Something changed at some point since Fedora 11, and now some messages from userspace daemons include kernel timestamps in their syslog text, e.g. Sep 25 12:51:04 myhost kernel: [773580.832329] sshd[25557]: Invalid user pgsql from 91.203.223.206 Unfortunately fail2ban does not recognise this extra 'kernel: \[\d+\.\d+\]' text, which means that it fails to detect sshd brute force attacks, and probably many other kinds of attacks. Seen on Fedora 15 with fail2ban-0.8.4-27.fc15.noarch Steps to Reproduce: 1. Install fail2ban on F15 2. Configure sshd jail and start fail2ban service 3. Simulate sshd attack by ssh'ing to machine with non-existent user names multiple times Actual results: fail2ban takes no action Expected results: fail2ban should ban IP from which ssh attempts originate. I have submitted a bug and patch upstream (sourceforge) to fix this: https://sourceforge.net/tracker/?func=detail&aid=3413745&group_id=121032&atid=689044 https://sourceforge.net/tracker/?func=detail&aid=3413746&group_id=121032&atid=689046 but it doesn't look like fail2ban's sourceforge project is being maintained very actively. On github I found a more active git-svn clone of the sourceforge svn repo, forked that, and patched it: https://github.com/aspiers/Fail2Ban/commit/bdbb36434647a7c34b084ff7bf4f8ab31f846d3e
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