Perform action based on load avg

Posted by sfx on Server Fault See other posts from Server Fault or by sfx
Published on 2012-08-30T14:50:53Z Indexed on 2012/08/30 15:39 UTC
Read the original article Hit count: 287

Filed under:

linux

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ddos

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high-load

I'm running some web applications on an debian server and have to struggle with ddos attacks sometimes. It's eating up all my resources and I can't ssh anymore into the server. An idea was to drop all connections if the load avg is too high, so there are still resources for me and accept new connections if the load avg is low enough. Since this has to work under heavy load I'm afraid a cronjob wouldn't be fast enough or take too much resources.

tl;dr: Is there a way to configure the behavior if the load avg is above a specific threshold?

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