I've been trying to get fail2ban to work with the Xeams email spam filter. But, I can't figure out what possible regex I should use to match the logs. The logs are in this format.
188.8.131.52 1451702136946 5 184.108.40.206 1451702444872 5 220.127.116.11 1451705774912 5 18.104.22.168 1451712868825 5
Each section of the log is separated by a Tab (I think), with the first part being the host IP. I have no idea what the other sections do.
I've tried the following regex but it doesn't work according to fail2ban-regex.
<HOST> 1451.* .*
As well as:
<HOST> .* .*
I honestly have no idea what to do to match these logs.