I have a VPS that hosts around 20 websites. Recently a spammer has been hammering my server.
I installed fail2ban to control the issue, which has worked well. However looking in the log it appears all the IP addresses are listed on DNSBL.
So I think it would make more sense to enable DNSBL with postfix.
However I'm a CentOS newbie, so need a lot of help.
I have root SSH access and YUM installed.
Could someone walk me through the process?
I tried adding a couple of lines to my main.cf as per this guide, but fail2ban is still picking up loads of IP's that are on the DNSBL, so should bet getting through
Many thanks in adv.