile"] = configParser.get("DEFAULT", "logfile")
|
||||
except ValueError:
|
||||
logSys.warn("logfile option should be a string")
|
||||
logSys.warn("Using default value")
|
||||
except NoOptionError:
|
||||
logSys.warn("logfile option not in config file")
|
||||
logSys.warn("Using default value")
|
||||
|
||||
# pidlock
|
||||
try:
|
||||
conf["pidlock"] = configParser.get("DEFAULT", "pidlock")
|
||||
except ValueError:
|
||||
logSys.warn("pidlock option should be a string")
|
||||
logSys.warn("Using default value")
|
||||
except NoOptionError:
|
||||
logSys.warn("pidlock option not in config file")
|
||||
logSys.warn("Using default value")
|
||||
|
||||
# maxretry
|
||||
try:
|
||||
conf["maxretry"] = configParser.getint("DEFAULT", "maxretry")
|
||||
except ValueError:
|
||||
logSys.warn("maxretry option should be an integer")
|
||||
logSys.warn("Using default value")
|
||||
except NoOptionError:
|
||||
logSys.warn("maxretry option not in config file")
|
||||
logSys.warn("Using default value")
|
||||
|
||||
# bantime
|
||||
try:
|
||||
conf["bantime"] = configParser.getint("DEFAULT", "bantime")
|
||||
except ValueError:
|
||||
logSys.warn("bantime option should be an integer")
|
||||
logSys.warn("Using default value")
|
||||
except NoOptionError:
|
||||
logSys.warn("bantime option not in config file")
|
||||
logSys.warn("Using default value")
|
||||
|
||||
# ignoreip
|
||||
try:
|
||||
conf["ignoreip"] = configParser.get("DEFAULT", "ignoreip")
|
||||
except ValueError:
|
||||
logSys.warn("ignoreip option should be a string")
|
||||
logSys.warn("Using default value")
|
||||
except NoOptionError:
|
||||
logSys.warn("ignoreip option not in config file")
|
||||
logSys.warn("Using default value")
|
||||
|
||||
# interface
|
||||
try:
|
||||
conf["interface"] = configParser.get("DEFAULT", "interface")
|
||||
except ValueError:
|
||||
logSys.warn("interface option should be a string")
|
||||
logSys.warn("Using default value")
|
||||
except NoOptionError:
|
||||
logSys.warn("interface option not in config file")
|
||||
logSys.warn("Using default value")
|
||||
|
||||
# firewall
|
||||
try:
|
||||
conf["firewall"] = configParser.get("DEFAULT", "firewall")
|
||||
except ValueError:
|
||||
logSys.warn("firewall option should be a string")
|
||||
logSys.warn("Using default value")
|
||||
except NoOptionError:
|
||||
logSys.warn("firewall option not in config file")
|
||||
logSys.warn("Using default value")
|
||||
|
||||
# ipfw-start-rule
|
||||
try:
|
||||
conf["ipfw-start-rule"] = configParser.getint("DEFAULT",
|
||||
"ipfw-start-rule")
|
||||
except ValueError:
|
||||
logSys.warn("ipfw-start-rule option should be an integer")
|
||||
logSys.warn("Using default value")
|
||||
except NoOptionError:
|
||||
logSys.warn("ipfw-start-rule option not in config file")
|
||||
logSys.warn("Using default value")
|
||||
|
||||
# polltime
|
||||
try:
|
||||
conf["polltime"] = configParser.getint("DEFAULT", "polltime")
|
||||
except ValueError:
|
||||
logSys.warn("polltime option should be an integer")
|
||||
logSys.warn("Using default value")
|
||||
except NoOptionError:
|
||||
logSys.warn("polltime option not in config file")
|
||||
logSys.warn("Using default value")
|
||||
|
||||
for opt in optList:
|
||||
if opt[0] == "-h":
|
||||
usage()
|
||||
if opt[0] == "-v":
|
||||
conf["verbose"] = conf["verbose"] + 1
|
||||
if opt[0] == "-b":
