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# Fail2Ban configuration file
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#
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# Author: Daniel Black
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#
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# This is for ipset protocol 4 (ipset v4.2). If you have a later version
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# of ipset try to use the iptables-ipset-proto6.conf as it does some things
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# nicer.
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#
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# This requires the program ipset which is normally in package called ipset.
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#
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# IPset was a feature introduced in the linux kernel 2.6.39 and 3.0.0 kernels.
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#
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# If you are running on an older kernel you make need to patch in external
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# modules.
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#
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# On Debian machines this can be done with:
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#
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# apt-get install ipset xtables-addons-source
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# module-assistant auto-install xtables-addons
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[Definition]
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# Option: actionstart
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# Notes.: command executed once at the start of Fail2Ban.
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# Values: CMD
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#
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actionstart = ipset --create fail2ban-<name> iphash
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iptables -I INPUT -p <protocol> -m multiport --dports <port> -m set --match-set fail2ban-<name> src -j <blocktype>
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# Option: actionstop
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# Notes.: command executed once at the end of Fail2Ban
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# Values: CMD
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#
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actionstop = iptables -D INPUT -p <protocol> -m multiport --dports <port> -m set --match-set fail2ban-<name> src -j <blocktype>
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ipset --flush fail2ban-<name>
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ipset --destroy fail2ban-<name>
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# Option: actionban
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# Notes.: command executed when banning an IP. Take care that the
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# command is executed with Fail2Ban user rights.
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# Tags: See jail.conf(5) man page
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# Values: CMD
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#
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actionban = ipset --test fail2ban-<name> <ip> || ipset --add fail2ban-<name> <ip>
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# Option: actionunban
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# Notes.: command executed when unbanning an IP. Take care that the
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# command is executed with Fail2Ban user rights.
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# Tags: See jail.conf(5) man page
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# Values: CMD
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#
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actionunban = ipset --test fail2ban-<name> <ip> && ipset --del fail2ban-<name> <ip>
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[Init]
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# Default name of the ipset
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#
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name = default
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# Option: port
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# Notes.: specifies port to monitor
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# Values: [ NUM | STRING ] Default: ssh
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#
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port = ssh
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# Option: protocol
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# Notes.: internally used by config reader for interpolations.
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# Values: [ tcp | udp | icmp | all ] Default: tcp
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#
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protocol = tcp
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# Option: blocktype
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# Note: This is what the action does with rules. This can be any jump target
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# as per the iptables man page (section 8). Common values are DROP
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# REJECT, REJECT --reject-with icmp-port-unreachable
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# Values: STRING
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blocktype = REJECT --reject-with icmp-port-unreachable
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