Snort mailing list archives

Re: Maximum length for Content String


From: Venkataramesh Bontupalli <bontupalliv1 () udayton edu>
Date: Fri, 16 May 2014 23:11:31 -0400

Yes, the maximum length of the regex that could be possible for detection..

For example:
alert tcp any any --> any any(msg: 'attempted anonymous FTP access';
content:'anonymous'; sid: 100001;)

In this example the length of content string is 9(anonymous)

So i would to know what could be the maximum length of content string
possible..
On May 16, 2014 9:02 PM, "waldo kitty" <wkitty42 () windstream net> wrote:

On 5/16/2014 3:29 PM, Venkataramesh Bontupalli wrote:
Dear Snort Experts,

Could you please tell me know the maximum allowable content string
length and
also pcre string length in a typical snort rule for matching the
malicious content.

content string length? as in what? fast_pattern??

i don't understand your question about pcre string length... are you
talking
about the length of the regex used in the detections or the length of
strings
that may match the regex??

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