|
||||
conf["background"] = True
|
||||
if opt[0] == "-d":
|
||||
conf["debug"] = True
|
||||
if opt[0] == "-e":
|
||||
conf["interface"] = opt[1]
|
||||
if opt[0] == "-l":
|
||||
conf["logging"] = True
|
||||
conf["logfile"] = opt[1]
|
||||
if opt[0] == "-t":
|
||||
try:
|
||||
conf["bantime"] = int(opt[1])
|
||||
except ValueError:
|
||||
logSys.warn("banTime must be an integer")
|
||||
logSys.warn("Using default value")
|
||||
if opt[0] == "-i":
|
||||
conf["ignoreip"] = opt[1]
|
||||
if opt[0] == "-r":
|
||||
conf["retrymax"] = int(opt[1])
|
||||
if opt[0] == "-w":
|
||||
conf["firewall"] = opt[1]
|
||||
if opt[0] == "-p":
|
||||
conf["pidlock"] = opt[1]
|
||||
if opt[0] == "-k":
|
||||
pid = checkForPID(conf["pidlock"])
|
||||
if pid:
|
||||
killPID(int(pid))
|
||||
logSys.warn("Killed Fail2Ban with PID "+pid)
|
||||
sys.exit(0)
|
||||
else:
|
||||
logSys.error("No running Fail2Ban found")
|
||||
sys.exit(-1)
|
||||
|
||||
# Process some options
|
||||
for c in conf:
|
||||
if c == "verbose":
|
||||
logSys.warn("Verbose level is "+`conf[c]`)
|
||||
if conf[c] == 1:
|
||||
logSys.set_loglevel(log4py.LOGLEVEL_VERBOSE)
|
||||
elif conf[c] > 1:
|
||||
logSys.set_loglevel(log4py.LOGLEVEL_DEBUG)
|
||||
elif c == "debug" and conf[c]:
|
||||
logSys.set_loglevel(log4py.LOGLEVEL_DEBUG)
|
||||
logSys.set_formatstring(log4py.FMT_DEBUG)
|
||||
elif c == "background" and conf[c]:
|
||||
retCode = createDaemon()
|
||||
signal.signal(signal.SIGTERM, sigTERMhandler)
|
||||
logSys.set_target(conf["logfile"])
|
||||
if not retCode:
|
||||
logSys.error("Unable to start daemon")
|
||||
sys.exit(-1)
|
||||
elif c == "logging" and conf[c]:
|
||||
try:
|
||||
open(conf["logfile"], "a")
|
||||
logSys.set_target(conf["logfile"])
|
||||
except IOError:
|
||||
logSys.warn("Unable to log to "+conf["logfile"])
|
||||
logSys.warn("Using default output for logging")
|
||||
elif c == "ignoreip":
|
||||
ignoreIPList = conf[c].split(' ')
|
||||
elif c == "firewall":
|
||||
conf[c] = string.lower(conf[c])
|
||||
if conf[c] == "ipfw":
|
||||
fireWallName = "Ipfw"
|
||||
elif conf[c] == "ipfwadm":
|
||||
fireWallName = "Ipfwadm"
|
||||
else:
|
||||
fireWallName = "Iptables"
|
||||
|
||||
# Checks for root user. This is necessary because log files
|
||||
# are owned by root and firewall needs root access.
|
||||
if not checkForRoot():
|
||||
logSys.error("You must be root")
|
||||
if not conf["debug"]:
|
||||
sys.exit(-1)
|
||||
|
||||
# Checks that no instance of Fail2Ban is currently running.
|
||||
pid = checkForPID(conf["pidlock"])
|
||||
if pid:
|
||||
logSys.error("Fail2Ban already running with PID "+pid)
|
||||
sys.exit(-1)
|
||||
else:
|
||||
createPID(conf["pidlock"])
|
||||
|
||||
logSys.debug("ConfFile is "+conf["conffile"])
|
||||
logSys.debug("BanTime is "+`conf["bantime"]`)
|
||||
logSys.debug("retryAllowed is "+`conf["maxretry"]`)
|
||||
|
||||
# Reads the config file and create a LogReader instance for
|
||||
# each log file to check.
|
||||
confReader = ConfigReader(logSys, conf["conffile"]);
|
||||
confReader.openConf()
|
||||
logList = list()
|
||||
for t in confReader.getSections():
|
||||
l = confReader.getLogOptions(t)
|
||||
if l["enabled"]:
|
||||
lObj = LogReader(logSys, l["logfile"], l["timeregex"],
|
||||
l["timepattern"], l["failregex"], conf["bantime"])
|
||||
lObj.setName(t)
|
||||
logList.append(lObj)
