Snort mailing list archives

Re: [Emerging-Sigs] what s the real difference here?


From: Joel Esler <jesler () sourcefire com>
Date: Tue, 13 Jul 2010 20:20:12 -0400

On Jul 13, 2010, at 8:16 PM, evilghost () packetmail net wrote:

Yes, I do understand.  Like I said, I'd like a Snort team comment on this one, just so we can be clear.  Are you 
saying that we should make it clear in the manual?


I'd absolutely love to see a "Caveats" section, even if it were nothing more than an ordered list.  I think it would 
be invaluable.  A singular line item that says
'uricontent:"souls"' and 'content:"souls"; http_uri;' are the same." and "Content modifiers like distance, within, 
isdataat, and others are not applicable to a content match
constrained to a specific buffer such as http_uri, http_cookie, or http_header.  The reason for this is due to the 
pointer set in the content engine/match compared with the pointer
set in the separate constrained buffer."  That's worth gold since it's idiosyncratic with Snort and rule syntax; not 
something gleaned from the manual or strict adherence to the
manual.

Write "Caveats" from the aspect of someone who just picked up the Snort manual and can RTFM but writes rules with 
strict adherence to the manual itself and doesn't have the benefit
of years of experience with 'rulecraft'.

Okay, I'll take that in and see what I can do.
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