Snort mailing list archives
RE: flexresp2 is back and needs testing
From: "pfeito" <pfeito () netcabo pt>
Date: Mon, 30 Aug 2004 16:36:15 +0100
Here it goes Jeff, I made a new pcap, this time with a "reset_dest" rule. It didnt work also. Cant think of anything that could be wrong :\ The pcap was captured on the FTP (212.22.xx.xx). The remote client is the 193.xx.xx.xx. Thanks again! -pfeito -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Pfeito, I'd like for you to try two things. First, try using only reset_dest in your rule. Second, can you send me the pcap dump so I can take a look at it? The pcap dump I'm interested in will come from the FTP server. I want to see all the packets from connection establishment to sp_respond2 firing the response packets. - -Jeff On Aug 30, 2004, at 7:05 AM, pfeito wrote:
Hi, I'm currently testing flexresp2. For now I'm just using a simple rule that terminates a FTP connection if someone tries to login with user "root". alert tcp $EXTERNAL_NET any -> $HOME_NET 21 (msg:"FTP root login attempt!"; flow:to_server,established; content:"USER"; nocase; content:"root"; distance:1; nocase; pcre:"/^USER\sroot/smi"; classtype:suspicious-login; sid:1000002; rev:2; resp: reset_both;) I try to login remotely with user root, but the connection does not terminate. I sniffed with tcpdump and I know that it the TCP RST packets are being sent, but the connection stays up. Then I tried the same but with both peers on the same LAN, but with the same results. The TCP RST packets are being sent also. I've tcpdump logs if someone is interested in looking into them. My snort.conf-flexresp2 config config flexresp2_interface: eth2 config flexresp2_attempts: 10 What could be going wrong? Thanks in advance, -pfeito-----Original Message----- From: snort-users-admin () lists sourceforge net [mailto:snort-users- admin () lists sourceforge net] On Behalf Of Jeff Nathan Sent: segunda-feira, 26 de Julho de 2004 1:33 To: snort-users () lists sourceforge net Subject: [Snort-users] flexresp2 is back and needs testing Hi Snortees, I've got a new version of the flexible response code, sp_respond2, ready for testing. This new version uses libdnet (http://libdnet.sourceforge.net) and is significantly faster than all previous versions. During testing I was able to reset TCP connections where both the client and server were on the same LAN. The patch is attached to this message but if you'd like to download it, it's also available from http://cerberus.sourcefire.com/~jeff/archives/snort/sp_respond2/ If you encounter any problems with the attached patch, refer to the website for an update before sending email. It's most helpful if you're somewhat experienced with Snort. For the time being I'd like to avoid tutoring users during testing.
- -- http://cerberus.sourcefire.com/~jeff (gpg/pgp key id 6923D3FD) "Great spirits have always encountered violent opposition from mediocre minds." - Albert Einstein -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (Darwin) iD8DBQFBMz1YEqr8+Gkj0/0RAqcCAKCqt6bNBfOHlqOYZIo6TXs0L0qt1gCbBJio W7X45fODL7UYAHi+PBsCd+k= =V4id -----END PGP SIGNATURE-----
Attachment:
reset_dest.pcap
Description: reset_dest.pcap
Current thread:
- flexresp2 is back and needs testing Jeff Nathan (Jul 25)
- RE: flexresp2 is back and needs testing pfeito (Aug 30)
- Re: flexresp2 is back and needs testing Jeff Nathan (Aug 30)
- <Possible follow-ups>
- RE: flexresp2 is back and needs testing pfeito (Aug 30)
- Re: flexresp2 is back and needs testing Jeff Nathan (Aug 31)
- Re: flexresp2 is back and needs testing Pedro Fortuna (Aug 31)
- Re: flexresp2 is back and needs testing Pedro Fortuna (Sep 05)
- Re: flexresp2 is back and needs testing Jeff Nathan (Sep 08)
- Re: flexresp2 is back and needs testing James Riden (Sep 08)
- Re: flexresp2 is back and needs testing Jeff Nathan (Sep 08)
- Re: flexresp2 is back and needs testing Pedro Fortuna (Sep 08)
- Re: flexresp2 is back and needs testing Jeff Nathan (Sep 08)
- Re: flexresp2 is back and needs testing Pedro Fortuna (Sep 08)
- Re: flexresp2 is back and needs testing Jeff Nathan (Sep 08)
- Re: flexresp2 is back and needs testing Jeff Nathan (Aug 31)
- RE: flexresp2 is back and needs testing pfeito (Aug 30)