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I want to block the following entries in the /var/log/apache/access.log with fail2ban. How should I set my failregex? - - [05/Mar/2007:11:50:20 +0100] "GET HTTP/1.0" 404 534 "-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)"

Thanks in advance!

Regards, Ronald

This failregex should do it (with 0.7.x):

failregex = ^<HOST> -.*GET.*/ip\.cgi

--Lostcontrol 12:32, 6 March 2007 (CET)

I want to block Trackback-Spambots whcih are causing gigabytes of incoming traffic due to requests every day, but I'm pretty bad in regexp and can't get it to work. Entries look like this and are recognizable by the UserAgent string "Trackback/1.02":

www.mydomain.tld||||459|||| - - [05/Mar/2007:14:39:21 +0100] "POST /123.html/trackback/ HTTP/1.0" 301 459 "http://www.mydomain.tld/123.html/trackback" "TrackBack/1.02"

Apach2's log format looks like this:

LogFormat "%v||||%b||||%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined_ispconfig

Regards, Alexander Langer

Yaroslav Halchenko has created a filter in order to ban such bots. This filter will be in the next release. A list of "bad bots" is available here. You can get the filter from Subversion here. However, "Trackback" is not in the list. You should be able to add it without any problems. --Lostcontrol 12:20, 6 March 2007 (CET)

I changed lines to badbotscustom = EmailCollector|WebEMailExtrac|TrackBack/1\.02 and to failregex = ^(?P<host>\S*) -.*"POST.*HTTP.*"(?:%(badbots)s|%(badbotscustom)s)"$ and did a fail2ban-regex myLogfile apache-badbots.conf but all it says is "Sorry, no match". I am using v0.7.5 on Debian.

Regards, Alexander Langer 12:55, 6 March 2007 (CET)

Try this failregex:

failregex = .*\|<HOST> -.*"POST.*HTTP.*"TrackBack/1\.02"$

Tested with fail2ban-regex 0.7.7 with your log line. Could you use the mailing-list for such question the next time? Thank you. --Lostcontrol 22:24, 7 March 2007 (CET)