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96 lines
3.2 KiB
Plaintext
96 lines
3.2 KiB
Plaintext
## Version 2022/08/06
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# Fail2Ban configuration file
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#
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# Author: Nick Munger
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# Modified by: Ken Menzel
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# Daniel Black (start/stop)
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# Fabian Wenk (many ideas as per fail2ban users list)
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#
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# Ensure firewall_enable="YES" in the top of /etc/rc.conf
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#
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[Definition]
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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 = ipfw show | fgrep -c -m 1 -s 'table(<table>)' > /dev/null 2>&1 || (
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num=$(ipfw show | awk 'BEGIN { b = <lowest_rule_num> } { if ($1 == b) { b = $1 + 1 } } END { print b }');
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ipfw -q add "$num" <blocktype> <block> from table\(<table>\) to me <port>; echo "$num" > "<startstatefile>"
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)
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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 = [ ! -f <startstatefile> ] || ( read num < "<startstatefile>" <br> ipfw -q delete $num <br> rm "<startstatefile>" )
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# Option: actioncheck
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# Notes.: command executed once before each actionban command
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# Values: CMD
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#
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actioncheck =
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# Option: actionban
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# Notes.: command executed when banning an IP. Take care that the
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# command is executed with Fail2Ban user rights.
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# Tags: See jail.conf(5) man page
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# Values: CMD
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#
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# requires an ipfw rule like "deny ip from table(1) to me"
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actionban = e=`ipfw table <table> add <ip> 2>&1`; x=$?; [ $x -eq 0 -o "$e" = 'ipfw: setsockopt(IP_FW_TABLE_XADD): File exists' ] || echo "$e" | grep -q "record already exists" || { echo "$e" 1>&2; exit $x; }
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# Option: actionunban
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# Notes.: command executed when unbanning an IP. Take care that the
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# command is executed with Fail2Ban user rights.
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# Tags: See jail.conf(5) man page
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# Values: CMD
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#
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actionunban = e=`ipfw table <table> delete <ip> 2>&1`; x=$?; [ $x -eq 0 -o "$e" = 'ipfw: setsockopt(IP_FW_TABLE_XDEL): No such process' ] || echo "$e" | grep -q "record not found" || { echo "$e" 1>&2; exit $x; }
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[Init]
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# Option: table
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# Notes: The ipfw table to use. If a ipfw rule using this table already exists,
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# this action will not create a ipfw rule to block it and the following
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# options will have no effect.
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# Values: NUM
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table = 1
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# Option: port
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# Notes.: Specifies port to monitor. Blank indicate block all ports.
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# Values: [ NUM | STRING ]
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#
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port =
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# Option: startstatefile
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# Notes: A file to indicate that the table rule that was added. Ensure it is unique per table.
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# Values: STRING
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startstatefile = /var/run/fail2ban/ipfw-started-table_<table>
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# Option: block
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# Notes: This is how much to block.
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# Can be "ip", "tcp", "udp" or various other options.
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# Values: STRING
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block = ip
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# Option: blocktype
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# Notes.: How to block the traffic. Use a action from man 5 ipfw
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# Common values: deny, unreach port, reset
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# ACTION defination at the top of man ipfw for allowed values.
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# Values: STRING
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#
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blocktype = unreach port
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# Option: lowest_rule_num
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# Notes: When fail2ban starts with action and there is no rule for the given table yet
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# then fail2ban will start looking for an empty slot starting with this rule number.
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# Values: NUM
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lowest_rule_num = 111
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