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# Fail2Ban configuration file
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#
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# Author: Guido Bozzetto
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# Modified: Cyril Jaquier
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#
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# make "fail2ban-<name>" chain to match drop IP
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# make "fail2ban-<name>-log" chain to log and drop
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# insert a jump to fail2ban-<name> from -I <chain> if proto/port match
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#
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#
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[INCLUDES]
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before = iptables-blocktype.conf
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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 = iptables -N fail2ban-<name>
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iptables -A fail2ban-<name> -j RETURN
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iptables -I <chain> 1 -p <protocol> -m multiport --dports <port> -j fail2ban-<name>
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iptables -N fail2ban-<name>-log
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iptables -I fail2ban-<name>-log -j LOG --log-prefix "$(expr fail2ban-<name> : '\(.\{1,23\}\)'):DROP " --log-level warning -m limit --limit 6/m --limit-burst 2
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iptables -A fail2ban-<name>-log -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 <chain> -p <protocol> -m multiport --dports <port> -j fail2ban-<name>
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iptables -F fail2ban-<name>
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iptables -F fail2ban-<name>-log
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iptables -X fail2ban-<name>
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iptables -X fail2ban-<name>-log
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# Option: actioncheck
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# Notes.: command executed once before each actionban command
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# Values: CMD
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#
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actioncheck = iptables -n -L fail2ban-<name>-log >/dev/null
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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 = iptables -I fail2ban-<name> 1 -s <ip> -j fail2ban-<name>-log
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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 = iptables -D fail2ban-<name> -s <ip> -j fail2ban-<name>-log
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[Init]
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# Default name of the chain
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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:
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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: chain
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# Notes specifies the iptables chain to which the fail2ban rules should be
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# added
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# Values: STRING Default: INPUT
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chain = INPUT
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