Comment 78 for bug 2055114

Note that fail2ban is in universe, not main. This was surprising to me, and something I only realized because of this bug. I too think of fail2ban as a core security component. I wish Ubuntu would promote it to main, but that's a different conversation.

Traditionally, being in universe has meant that support is "best effort". In my opinion, that was generally security/CVE support at most. Canonical has recently announced expanded support of packages in universe, which is great. However, I share your concern that they may not be able to keep up with all of the packages in universe. Time will tell.