Apache httpd server 'is it possible': Alert on specific condition in access/error log

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http://serverfault.com – I'm just wondering is it there some module which can detect certain event in access/error log and if it matches it, to send an email with information. example: I want to detect when someone makes requests like this : www.mysite.com/../../../etc/passwd or similar. I want to be informed via email when it happens. Thanks in advance. (HowTos)