Merge pull request #102 from grooverdan/ipset

Ipset

config/action.d/iptables-ipset-proto4.conf

@@ -0,0 +1,71 @@
+# Fail2Ban configuration file
+#
+# Author: Daniel Black
+#
+# This is for ipset protocol 4 (ipset v4.2). If you have a later version
+# of ipset try to use the iptables-ipset-proto6.conf as it does some things
+# nicer.
+# 
+# This requires the program ipset which is normally in package called ipset.
+#
+# IPset was a feature introduced in the linux kernel 2.6.39 and 3.0.0 kernels.
+#
+# If you are running on an older kernel you make need to patch in external
+# modules.
+#
+# On Debian machines this can be done with:
+#
+# apt-get install ipset xtables-addons-source 
+# module-assistant auto-install xtables-addons
+
+[Definition]
+
+# Option:  actionstart
+# Notes.:  command executed once at the start of Fail2Ban.
+# Values:  CMD
+#
+actionstart = ipset --create fail2ban-<name> iphash
+              iptables -I INPUT -p <protocol> -m multiport --dports <port> -m set --match-set fail2ban-<name> src -j DROP
+
+# Option:  actionstop
+# Notes.:  command executed once at the end of Fail2Ban
+# Values:  CMD
+#
+actionstop = iptables -D INPUT -p <protocol> -m multiport --dports <port> -m set --match-set fail2ban-<name> src -j DROP
+             ipset --flush fail2ban-<name>
+             ipset --destroy fail2ban-<name>
+
+# Option:  actionban
+# Notes.:  command executed when banning an IP. Take care that the
+#          command is executed with Fail2Ban user rights.
+# Tags:    <ip>  IP address
+# Values:  CMD
+#
+actionban = ipset --test fail2ban-<name> <ip> ||  ipset --add fail2ban-<name> <ip>
+
+# Option:  actionunban
+# Notes.:  command executed when unbanning an IP. Take care that the
+#          command is executed with Fail2Ban user rights.
+# Tags:    <ip>  IP address
+# Values:  CMD
+#
+actionunban = ipset --test fail2ban-<name> <ip> && ipset --del fail2ban-<name> <ip>
+
+[Init]
+
+# Defaut name of the ipset
+#
+name = default
+
+# Option:  port
+# Notes.:  specifies port to monitor
+# Values:  [ NUM | STRING ]  Default: ssh
+#
+port = ssh
+
+# Option:  protocol
+# Notes.:  internally used by config reader for interpolations.
+# Values:  [ tcp | udp | icmp | all ] Default: tcp
+#
+protocol = tcp
+

config/action.d/iptables-ipset-proto6.conf

@@ -0,0 +1,78 @@
+# Fail2Ban configuration file
+#
+# Author: Daniel Black
+#
+# This is for ipset protocol 6 (and hopefully later) (ipset v6.14).
+# Use ipset -V to see the protocol and version. Version 4 should use
+# iptables-ipset-proto4.conf.
+#
+# This requires the program ipset which is normally in package called ipset.
+#
+# IPset was a feature introduced in the linux kernel 2.6.39 and 3.0.0 kernels.
+#
+# If you are running on an older kernel you make need to patch in external
+# modules.
+#
+# On Debian machines this can be done with:
+#
+# apt-get install ipset xtables-addons-source 
+# module-assistant auto-install xtables-addons
+
+[Definition]
+
+# Option:  actionstart
+# Notes.:  command executed once at the start of Fail2Ban.
+# Values:  CMD
+#
+actionstart = ipset create fail2ban-<name> hash:ip timeout <bantime>
+              iptables -I INPUT -p <protocol> -m multiport --dports <port> -m set --match-set fail2ban-<name> src -j DROP
+
+# Option:  actionstop
+# Notes.:  command executed once at the end of Fail2Ban
+# Values:  CMD
+#
+actionstop = iptables -D INPUT -p <protocol> -m multiport --dports <port> -m set --match-set fail2ban-<name> src -j DROP
+             ipset flush fail2ban-<name>
+             ipset destroy fail2ban-<name>
+
+# Option:  actionban
+# Notes.:  command executed when banning an IP. Take care that the
+#          command is executed with Fail2Ban user rights.
+# Tags:    <ip>  IP address
+# Values:  CMD
+#
+actionban = ipset add fail2ban-<name> <ip> timeout <bantime> -exist
+
+# Option:  actionunban
+# Notes.:  command executed when unbanning an IP. Take care that the
+#          command is executed with Fail2Ban user rights.
+# Tags:    <ip>  IP address
+# Values:  CMD
+#
+actionunban = ipset del fail2ban-<name> <ip> -exist
+
+[Init]
+
+# Defaut name of the ipset
+#
+name = default
+
+# Option:  port
+# Notes.:  specifies port to monitor
+# Values:  [ NUM | STRING ]  Default: ssh
+#
+port = ssh
+
+# Option:  protocol
+# Notes.:  internally used by config reader for interpolations.
+# Values:  [ tcp | udp | icmp | all ] Default: tcp
+#
+protocol = tcp
+
+# Option: bantime
+# Notes:  specifies the bantime in seconds (handled internally rather than by fail2ban)
+# Values:  [ NUM ]  Default: 600
+
+bantime = 600
+
+

config/jail.conf

@@ -101,6 +101,26 @@ action      = hostsdeny
 ignoreregex = for myuser from
 logpath     = /var/log/sshd.log
 
+# Here we use a combination of Netfilter/Iptables and IPsets
+# for storing large volumes of banned IPs
+#
+# IPset comes in two versions. See ipset -V for which one to use
+# requires the ipset package and kernel support.
+[ssh-iptables-ipset4]
+
+enabled  = false
+filter   = sshd
+action   = iptables-ipset-proto4[name=SSH, port=ssh, protocol=tcp]
+logpath  = /var/log/sshd.log
+maxretry = 5
+
+[ssh-iptables-ipset6]
+enabled  = false
+filter   = sshd
+action   = iptables-ipset-proto6[name=SSH, port=ssh, protocol=tcp, bantime=600]
+logpath  = /var/log/sshd.log
+maxretry = 5
+
 # This jail demonstrates the use of wildcards in "logpath".
 # Moreover, it is possible to give other files on a new line.