I just implemented
fail2ban on a server for testing purposes. I have a BLACKLIST chain which blocks a huge set of CIDR masks that I don't want to reach my server. When
fail2ban is triggered by a bruteforce attack, it does add the offending IP address properly, however it flushes out my BLACkLIST chain, which I need to keep intact.
Any thoughts on why this is happening and how I can persist the BLACKLIST chain?