https://github.com/fail2ban/fail2ban/issues/44
2012/4/27 Bob Hoffman <bob@xxxxxxxxxxxxxx>:
> I got the fail2ban from epel.
> There were a number of issues relating to using a log file...
> logwatch was looking for both fail2ban and fail2ban.log
> logrotate file fail2ban added looked for fail2ban.log and then reset
> itself to syslog
> fail2ban itself went to syslog, over riding its fail2ban.log.
>
> took a while, but I use /var/log/fail2ban now, that finally worked
> through logrotates and logwatch.
>
> Problem with centos variant of fail2ban:
>
> logrotate causes all 'ban' actions to stop happening. I am pretty sure
> it stops reading the logs but still functions.
> Unban actions still keep showing up in the log, but the 'ban' actions
> just stop. Program is running, but no longer working.
>
> Long searches online show a million others with the same issue. Only way
> to prevent it seems to be to add a reload or restart in the syslog file.
> This is undesired due to losing all banned ips listed.
>
> It happens as part of the logrotate. The logrotate file I have changed a
> few times and recently tried this
> postrotate
> /usr/bin/fail2ban-client set logtarget /var/log/fail2ban
> 1>/dev/null || true
> endscript
>
> setting the logtarget, which the original called for changing it to
> syslog and 2>dev/null || true
>
>
> so what would you do? I imagine when logrotate happens and syslog
> restarts something is causing fail2ban to stop working properly, but
> still timing 'unbans'.
>
> This is apparently a bug/problem for almost everyone of all distros.
> Other than just uninstalling, the only way to make it work would be a
> restart around 4 every morning, making any long term bans useless.
>
> My last thought is to just throw the /var/log/fail2ban to be rotated by
> syslog like maillog and the others..and not doing anything special.
> Maybe it would just work.
>
> I write here because I know there are hundreds of you and someone must
> have figured out how to make fail2ban work for more than 24 hours
> without a restart....
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