Snort mailing list archives

http_decode vs. alerts


From: "Williams Jon" <WilliamsJon () JohnDeere com>
Date: Mon, 1 Oct 2001 13:57:21 -0500

Now that things have started to quiet down a bit, I'm going through my logs
looking for why I wasn't seeing the kinds of alerts from Nimda that people
were reporting on the list.  What I found was that I'd set up custom actions
to handle all of my signatures, but most of the Nimda traffic was being
caught by the http_decode preprocessor and being recorded to a separate file
rather than following my custom actions.

I don't really care how I get there, but I'd like to get to the point where
all my alerts go to the same place.  Can I apply my custom actions to the
preprocessor?  Should I just remove the http_decode lines and just accept
the fact that I'll miss Unicode-obfuscated attacks?  Is there another option
that I've missed?

Thanks.

Jon


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