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| Subject: | Re: [Snort-sigs] Strange PCRE usage in standard snort rules |
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| Date: | Sun, 08 May 2005 21:18:18 -0500 |
On Mon, 2005-05-09 at 11:59 +1000, Erik de Castro Lopo wrote:
I've noticed some strange usage of PCRE in the netbios.rules. For
instance, rule 2937 has the following construct:
pcre:"/^.{27}/R";
content:"&|00|"; distance:29; within:2;
Err.... I was under the impression that distance and within only work on a previous "content" match, and not "pcre" matches. Are you saying distance can be used to offset from previous "pcre" matches? Can /R in pcre then also be used to offset from previous "content" matches? Curious, Frank
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