[Snort-users] Flags rule option

Martin Roesch roesch at ...1935...
Thu Sep 26 18:36:07 EDT 2002


What version of Snort are you using?  Can you look at the BUGS file and give
us a formatted report?

     -Marty


On 9/26/02 8:21 PM, "Bill McCarty" <bmccarty at ...5196...> wrote:

> Hi all,
> 
> I have the following Snort rule:
> 
> alert tcp any any -> XXX.XXX.XXX.XXX 1024:65535 (flags:S+; flags:A!;
> msg:"Local suspicious inbound"; )
> 
> This rule matches the following datagram:
> 
> 09/26/02-15:49:14.256645 YYY.YYY.YYY.YYY:80 -> XXX.XXX.XXX.XXX:24247
> TCP TTL:237 TOS:0x0 ID:0 IpLen:20 DgmLen:40 DF
> *****R** Seq: 0x2ED4C858 Ack: 0x0 Win: 0x0 TcpLen: 20
> 
> I think that both flags options must be matched in order for the rule as a
> whole to match. Yet, the matching datagram does not have the S flag set.
> What am I missing?
> 
> Thanks!
> 
> ---------------------------------------------------
> Bill McCarty
> 
> 
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-- 
Martin Roesch - Founder/CTO Sourcefire Inc. - (410) 290-1616
Sourcefire: Professional Snort Sensor and Management Console appliances
roesch at ...1935... - http://www.sourcefire.com
Snort: Open Source Network IDS - http://www.snort.org





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