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Prefiltering log events with rsyslog to greatly reduce fail2ban CPU load

Posted on 26. November 2016 by Bjoern Leave a comment

Assume you have a service (web, mail, lb etc.) and you want to watch the logs of this service with fail2ban and take actions if specific log patterns occur. If your service is busy and have a high log volume/high log traffic, fail2ban can quickly eats up much cpu while trying to match regular expressions […]

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