|
||||
|
||||
# Creates one instance of Iptables (thanks to Pyhton dynamic
|
||||
# features).
|
||||
fireWallObj = eval(fireWallName)
|
||||
fireWall = fireWallObj(conf["bantime"], logSys, conf["interface"])
|
||||
|
||||
# IPFW needs rules number. The configuration option "ipfw-start-rule"
|
||||
# defines the first rule number used by Fail2Ban.
|
||||
if fireWallName == "Ipfw":
|
||||
fireWall.setCrtRuleNbr(conf["ipfw-start-rule"])
|
||||
|
||||
# We add 127.0.0.1 to the ignore list has we do not want
|
||||
# to be ban ourself.
|
||||
for element in logList:
|
||||
element.addIgnoreIP("127.0.0.1")
|
||||
while len(ignoreIPList) > 0:
|
||||
ip = ignoreIPList.pop()
|
||||
for element in logList:
|
||||
element.addIgnoreIP(ip)
|
||||
|
||||
logSys.info("Fail2Ban v"+version+" is running")
|
||||
failListFull = dict()
|
||||
# Main loop
|
||||
while True:
|
||||
try:
|
||||
sys.stdout.flush()
|
||||
sys.stderr.flush()
|
||||
|
||||
# Checks if some IP have to be remove from ban
|
||||
# list.
|
||||
fireWall.checkForUnBan(conf["debug"])
|
||||
|
||||
# If the log file has not been modified since the
|
||||
# last time, we sleep for 1 second. This is active
|
||||
# polling so not very effective.
|
||||
modList = list()
|
||||
for element in logList:
|
||||
if element.isModified():
|
||||
modList.append(element)
|
||||
|
||||
if len(modList) == 0:
|
||||
time.sleep(conf["polltime"])
|
||||
continue
|
||||
|
||||
# Gets the failure list from the log file. For a given IP,
|
||||
# takes only the service which has the most password failures.
|
||||
failList = dict()
|
||||
for element in modList:
|
||||
e = element.getFailures()
|
||||
for key in e.iterkeys():
|
||||
if failList.has_key(key):
|
||||
if failList[key][0] < e[key][0]:
|
||||
failList[key] = (e[key][0], e[key][1], element)
|
||||
else:
|
||||
failList[key] = (e[key][0], e[key][1], element)
|
||||
|
||||
# Add the last log failures to the global failure list.
|
||||
for key in failList.iterkeys():
|
||||
if failListFull.has_key(key):
|
||||
failListFull[key] = (failListFull[key][0] + 1,
|
||||
failList[key][1], failList[key][2])
|
||||
else:
|
||||
failListFull[key] = failList[key]
|
||||
|
||||
# Remove the oldest failure attempts from the global list.
|
||||
unixTime = time.time()
|
||||
failListFullTemp = failListFull.copy()
|
||||
for key in failListFullTemp.iterkeys():
|
||||
failTime = failListFullTemp[key][2].getFindTime()
|
||||
if failListFullTemp[key][1] < unixTime - failTime:
|
||||
del failListFull[key]
|
||||
|
||||
# We iterate the failure list and ban IP that make
|
||||
# *retryAllowed* login failures.
|
||||
failListFullTemp = failListFull.copy()
|
||||
for key in failListFullTemp.iterkeys():
|
||||
element = failListFullTemp[key]
|
||||
if element[0] >= conf["maxretry"]:
|
||||
logSys.info(element[2].getName()+": "+key+" has "+
|
||||
`element[0]`+" login failure(s). Banned.")
|
||||
fireWall.addBanIP(key, conf["debug"])
|
||||
del failListFull[key]
|
||||
|
||||
except KeyboardInterrupt:
|
||||
# When the user press <ctrl>+<c> we exit nicely.
|
||||
killApp()
|
||||
|
|
@ -0,0 +1,25 @@
|
|||
# This file is part of Fail2Ban.
|
||||
#
|
||||
# Fail2Ban is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# Fail2Ban is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Fail2Ban; if not, write to the Free Software
