Re: Check for NO TCP Flags set?

[Matt Kettler <mkettler () evi-inc com>]

At 02:39 PM 5/9/2003 -0400, Sheahan, Paul wrote:
> I know I can check for flags set using Flags:S for example. Though I was
> curious if there is a way to check for NO flags being set?. I read that this
> may be seen in illicit servers.

Actually, flags:S checks for Syn bit set and all the other bits cleared. 
Flags: S+ is just a single bit check..

If you RTFM:
http://www.snort.org/docs/writing_rules/chap2.html#tth_sEc2.3.13

Flags:0 specifies no bits set.



-------------------------------------------------------
Enterprise Linux Forum Conference & Expo, June 4-6, 2003, Santa Clara
The only event dedicated to issues related to Linux enterprise solutions
www.enterpriselinuxforum.com

_______________________________________________
Snort-users mailing list
Snort-users () lists sourceforge net
Go to this URL to change user options or unsubscribe:
https://lists.sourceforge.net/lists/listinfo/snort-users
Snort-users list archive:
http://www.geocrawler.com/redir-sf.php3?list=snort-users