Snort mailing list archives
RE: Error on new Rule
From: "Joshua Berry" <jberry () PENSON COM>
Date: Wed, 16 Mar 2005 09:33:16 -0600
You are running flexresp so are probably not inline, this would be the online section to read: http://www.snort.org/docs/snort_htmanuals/htmanual_232/node23.html#SECTI ON00473000000000000000 This will show you how to use the resp keyword in snort rules. The only thing you will be able to do is send ICMP Net/Host/or Port unreachables. This might appear to the attacker as though the actual attack failed, however I don't believe it will be successful in protecting from the actual payload of the packet sent. ICMP Port unreachable might be the best option in this case. TCP resets aren't available for UDP connections because they are two different protocols. ICMP Unreachables are available because they are what is sent if the Net/Host/Port is not up, UDP relies upon this to have some sort of notification system if the connection failed. -----Original Message----- From: snort-users-admin () lists sourceforge net [mailto:snort-users-admin () lists sourceforge net] On Behalf Of Snort Sent: Wednesday, March 16, 2005 9:14 AM To: Snort-users () lists sourceforge net Subject: RE: [Snort-users] Error on new Rule For UDP you use ICMP and TCP uses resets The readme.flexresp and readme.inline might help clear a few things up, along with the online manual http://www.snort.org/docs/snort_htmanuals/htmanual_232/node7.html Michael Brown _____ From: snort-users-admin () lists sourceforge net [mailto:snort-users-admin () lists sourceforge net] On Behalf Of Ron Jenkins Posted At: Wednesday, March 16, 2005 9:12 AM Posted To: Snort Conversation: Error on new Rule Subject: [Snort-users] Error on new Rule On the below new rule, I added the react:block for the FlexResp feature of snort. alert udp $HOME_NET any -> $EXTERNAL_NET 41170 (msg:"P2P Manolito Search Query"; content:"|01 02 00 14|"; offset:16; depth:4; reference:url,www.blubster.com; reference:url,openlito.sourceforge.net; react:block; classtype:policy-violation; sid:3459; rev:2;) I get the below error: ERROR: Line /etc/snort/local.rules(28): TCP Options on non-TCP rule Fatal Error, Quitting.. Does FlexResp only work on TCP rules and not UDP? Thanks... Ron Jenkins (MCNE, CNE6, MCP, CCNA, CCEA) Senior Architect Data Integrity, LLC "We Integrate People with Solutions" 1724 Dallas Drive Suite 11 Baton Rouge, La 70806 Office. 225.927.8030 Fax. 225.927.8033 Cell225.931.1632 Email. rjenkins () dibr net Web. www.dibr.net
Current thread:
- Error on new Rule Ron Jenkins (Mar 16)
- <Possible follow-ups>
- RE: Error on new Rule Ron Jenkins (Mar 16)
- RE: Error on new Rule Kendall Risselada (Mar 16)
- Re: Error on new Rule James Riden (Mar 16)
- RE: Error on new Rule Kendall Risselada (Mar 16)
- RE: Error on new Rule Snort (Mar 16)
- RE: Error on new Rule Joshua Berry (Mar 16)