Snort mailing list archives
Re: Rule for initial TCP SYN packet
From: Markus Lude <markus.lude () gmx de>
Date: Thu, 9 Jan 2014 19:56:11 +0100
On Thu, Jan 09, 2014 at 10:51:15AM -0500, Thomas Hyslip wrote:
Hi,
Hi,
I'm trying to write a rule to catch the first TCP packet for new sessions that have the SYN flag set. But, I'm not seeing anything. If I remove the flag:S option i see everything, any suggestions? here is the rule I have set now. If I craft a packet with hping3, Snort alerts, but I thought this would catch all new TCP connections to webpages. alert tcp $HOME_NET any -> any 80 (msg:"egress filter tcp traffic to port 80 with syn flag set"; flow: stateless; flags:S; classtype:test; sid:1000001; rev:1;)
does it work with flags:S,12; ? Regards, Markus ------------------------------------------------------------------------------ CenturyLink Cloud: The Leader in Enterprise Cloud Services. Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical Workloads, Development Environments & Everything In Between. Get a Quote or Start a Free Trial Today. http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk _______________________________________________ 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://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news!
Current thread:
- Rule for initial TCP SYN packet Thomas Hyslip (Jan 09)
- Re: Rule for initial TCP SYN packet Markus Lude (Jan 09)
- Re: Rule for initial TCP SYN packet Thomas Hyslip (Jan 09)
- Re: Rule for initial TCP SYN packet Markus Lude (Jan 09)