|
||||
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
# Author: Cyril Jaquier
|
||||
#
|
||||
# $Revision: 1.1 $
|
||||
|
||||
__author__ = "Cyril Jaquier"
|
||||
__version__ = "$Revision: 1.1 $"
|
||||
__date__ = "$Date: 2004/10/09 15:33:33 $"
|
||||
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
|
||||
__license__ = "GPL"
|
||||
|
|
@ -0,0 +1,98 @@
|
|||
# This file is part of Fail2Ban.
|
||||
#
|
||||
# Fail2Ban is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# Fail2Ban is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Fail2Ban; if not, write to the Free Software
|
||||
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
# Author: Cyril Jaquier
|
||||
#
|
||||
# $Revision: 1.8 $
|
||||
|
||||
__author__ = "Cyril Jaquier"
|
||||
__version__ = "$Revision: 1.8 $"
|
||||
__date__ = "$Date: 2005/03/06 17:46:56 $"
|
||||
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
|
||||
__license__ = "GPL"
|
||||
|
||||
import time, os
|
||||
|
||||
class Firewall:
|
||||
""" Manages the ban list and executes the command that ban
|
||||
the IP.
|
||||
"""
|
||||
|
||||
banList = dict()
|
||||
|
||||
def __init__(self, banTime, logSys, interface):
|
||||
self.banTime = banTime
|
||||
self.logSys = logSys
|
||||
self.interface = interface
|
||||
|
||||
def addBanIP(self, ip, debug):
|
||||
""" Bans an IP.
|
||||
"""
|
||||
if not self.inBanList(ip):
|
||||
self.logSys.warn("Ban "+ip)
|
||||
self.banList[ip] = time.time()
|
||||
self.__executeCmd(self.banIP(ip), debug)
|
||||
else:
|
||||
self.logSys.error(ip+" already in ban list")
|
||||
|
||||
def delBanIP(self, ip, debug):
|
||||
""" Unban an IP.
|
||||
"""
|
||||
if self.inBanList(ip):
|
||||
self.logSys.warn("Unban "+ip)
|
||||
del self.banList[ip]
|
||||
self.__executeCmd(self.unBanIP(ip), debug)
|
||||
else:
|
||||
self.logSys.error(ip+" not in ban list")
|
||||
|
||||
def inBanList(self, ip):
|
||||
""" Checks if IP is in ban list.
|
||||
"""
|
||||
return self.banList.has_key(ip)
|
||||
|
||||
def checkForUnBan(self, debug):
|
||||
""" Check for IP to remove from ban list.
|
||||
"""
|
||||
banListTemp = self.banList.copy()
|
||||
for element in banListTemp.iteritems():
|
||||
ip = element[0]
|
||||
btime = element[1]
|
||||
if btime < time.time()-self.banTime:
|
||||
self.delBanIP(ip, debug)
|
||||
|
||||
def flushBanList(self, debug):
|
||||
""" Flushes the ban list and of course the firewall rules.
|
||||
Called when fail2ban exits.
|
||||
"""
|
||||
banListTemp = self.banList.copy()
|
||||
for element in banListTemp.iteritems():
|
||||
ip = element[0]
|
||||
self.delBanIP(ip, debug)
|
||||
|
||||
def __executeCmd(self, cmd, debug):
|
||||
""" Executes an OS command.
|
||||
"""
|
||||
self.logSys.debug(cmd)
|
||||
if not debug:
|
||||
return os.system(cmd)
|
||||
else:
|
||||
return None
|
||||
|
||||
def viewBanList(self):
|
||||
""" Prints the ban list on screen. Usefull for debugging.
|
||||
"""
|
||||
for element in self.banList.iteritems():
|
||||
print element
|
||||
|
|
@ -0,0 +1,72 @@
|
|||
# This file is part of Fail2Ban.
|
||||
#
|
||||
# Fail2Ban is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# Fail2Ban is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Fail2Ban; if not, write to the Free Software
|
||||
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
# Author: Cyril Jaquier
|
||||
#
|
||||
# $Revision: 1.4 $
|
||||
|
||||
__author__ = "Cyril Jaquier"
|
||||
__version__ = "$Revision: 1.4 $"
|
||||
__date__ = "$Date: 2005/03/06 17:47:51 $"
|
||||
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
|
||||
__license__ = "GPL"
|
||||
|
||||
import os
|
||||
|
||||
from firewall import Firewall
|
||||
|
||||
class Ipfw(Firewall):
|
||||
""" This class contains specific methods and variables for the
|
||||
iptables firewall. Must implements the 'abstracts' methods
|
||||
banIP(ip) and unBanIP(ip).
