Hi, I'm using F2B 0.11.0.3 on FreeBSD 12.1.0.4. F2B is set up to create/use tables in ipfw to write banned IP's to the tables.
This is working for every rule _except_ for the 'recidive' rule. I don't
know where the error is.
This is a snippet of my jail.conf:
---
[DEFAULT]
block= %(protocol)s
table=1
banaction = bsd-ipfw
action_ = %(banaction)s[name=%(__name__)s, port="%(port)s",
protocol="%(protocol)s", chain="%(chain)s", table="%(table)s",
block="%(block)s"]
action_xarf = %(banaction)s[name=%(__name__)s, port="%(port)s",
protocol="%(protocol)s", chain="%(chain)s", table="%(table)s",
block="%(block)s"]
xarf-login-attack[service=%(__name__)s,
sender="%(sender)s", logpath=%(logpath)s, port="%(port)s"]
[bsd-sshd]
port = ssh
logpath = %(sshd_log)s
backend = %(sshd_backend)s
enabled = true
filter = bsd-sshd[mode=aggressive]
# Ban IP and report to AbuseIPDB for SSH Brute-Forcing
action = %(action_)s
%(action_abuseipdb)s[abuseipdb_category="18,22"]
maxretry = 3
table = 22
[recidive]
logpath = /mnt/XigmaNAS_Maindisk/var/log/fail2ban.log*
bantime = 604800 ; 1 week
findtime = 3w ; 1 day
action = %(action_xarf)s
enabled = true
maxretry = 10
table = 4711
---
bsd-sshd is using table 22, but recidive isn't creating any table. It
puts every banned IP as a single rule to ipfw.
Ah, my bsd-ipfw.conf:
---
# Fail2Ban configuration file
#
# Author: Nick Munger
# Modified by: Ken Menzel
# Daniel Black (start/stop)
# Fabian Wenk (many ideas as per fail2ban users list)
#
# Ensure firewall_enable="YES" in the top of /etc/rc.conf
#
[Definition]
# 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 = ipfw show | fgrep -c -m 1 -s 'table(<table>)' > /dev/null
2>&1 || ( ipfw show | awk 'BEGIN { b = <lowest_rule_num> } { if ($1 < b)
{} else if ($1 == b) { b = $1 + 1 } else { e = b } } END { if (e) exit e
<br> else exit b }'; num=$?; ipfw -q add $num <blocktype> <block> from
table\(<table>\) to any <port>; echo $num > "<startstatefile>" )
# Option: actionstop
# Notes.: command executed at the stop of jail (or at the end of Fail2Ban)
# Values: CMD
#
actionstop = [ ! -f <startstatefile> ] || ( read num <
"<startstatefile>" <br> ipfw -q delete $num <br> rm "<startstatefile>" )
# Option: actioncheck
# Notes.: command executed once before each actionban command
# Values: CMD
#
actioncheck =
# Option: actionban
# Notes.: command executed when banning an IP. Take care that the
# command is executed with Fail2Ban user rights.
# Tags: See jail.conf(5) man page
# Values: CMD
#
# requires an ipfw rule like "deny ip from table(1) to me"
actionban = e=`ipfw table <table> add <ip> 2>&1`; x=$?; [ $x -eq 0 -o
"$e" = 'ipfw: setsockopt(IP_FW_TABLE_XADD): File exists' ] || echo "$e"
| grep -q "record already exists" || { echo "$e" 1>&2; exit $x; }
# Option: actionunban
# Notes.: command executed when unbanning an IP. Take care that the
# command is executed with Fail2Ban user rights.
# Tags: See jail.conf(5) man page
# Values: CMD
#
actionunban = e=`ipfw table <table> delete <ip> 2>&1`; x=$?; [ $x -eq 0
-o "$e" = 'ipfw: setsockopt(IP_FW_TABLE_XDEL): No such process' ] ||
echo "$e" | grep -q "record not found" || { echo "$e" 1>&2; exit $x; }
[Init]
# Option: table
# Notes: The ipfw table to use. If a ipfw rule using this table
already exists,
# this action will not create a ipfw rule to block it and the
following
# options will have no effect.
# Values: NUM
table = 1
# Option: port
# Notes.: Specifies port to monitor. Blank indicate block all ports.
# Values: [ NUM | STRING ]
#
port =
# Option: startstatefile
# Notes: A file to indicate that the table rule that was added. Ensure
it is unique per table.
# Values: STRING
startstatefile = /var/run/fail2ban/ipfw-started-table_<table>
# Option: block
# Notes: This is how much to block.
# Can be "ip", "tcp", "udp" or various other options.
# Values: STRING
block = tcp
# Option: blocktype
# Notes.: How to block the traffic. Use a action from man 5 ipfw
# Common values: deny, unreach port, reset
# ACTION defination at the top of man ipfw for allowed values.
# Values: STRING
#
blocktype = unreach port
#blocktype = deny
# Option: lowest_rule_num
# Notes: When fail2ban starts with action and there is no rule for the
given table yet
# then fail2ban will start looking for an empty slot starting
with this rule number.
# Values: NUM
lowest_rule_num = 111
---
Do you need more info or do you have a hint where the error is?
Greeting
Florian
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