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Re: [Snort-users] http inspect editing

from [Matt Kettler] Network Security [Permanent Link]
Subject: Re: [Snort-users] http inspect editing
Date: Thu, 24 Feb 2005 16:46:38 -0500
At 03:51 PM 2/24/2005, David Naylor wrote:
Does anyone know how to edit unclassified rules? For example, I would like to edit or delete the rule for "double decoding attack" - http_inspect 

That's not a rule at all, it's an alert generated by a preprocessor.

Since it's not a rule, you'd need to modify the source code for http_inspect and recompile snort to do any kind of edit.

However, you can change the parameters you pass to http_inspect in your snort.conf to disable this detection. Just add "double_decode no" to your profile in snort.conf.

My personaly approach is to not have any "default" http_inspect. I only run http_inspect against my specific webservers.
i.e:

preprocessor http_inspect_server: server 208.39.141.94 \
    profile all ports <censored rest of config>


See the README.http_inspect that comes with the snort tarball for a bit more detail on what kinds of things you can tell http_inspect to do or not do.






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