|
||||
|
||||
Must adds abstract methods definition:
|
||||
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/266468
|
||||
"""
|
||||
|
||||
crtRuleNbr = 0
|
||||
|
||||
def getCrtRuleNbr(self):
|
||||
""" Gets the current rule number.
|
||||
"""
|
||||
return self.crtRuleNbr
|
||||
|
||||
def setCrtRuleNbr(self, value):
|
||||
""" Sets the current rule number.
|
||||
"""
|
||||
self.crtRuleNbr = value
|
||||
|
||||
def banIP(self, ip):
|
||||
""" Returns query to ban IP.
|
||||
"""
|
||||
query = "ipfw -q add "+`self.crtRuleNbr`+" deny ip from "+ip+" to any"
|
||||
self.crtRuleNbr = self.crtRuleNbr + 1
|
||||
return query
|
||||
|
||||
def unBanIP(self, ip):
|
||||
""" Returns query to unban IP.
|
||||
"""
|
||||
ruleNbr = str(self.__findRuleNumber(ip))
|
||||
query = "ipfw -q delete "+ruleNbr
|
||||
return query
|
||||
|
||||
def __findRuleNumber(self, ip):
|
||||
""" Uses shell commands in order to find the rule
|
||||
number we want to delete.
|
||||
"""
|
||||
output = os.popen("ipfw list|grep \"from "+ip+" to\"|awk '{print $1}'",
|
||||
"r");
|
||||
return output.read()
|
||||
|
|
@ -0,0 +1,48 @@
|
|||
# This file is part of Fail2Ban.
|
||||
#
|
||||
# Fail2Ban is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# Fail2Ban is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Fail2Ban; if not, write to the Free Software
|
||||
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
# Author: Cyril Jaquier
|
||||
#
|
||||
# $Revision: 1.1 $
|
||||
|
||||
__author__ = "Cyril Jaquier"
|
||||
__version__ = "$Revision: 1.1 $"
|
||||
__date__ = "$Date: 2004/11/06 14:02:27 $"
|
||||
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
|
||||
__license__ = "GPL"
|
||||
|
||||
from firewall import Firewall
|
||||
|
||||
class Ipfwadm(Firewall):
|
||||
""" This class contains specific methods and variables for the
|
||||
iptables firewall. Must implements the 'abstracts' methods
|
||||
banIP(ip) and unBanIP(ip).
|
||||
|
||||
Must adds abstract methods definition:
|
||||
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/266468
|
||||
"""
|
||||
|
||||
def banIP(self, ip):
|
||||
""" Returns query to ban IP.
|
||||
"""
|
||||
query = "ipfwadm -I -a deny -W "+self.interface+" -S "+ip
|
||||
return query
|
||||
|
||||
def unBanIP(self, ip):
|
||||
""" Returns query to unban IP.
|
||||
"""
|
||||
query = "ipfwadm -I -d deny -W "+self.interface+" -S "+ip
|
||||
return query
|
||||
|
|
@ -0,0 +1,48 @@
|
|||
# This file is part of Fail2Ban.
|
||||
#
|
||||
# Fail2Ban is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# Fail2Ban is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Fail2Ban; if not, write to the Free Software
|
||||
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
# Author: Cyril Jaquier
|
||||
#
|
||||
# $Revision: 1.5 $
|
||||
|
||||
__author__ = "Cyril Jaquier"
|
||||
__version__ = "$Revision: 1.5 $"
|
||||
__date__ = "$Date: 2004/11/06 14:02:07 $"
|
||||
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
|
||||
__license__ = "GPL"
|
||||
|
||||
from firewall import Firewall
|
||||
|
||||
class Iptables(Firewall):
|
||||
""" This class contains specific methods and variables for the
|
||||
iptables firewall. Must implements the 'abstracts' methods
|
||||
banIP(ip) and unBanIP(ip).
|
||||
|
||||
Must adds abstract methods definition:
|
||||
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/266468
|
||||
"""
|
||||
|
||||
def banIP(self, ip):
|
||||
""" Returns query to ban IP.
|
||||
"""
|
||||
query = "iptables -I INPUT 1 -i "+self.interface+" -s "+ip+" -j DROP"
|
||||
return query
|
||||
|
||||
def unBanIP(self, ip):
|
||||
""" Returns query to unban IP.
