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-# Fail2Ban configuration file
-#
-# Author: Daniel Black
-# Author: Cyril Jaquier
-# Modified: Yaroslav O. Halchenko <debian@onerussian.com>
-# made active on all ports from original iptables.conf
-# Modified: Alexander Belykh <albel727@ngs.ru>
-# adapted for nftables
-#
-# This is a included configuration file and includes the definitions for the nftables
-# used in all nftables based actions by default.
-#
-# The user can override the defaults in nftables-common.local
-# Example: redirect flow to honeypot
-#
-# [Init]
-# table_family = ip
-# chain_type = nat
-# chain_hook = prerouting
-# chain_priority = -50
-# blocktype = counter redirect to 2222
-
-[INCLUDES]
-
-after = nftables-common.local
-
-[Definition]
-
-# Option: type
-# Notes.: type of the action.
-# Values: [ multiport | allports ] Default: multiport
-#
-type = multiport
-
-rule_match-custom =
-rule_match-allports = meta l4proto \{ <protocol> \}
-rule_match-multiport = $proto dport \{ $(echo '<port>' | sed s/:/-/g) \}
-match = <rule_match-<type>>
-
-# Option: rule_stat
-# Notes.: statement for nftables filter rule.
-# leaving it empty will block all (include udp and icmp)
-# Values: nftables statement
-#
-rule_stat = %(match)s <addr_family> saddr @<addr_set> <blocktype>
-
-# optional iterator over protocol's:
-_nft_for_proto-custom-iter =
-_nft_for_proto-custom-done =
-_nft_for_proto-allports-iter =
-_nft_for_proto-allports-done =
-_nft_for_proto-multiport-iter = for proto in $(echo '<protocol>' | sed 's/,/ /g'); do
-_nft_for_proto-multiport-done = done
-
-_nft_list = <nftables> -a list chain <table_family> <table> <chain>
-_nft_get_handle_id = grep -oP '@<addr_set>\s+.*\s+\Khandle\s+(\d+)$'
-
-_nft_add_set = <nftables> add set <table_family> <table> <addr_set> \{ type <addr_type>\; flags interval\; \}
- <_nft_for_proto-<type>-iter>
- <nftables> add rule <table_family> <table> <chain> %(rule_stat)s
- <_nft_for_proto-<type>-done>
-_nft_del_set = { %(_nft_list)s | %(_nft_get_handle_id)s; } | while read -r hdl; do
- <nftables> delete rule <table_family> <table> <chain> $hdl; done
- <nftables> delete set <table_family> <table> <addr_set>
-
-# Option: _nft_shutdown_table
-# Notes.: command executed after the stop in order to delete table (it checks that no sets are available):
-# Values: CMD
-#
-_nft_shutdown_table = { <nftables> list table <table_family> <table> | grep -qP '^\s+set\s+'; } || {
- <nftables> delete table <table_family> <table>
- }
-
-# Option: actionstart
-# Notes.: command executed on demand at the first ban (or at the start of Fail2Ban if actionstart_on_demand is set to false).
-# Values: CMD
-#
-actionstart = <nftables> add table <table_family> <table>
- <nftables> -- add chain <table_family> <table> <chain> \{ type <chain_type> hook <chain_hook> priority <chain_priority> \; \}
- %(_nft_add_set)s
-
-# Option: actionflush
-# Notes.: command executed once to flush IPS, by shutdown (resp. by stop of the jail or this action);
-# uses `nft flush set ...` and as fallback (e. g. unsupported) recreates the set (with references)
-# Values: CMD
-#
-actionflush = { <nftables> flush set <table_family> <table> <addr_set> 2> /dev/null; } || {
- %(_nft_del_set)s
- %(_nft_add_set)s
- }
-
-# Option: actionstop
-# Notes.: command executed at the stop of jail (or at the end of Fail2Ban)
-# Values: CMD
-#
-actionstop = %(_nft_del_set)s
- <_nft_shutdown_table>
-
-# Option: actioncheck
-# Notes.: command executed once before each actionban command
-# Values: CMD
-#
-actioncheck = <nftables> list chain <table_family> <table> <chain> | grep -q '@<addr_set>[ \t]'
-
-# Option: actionban
-# Notes.: command executed when banning an IP. Take care that the
-# command is executed with Fail2Ban user rights.
-# Tags: See jail.conf(5) man page
-# Values: CMD
-#
-actionban = <nftables> add element <table_family> <table> <addr_set> \{ <ip> \}
-
-# Option: actionunban
-# Notes.: command executed when unbanning an IP. Take care that the
-# command is executed with Fail2Ban user rights.
-# Tags: See jail.conf(5) man page
-# Values: CMD
-#
-actionunban = <nftables> delete element <table_family> <table> <addr_set> \{ <ip> \}
-
-[Init]
-
-# Option: table
-# Notes.: main table to store chain and sets (automatically created on demand)
-# Values: STRING Default: f2b-table
-table = f2b-table
-
-# Option: table_family
-# Notes.: address family to work in
-# Values: [ip | ip6 | inet] Default: inet
-table_family = inet
-
-# Option: chain
-# Notes.: main chain to store rules
-# Values: STRING Default: f2b-chain
-chain = f2b-chain
-
-# Option: chain_type
-# Notes.: refers to the kind of chain to be created
-# Values: [filter | route | nat] Default: filter
-#
-chain_type = filter
-
-# Option: chain_hook
-# Notes.: refers to the kind of chain to be created
-# Values: [ prerouting | input | forward | output | postrouting ] Default: input
-#
-chain_hook = input
-
-# Option: chain_priority
-# Notes.: priority in the chain.
-# Values: NUMBER Default: -1
-#
-chain_priority = -1
-
-# Option: addr_type
-# Notes.: address type to work with
-# Values: [ipv4_addr | ipv6_addr] Default: ipv4_addr
-#
-addr_type = ipv4_addr
-
-# Default name of the filtering set
-#
-name = default
-
-# Option: port
-# Notes.: specifies port to monitor
-# Values: [ NUM | STRING ] Default:
-#
-port = ssh
-
-# Option: protocol
-# Notes.: internally used by config reader for interpolations.
-# Values: [ tcp | udp ] Default: tcp
-#
-protocol = tcp
-
-# Option: blocktype
-# Note: This is what the action does with rules. This can be any jump target
-# as per the nftables man page (section 8). Common values are drop,
-# reject, reject with icmpx type host-unreachable, redirect to 2222
-# Values: STRING
-blocktype = reject
-
-# Option: nftables
-# Notes.: Actual command to be executed, including common to all calls options
-# Values: STRING
-nftables = nft
-
-# Option: addr_set
-# Notes.: The name of the nft set used to store banned addresses
-# Values: STRING
-addr_set = addr-set-<name>
-
-# Option: addr_family
-# Notes.: The family of the banned addresses
-# Values: [ ip | ip6 ]
-addr_family = ip
-
-[Init?family=inet6]
-addr_family = ip6
-addr_type = ipv6_addr
-addr_set = addr6-set-<name>