I'm trying to jail hosts that brute-force attack a web server, thereby creating (hundreds of) lines in
/var/log/apache2/error.log of the form
[Fri Feb 01 11:17:56.158739 2019] [:error] [pid 15870] [client 188.8.131.52:19920] script '/var/www/html/hello.php' not found or unable to stat
[INCLUDES] before = apache-common.conf [Definition] failregex = ^%(_apache_error_client)s .* not found or unable to stat %(_apache_error_client)s [client (?P<host>\S*)]
fail2ban-regex /var/log/apache2/error.log foo.conf reports zero matches for all three of these broader and broader regexes (but no errors or warnings, though.) So
fail2ban-client status foo predictably reports no jailings. I can't broaden the regexes any further, without the error
No 'host' group in '<host>'. I've derived these regexes from fail2ban's own
What is a regex that can at least match every line in error.log, as I expected the second and third regex to? Then I can expand that to more precisely match my particular lines.
(And shouldn't the
apache-noscript filter be jailing these hosts, anyways? Its failregex
^%(_apache_error_client)s script '/\S*(\.php|\.asp|\.exe|\.pl)\S*' not found or unable to stat\s*$) might match my lines.
Ubuntu 14.04, fail2ban v0.8.11.
Edit: Related, I'm trying to catch brute force against /xmlrpc.php with fail2ban. This seems to be called an "xmlrpc attack."