|
||||
"""
|
||||
query = "iptables -D INPUT -i "+self.interface+" -s "+ip+" -j DROP"
|
||||
return query
|
||||
|
|
@ -0,0 +1,25 @@
|
|||
# This file is part of Fail2Ban.
|
||||
#
|
||||
# Fail2Ban is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# Fail2Ban is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Fail2Ban; if not, write to the Free Software
|
||||
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
# Author: Cyril Jaquier
|
||||
#
|
||||
# $Revision: 1.1 $
|
||||
|
||||
__author__ = "Cyril Jaquier"
|
||||
__version__ = "$Revision: 1.1 $"
|
||||
__date__ = "$Date: 2004/10/10 13:33:40 $"
|
||||
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
|
||||
__license__ = "GPL"
|
||||
|
|
@ -0,0 +1,189 @@
|
|||
# This file is part of Fail2Ban.
|
||||
#
|
||||
# Fail2Ban is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# Fail2Ban is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Fail2Ban; if not, write to the Free Software
|
||||
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
# Author: Cyril Jaquier
|
||||
#
|
||||
# $Revision: 1.13 $
|
||||
|
||||
__author__ = "Cyril Jaquier"
|
||||
__version__ = "$Revision: 1.13 $"
|
||||
__date__ = "$Date: 2005/03/31 15:45:24 $"
|
||||
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
|
||||
__license__ = "GPL"
|
||||
|
||||
import os, sys, time, re
|
||||
|
||||
from utils.dns import *
|
||||
|
||||
class LogReader:
|
||||
""" Reads a log file and reports information about IP that make password
|
||||
failure, bad user or anything else that is considered as doubtful login
|
||||
attempt.
|
||||
"""
|
||||
|
||||
def __init__(self, logSys, logPath, timeregex, timepattern, failregex,
|
||||
findTime = 3600):
|
||||
self.logPath = logPath
|
||||
self.timeregex = timeregex
|
||||
self.timepattern = timepattern
|
||||
self.failregex = failregex
|
||||
self.findTime = findTime
|
||||
self.ignoreIpList = []
|
||||
self.lastModTime = 0
|
||||
self.logSys = logSys
|
||||
self.lastPos = 0
|
||||
self.lastDate = 0
|
||||
self.logStats = None
|
||||
|
||||
def setName(self, name):
|
||||
""" Sets the name of the log reader.
|
||||
"""
|
||||
self.name = name
|
||||
|
||||
def getName(self):
|
||||
""" Gets the name of the log reader.
|
||||
"""
|
||||
return self.name
|
||||
|
||||
def getFindTime(self):
|
||||
""" Gets the find time.
|
||||
"""
|
||||
return self.findTime
|
||||
|
||||
def addIgnoreIP(self, ip):
|
||||
""" Adds an IP to the ignore list.
|
||||
"""
|
||||
self.logSys.debug("Add "+ip+" to ignore list")
|
||||
self.ignoreIpList.append(ip)
|
||||
|
||||
def inIgnoreIPList(self, ip):
|
||||
""" Checks if IP is in the ignore list.
|
||||
"""
|
||||
return ip in self.ignoreIpList
|
||||
|
||||
def openLogFile(self):
|
||||
""" Opens the log file specified on init.
|
||||
"""
|
||||
try:
|
||||
fileHandler = open(self.logPath)
|
||||
except OSError:
|
||||
self.logSys.error("Unable to open "+self.logPath)
|
||||
sys.exit(-1)
|
||||
return fileHandler
|
||||
|
||||
def isModified(self):
|
||||
""" Checks if the log file has been modified using os.stat().
|
||||
"""
|
||||
try:
|
||||
self.logStats = os.stat(self.logPath)
|
||||
except OSError:
|
||||
self.logSys.error("Unable to get stat on "+self.logPath)
|
||||
sys.exit(-1)
|
||||
|
||||
if self.lastModTime == self.logStats.st_mtime:
|
||||
return False
|
||||
else:
|
||||
self.logSys.debug(self.logPath+" has been modified")
|
||||
self.lastModTime = self.logStats.st_mtime
|
||||
return True
|
||||
|
||||
def setFilePos(self, file):
|
||||
""" Sets the file position. We must take care of log file rotation
|
||||
and reset the position to 0 in that case. Use the log message
|
||||
timestamp in order to detect this.
