Hello list. I have a question for fail2ban for bad logins on sasl. I use sasl, sendmail and cyrus-imapd. In jail.conf I use the following syntax:
[sasl-iptables]
enabled = true filter = sasl backend = polling action = iptables[name=sasl, port=smtp, protocol=tcp] sendmail-whois[name=sasl, dest=my@email] logpath = /var/log/maillog maxretry = 6
and the following filter:
failregex = (?i): warning: [-._\w]+[<HOST>]: SASL (?:LOGIN|PLAIN|(?:CRAM|DIGEST)-MD5) authentication failed(: [A-Za-z0-9+/]*={0,2})?$
in iptables:
fail2ban-sasl tcp -- anywhere anywhere tcp dpt:smtp ...
Chain fail2ban-sasl (2 references) target prot opt source destination RETURN all -- anywhere anywhere
The problem is that never ban bad logins.
I tried to change action as port="imap,imaps,pop3,pop3s,smtp" but nothing change.
Can somebody help me?
Thank you, Nikos