Nick Kew wrote:

On 29 May 2007, at 22:31, Marc Perkel wrote:

I'm running FC6 and added mod_security using the default rule set and the load level on the system is about 5 times higher than without it. I'm wondering what rule sets I might disable that would give me some security without slowing the server down to a crawl. Could use some practical advice.

What are you protecting? A jump that big suggests the possibility that your contents may be predominantly static. In which case, turn mod_security off!

The really big performance hit with mod_security is if you scan request
and/or response bodies with it. And I can't see how you could usefully apply
any default ruleset to that.


Probably people with older versions of php/mysql apps like phpbb that are exploitable. Mostly protecting against request/post expliots rather than filtering outgoing content.

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