|
||||
"""
|
||||
line = file.readline()
|
||||
if self.lastDate < self.getTime(line):
|
||||
self.logSys.debug("Date " + `self.lastDate` + " is " +
|
||||
"smaller than " + `self.getTime(line)`)
|
||||
self.logSys.debug("Log rotation detected for " + self.logPath)
|
||||
self.lastPos = 0
|
||||
|
||||
self.logSys.debug("Setting file position to " + `self.lastPos` + " for "
|
||||
+ self.logPath)
|
||||
file.seek(self.lastPos)
|
||||
|
||||
def getFailures(self):
|
||||
""" Gets all the failure in the log file which are
|
||||
newer than time.time()-self.findTime.
|
||||
|
||||
Returns a dict with the IP, the number of failure
|
||||
and the latest failure time.
|
||||
"""
|
||||
ipList = dict()
|
||||
self.logSys.debug(self.logPath)
|
||||
logFile = self.openLogFile()
|
||||
self.setFilePos(logFile)
|
||||
lastLine = ''
|
||||
for line in logFile.readlines():
|
||||
lastLine = line
|
||||
failList = self.findFailure(line)
|
||||
for element in failList:
|
||||
ip = element[0]
|
||||
unixTime = element[1]
|
||||
if unixTime < time.time()-self.findTime:
|
||||
break
|
||||
if self.inIgnoreIPList(ip):
|
||||
self.logSys.debug("Ignore "+ip)
|
||||
continue
|
||||
self.logSys.debug("Found "+ip)
|
||||
if ipList.has_key(ip):
|
||||
ipList[ip] = (ipList[ip][0]+1, unixTime)
|
||||
else:
|
||||
ipList[ip] = (1, unixTime)
|
||||
self.lastPos = logFile.tell()
|
||||
self.lastDate = self.getTime(lastLine)
|
||||
logFile.close()
|
||||
return ipList
|
||||
|
||||
def findFailure(self, line):
|
||||
""" Finds the failure in line. Uses the failregex pattern
|
||||
to find it and timeregex in order to find the logging
|
||||
time.
|
||||
|
||||
Returns a dict with IP and timestamp.
|
||||
"""
|
||||
failList = list()
|
||||
match = re.search(self.failregex, line)
|
||||
if match:
|
||||
timeMatch = re.search(self.timeregex, match.string)
|
||||
if timeMatch:
|
||||
date = self.getUnixTime(timeMatch.group())
|
||||
ipMatch = textToIp(match.string)
|
||||
if ipMatch:
|
||||
for ip in ipMatch:
|
||||
failList.append([ip, date])
|
||||
return failList
|
||||
|
||||
def getTime(self, line):
|
||||
""" Gets the time of a log message.
|
||||
"""
|
||||
date = 0
|
||||
timeMatch = re.search(self.timeregex, line)
|
||||
if timeMatch:
|
||||
date = self.getUnixTime(timeMatch.group())
|
||||
return date
|
||||
|
||||
def getUnixTime(self, value):
|
||||
""" Returns the Unix timestamp of the given value.
|
||||
Pattern should describe the date construction of
|
||||
value.
|
||||
"""
|
||||
date = list(time.strptime(value, self.timepattern))
|
||||
if date[0] < 2000:
|
||||
date[0] = time.gmtime()[0]
|
||||
unixTime = time.mktime(date)
|
||||
return unixTime
|
||||
|
|
@ -0,0 +1,5 @@
|
|||
[install]
|
||||
install-purelib=/usr/lib/fail2ban
|
||||
|
||||
[sdist]
