163 lines
4.7 KiB
Plaintext
163 lines
4.7 KiB
Plaintext
# Fail2Ban configuration file
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#
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# Authors: Sergey G. Brester (sebres), Cyril Jaquier, Daniel Black,
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# Yaroslav O. Halchenko, Alexander Koeppe et al.
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#
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[Definition]
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# Option: type
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# Notes.: type of the action.
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# Values: [ oneport | multiport | allports ] Default: oneport
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#
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type = oneport
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# Option: actionflush
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# Notes.: command executed once to flush IPS, by shutdown (resp. by stop of the jail or this action)
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# Values: CMD
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#
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actionflush = <iptables> -F f2b-<name>
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# Option: actionstart
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# Notes.: command executed on demand at the first ban (or at the start of Fail2Ban if actionstart_on_demand is set to false).
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# Values: CMD
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#
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actionstart = { <iptables> -C f2b-<name> -j <returntype> >/dev/null 2>&1; } || { <iptables> -N f2b-<name> || true; <iptables> -A f2b-<name> -j <returntype>; }
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<_ipt_add_rules>
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# Option: actionstop
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# Notes.: command executed at the stop of jail (or at the end of Fail2Ban)
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# Values: CMD
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#
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actionstop = <_ipt_del_rules>
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<actionflush>
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<iptables> -X f2b-<name>
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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 = <_ipt_check_rules>
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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 f2b-<name> 1 -s <ip> -j <blocktype>
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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 f2b-<name> -s <ip> -j <blocktype>
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# Option: pre-rule
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# Notes.: prefix parameter(s) inserted to the begin of rule. No default (empty)
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#
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pre-rule =
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rule-jump = -j <_ipt_rule_target>
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# Several capabilities used internaly:
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_ipt_for_proto-iter = for proto in $(echo '<protocol>' | sed 's/,/ /g'); do
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_ipt_for_proto-done = done
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_ipt_add_rules = <_ipt_for_proto-iter>
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{ %(_ipt_check_rule)s >/dev/null 2>&1; } || { <iptables> -I <chain> %(_ipt_chain_rule)s; }
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<_ipt_for_proto-done>
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_ipt_del_rules = <_ipt_for_proto-iter>
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<iptables> -D <chain> %(_ipt_chain_rule)s
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<_ipt_for_proto-done>
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_ipt_check_rules = <_ipt_for_proto-iter>
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%(_ipt_check_rule)s
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<_ipt_for_proto-done>
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_ipt_chain_rule = <pre-rule><ipt_<type>/_chain_rule>
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_ipt_check_rule = <iptables> -C <chain> %(_ipt_chain_rule)s
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_ipt_rule_target = f2b-<name>
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[ipt_oneport]
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_chain_rule = -p $proto --dport <port> <rule-jump>
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[ipt_multiport]
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_chain_rule = -p $proto -m multiport --dports <port> <rule-jump>
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[ipt_allports]
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_chain_rule = -p $proto <rule-jump>
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[Init]
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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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# 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: 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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# Option: returntype
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# Note: This is the default rule on "actionstart". This should be RETURN
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# in all (blocking) actions, except REJECT in allowing actions.
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# Values: STRING
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returntype = RETURN
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# Option: lockingopt
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# Notes.: Option was introduced to iptables to prevent multiple instances from
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# running concurrently and causing irratic behavior. -w was introduced
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# in iptables 1.4.20, so might be absent on older systems
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# See https://github.com/fail2ban/fail2ban/issues/1122
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# Values: STRING
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lockingopt = -w
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# Option: iptables
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# Notes.: Actual command to be executed, including common to all calls options
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# Values: STRING
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iptables = iptables <lockingopt>
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[Init?family=inet6]
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# Option: blocktype (ipv6)
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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 icmp6-port-unreachable
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# Values: STRING
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blocktype = REJECT --reject-with icmp6-port-unreachable
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# Option: iptables (ipv6)
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# Notes.: Actual command to be executed, including common to all calls options
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# Values: STRING
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iptables = ip6tables <lockingopt>
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