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Mitigating Slow HTTP DoS Attacks with ModSecurity

 
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Steffen
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Joined: 15 Oct 2005
Posts: 2574
Location: Hilversum, NL, EU

PostPosted: Thu 14 Jul '11 12:19    Post subject: Mitigating Slow HTTP DoS Attacks with ModSecurity Reply with quote

The latest version of the ModSecurity 2.6 has new directives called the SecReadStateLimit and SecWriteStateLimit.

The attack scenario raised by slow HTTP POST attack is related to web server software (Apache, IIS, SunONE, etc...) and can not be directly mitigated by the application code. In the blog post, we will highlight the two main varieties of slow HTTP attacks - slow request headers and slow request bodies. We will then provide some new mitigation options for the Apache web server platform with ModSecurity.

Readmor at the blog: Mitigating Slow HTTP DoS Attacks

Steffen
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