|
||||
formats=bztar
|
||||
|
|
@ -0,0 +1,42 @@
|
|||
#!/usr/bin/env python
|
||||
|
||||
# This file is part of Fail2Ban.
|
||||
#
|
||||
# Fail2Ban is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# Fail2Ban is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Fail2Ban; if not, write to the Free Software
|
||||
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
# Author: Cyril Jaquier
|
||||
#
|
||||
# $Revision: 1.4 $
|
||||
|
||||
__author__ = "Cyril Jaquier"
|
||||
__version__ = "$Revision: 1.4 $"
|
||||
__date__ = "$Date: 2005/03/31 15:52:02 $"
|
||||
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
|
||||
__license__ = "GPL"
|
||||
|
||||
from distutils.core import setup
|
||||
from version import version
|
||||
|
||||
setup(
|
||||
name = "fail2ban",
|
||||
version = version,
|
||||
description = "Ban IPs that make too many password failure",
|
||||
author = "Cyril Jaquier",
|
||||
author_email = "lostcontrol@users.sourceforge.net",
|
||||
url = "http://www.sourceforge.net/projects/fail2ban",
|
||||
scripts = ['fail2ban.py'],
|
||||
py_modules = ['version'],
|
||||
packages = ['firewall', 'logreader', 'confreader', 'utils']
|
||||
)
|
||||
|
|
@ -0,0 +1,25 @@
|
|||
# This file is part of Fail2Ban.
|
||||
#
|
||||
# Fail2Ban is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# Fail2Ban is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Fail2Ban; if not, write to the Free Software
|
||||
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
# Author: Cyril Jaquier
|
||||
#
|
||||
# $Revision: 1.1 $
|
||||
|
||||
__author__ = "Cyril Jaquier"
|
||||
__version__ = "$Revision: 1.1 $"
|
||||
__date__ = "$Date: 2005/03/06 17:51:24 $"
|
||||
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
|
||||
__license__ = "GPL"
|
||||
|
|
@ -0,0 +1,73 @@
|
|||
# This file is part of Fail2Ban.
|
||||
#
|
||||
# Fail2Ban is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# Fail2Ban is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Fail2Ban; if not, write to the Free Software
|
||||
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
# Author: Cyril Jaquier
|
||||
#
|
||||
# $Revision: 1.7 $
|
||||
|
||||
__author__ = "Cyril Jaquier"
|
||||
__version__ = "$Revision: 1.7 $"
|
||||
__date__ = "$Date: 2005/05/28 19:46:18 $"
|
||||
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
|
||||
__license__ = "GPL"
|
||||
|
||||
import os, re, socket
|
||||
|
||||
def dnsToIp(dns):
|
||||
""" Convert a DNS into an IP address using the Python socket module.
|
||||
Thanks to Kevin Drapel.
|
||||
"""
|
||||
try:
|
||||
return socket.gethostbyname_ex(dns)[2]
|
||||
except socket.gaierror:
|
||||
return list()
|
||||
|
||||
def textToDns(text):
|
||||
""" Search for possible DNS in an arbitrary text.
|
||||
Thanks to Tom Pike.
|
||||
"""
|
||||
match = re.findall("(?:(?:\w|-)+\.){2,}\w+", text)
|
||||
if match:
|
||||
return match
|
||||
else:
|
||||
return []
|
||||
|
||||
def searchIP(text):
|
||||
""" Search if an IP address if directly available and return
|
||||
it.
|
||||
"""
|
||||
match = re.findall("(?:\d{1,3}\.){3}\d{1,3}", text)
|
||||
if match:
|
||||
return match
|
||||
else:
|
||||
return []
|
||||
|
||||
def textToIp(text):
|
||||
""" Return the IP of DNS found in a given text.
|
||||
"""
|
||||
ipList = list()
|
||||
# Search for plain IP
|
||||
plainIP = searchIP(text)
|
||||
for element in plainIP:
|
||||
ipList.append(element)
|
||||
if not ipList:
|
||||
# Try to get IP from possible DNS
|
||||
dnsList = textToDns(text)
|
||||
for element in dnsList:
|
||||
dns = dnsToIp(element)
|
||||
for e in dns:
|
||||
ipList.append(e)
|
||||
return ipList
|
||||
|
|
@ -0,0 +1,27 @@
|
|||
# This file is part of Fail2Ban.
|
||||
#
|
||||
# Fail2Ban is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# Fail2Ban is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Fail2Ban; if not, write to the Free Software
|
||||
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
# Author: Cyril Jaquier
|
||||
#
|
||||
# $Revision: 1.12 $
|
||||
|
||||
__author__ = "Cyril Jaquier"
|
||||
__version__ = "$Revision: 1.12 $"
|
||||
__date__ = "$Date: 2005/06/30 09:30:59 $"
|
||||
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
|
||||
__license__ = "GPL"
|
||||
|
||||
version = "0.4.1"
|
||||
Loading…
Reference in New Issue