mirror of https://github.com/fail2ban/fail2ban
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
55 lines
2.7 KiB
55 lines
2.7 KiB
# Fail2Ban filter for openssh
|
|
#
|
|
# If you want to protect OpenSSH from being bruteforced by password
|
|
# authentication then get public key authentication working before disabling
|
|
# PasswordAuthentication in sshd_config.
|
|
#
|
|
#
|
|
# "Connection from <HOST> port \d+" requires LogLevel VERBOSE in sshd_config
|
|
#
|
|
|
|
[INCLUDES]
|
|
|
|
# Read common prefixes. If any customizations available -- read them from
|
|
# common.local
|
|
before = common.conf
|
|
|
|
[Definition]
|
|
|
|
_daemon = sshd
|
|
|
|
failregex = ^%(__prefix_line)s(?:error: PAM: )?[aA]uthentication (?:failure|error) for .* from <HOST>( via \S+)?\s*$
|
|
^%(__prefix_line)s(?:error: PAM: )?User not known to the underlying authentication module for .* from <HOST>\s*$
|
|
^%(__prefix_line)sFailed \S+ for .*? from <HOST>(?: port \d*)?(?: ssh\d*)?(: (ruser .*|(\S+ ID \S+ \(serial \d+\) CA )?\S+ %(__md5hex)s(, client user ".*", client host ".*")?))?\s*$
|
|
^%(__prefix_line)sROOT LOGIN REFUSED.* FROM <HOST>\s*$
|
|
^%(__prefix_line)s[iI](?:llegal|nvalid) user .* from <HOST>\s*$
|
|
^%(__prefix_line)sUser .+ from <HOST> not allowed because not listed in AllowUsers\s*$
|
|
^%(__prefix_line)sUser .+ from <HOST> not allowed because listed in DenyUsers\s*$
|
|
^%(__prefix_line)sUser .+ from <HOST> not allowed because not in any group\s*$
|
|
^%(__prefix_line)srefused connect from \S+ \(<HOST>\)\s*$
|
|
^%(__prefix_line)sReceived disconnect from <HOST>: 3: \S+: Auth fail$
|
|
^%(__prefix_line)sUser .+ from <HOST> not allowed because a group is listed in DenyGroups\s*$
|
|
^%(__prefix_line)sUser .+ from <HOST> not allowed because none of user's groups are listed in AllowGroups\s*$
|
|
^(?P<__prefix>%(__prefix_line)s)User .+ not allowed because account is locked<SKIPLINES>(?P=__prefix)(?:error: )?Received disconnect from <HOST>: 11: Bye Bye \[preauth\]$
|
|
^(?P<__prefix>%(__prefix_line)s)Disconnecting: Too many authentication failures for .+? \[preauth\]<SKIPLINES>(?P=__prefix)(?:error: )?Connection closed by <HOST> \[preauth\]$
|
|
^(?P<__prefix>%(__prefix_line)s)Connection from <HOST> port \d+<SKIPLINES>(?P=__prefix)Disconnecting: Too many authentication failures for .+? \[preauth\]$
|
|
|
|
ignoreregex =
|
|
|
|
[Init]
|
|
|
|
# "maxlines" is number of log lines to buffer for multi-line regex searches
|
|
maxlines = 10
|
|
|
|
journalmatch = _SYSTEMD_UNIT=sshd.service + _COMM=sshd
|
|
|
|
# DEV Notes:
|
|
#
|
|
# "Failed \S+ for .*? from <HOST>..." failregex uses non-greedy catch-all because
|
|
# it is coming before use of <HOST> which is not hard-anchored at the end as well,
|
|
# and later catch-all's could contain user-provided input, which need to be greedily
|
|
# matched away first.
|
|
#
|
|
# Author: Cyril Jaquier, Yaroslav Halchenko, Petr Voralek, Daniel Black
|
|
|