Snort mailing list archives

Re: Fast Pattern Matcher not using http_raw_* content strings?


From: Mike Cox <mike.cox52 () gmail com>
Date: Wed, 1 Oct 2014 16:36:03 -0400

Nevermind.  I found a newer Snort manual as well as this helpful error
message:

Cannot use the fast_pattern content modifier for a lone http
cookie/http raw uri /http raw header /http raw cookie /status code /
status msg /http method buffer content.


Good to know, thanks!

-Mike Cox

On Tue, Sep 30, 2014 at 1:59 PM, Mike Cox <mike.cox52 () gmail com> wrote:

I apologize if this is an elementary question but the Snort manual wasn't
*entirely* clear on this.  From what I can tell, the Fast Pattern Matcher
isn't using content matches if they have a 'http_raw_*' keyword, even if
they are the longest content match.  However, non-'raw' HTTP Inspect
keywords (e.g. "http_uri", "http_header", etc.) are used by the Fast
Pattern Matcher and it searches the normalized buffer.  Is this correct?
Is this the case for all Snort versions that use the HTTP Inspect
preprocessor and the Fast Pattern Matcher?

Thanks!

-Mike Cox

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