I'm managing a virtual machine that some predecessor has set up. If I try to logon and enter the wrong password three times in a row my current IP gets banned for a lengthy time (some 30 minutes at least). I'm trying to change this behavior but I've got no clue whatsoever where to even begin. Fail2ban is installed but it's not running. pam_tally2 exists but is not mentioned in "/etc/pam.d/sshd". How can I find out which tool performs the blacklisting in order to configure it?
Version is "CentOS release 5.9 (Final)"