Hi,
I'm trying to use fail2ban with iptables because it's what I'm most
comfortable using and this is on a real server with an extensive list
of rules, not a home desktop.
I have the following in my jail.d/00-firewalld.conf:
banaction = iptables
banaction_allports = iptables[type=allports]
On restarting fail2ban, it produces the following errors:
2021-07-15 22:01:50,070 fail2ban.actions [2047644]: NOTICE
[postfix] Ban 212.70.149.71
2021-07-15 22:01:50,088 fail2ban.utils [2047644]: ERROR
7fad2804c3f0 -- exec: iptables -w -N f2b-postfix iptables -w -A
f2b-postfix -j RETURN
iptables -w -I INPUT -p tcp --dport smtp,465,submission -j f2b-postfix
2021-07-15 22:01:50,088 fail2ban.utils [2047644]: ERROR
7fad2804c3f0 -- stderr: "iptables v1.8.5 (legacy): invalid
port/service `smtp,465,submission' specified"
2021-07-15 22:01:50,089 fail2ban.utils [2047644]: ERROR
7fad2804c3f0 -- stderr: "Try `iptables -h' or 'iptables --help' for
more information."
2021-07-15 22:01:50,089 fail2ban.utils [2047644]: ERROR
7fad2804c3f0 -- returned 2
2021-07-15 22:01:50,089 fail2ban.actions [2047644]: ERROR
Failed to execute ban jail 'postfix' action 'iptables' info
'ActionInfo({'ip': '212.70.149.71', 'family': 'inet4', 'fid':
<function Actions.ActionInfo.<lambda> at 0x7fad28111280>,
'raw-ticket': <function Actions.ActionInfo.<lambda> at
0x7fad28111940>})': Error starting action Jail('postfix')/iptables:
'Script error'
2021-07-15 22:01:50,110 fail2ban.actions [2047644]: NOTICE
[postfix-sasl] Ban 24.249.23.200
2021-07-15 22:01:50,125 fail2ban.utils [2047644]: ERROR
7fad0c362e30 -- exec: iptables -w -N f2b-postfix-sasl
This is with the default postfix.conf. Here are my jail.conf settings:
[postfix]
# To use another modes set filter parameter "mode" in jail.local:
mode = aggressive
#mode = more
port = smtp,465,submission
logpath = %(postfix_log)s
backend = %(postfix_backend)s
maxretry = 3
findtime = 24h
bantime = 1h
enabled = true
[postfix-rbl]
filter = postfix[mode=rbl]
port = smtp,465,submission
logpath = %(postfix_log)s
backend = %(postfix_backend)s
maxretry = 3
findtime = 24h
bantime = 1h
enabled = true
What am I doing wrong? Is fail2ban no longer capable of supporting iptables?
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