Snort mailing list archives
RE: Snort and Firewall on the same box
From: "Hawrylkiw, Dan G" <dan.g.hawrylkiw () intel com>
Date: Mon, 14 May 2001 10:28:49 -0700
Paul, I'm assuming that you're using Linux/IPchains given the ethX designations. Snort sees everything before IPchains, so you won't need eth0 listening to have snort monitor all traffic inbound on eth1. Just set up snort to listen on eth1. If you are using another product such as Firewall-1, you might need to test it to be sure. This is because IPchains runs in the kernel space, while many 3rd party firewall applications run in higher layers.. I have been testing snort on a 3 interface ipchains firewall with a second snort box (same rules) also listening on the same outside hub. After ~3 weeks, both boxes have alerted on the same traffic whether the firewall blocks it or not. This includes light security scanning on my part to supplement the usual script kiddie noise.... /Dan Hawrylkiw RHCE Server Specialist Intel Corp. / Home Products Group -----Original Message----- From: Paul D. Shaffer [mailto:paulshaf () earthlink net] Sent: Friday, May 11, 2001 7:37 PM To: snort-users () lists sourceforge net Subject: [Snort-users] Snort and Firewall on the same box Sorry to dig up an old thread which I don't recall ever being satisfactorily resolved, but I've been pondering a good way to run snort and an FW on the same box and came up with this angle: Your box has three NICs: eth0, 1, and 2. Snort listens on eth0. Eth1 and 2 form a stealthed, bridged firewall with say, eth1 on the outside. Eth0 and eth1 are jacked into the same hub right behind the external router, ISP, whatever. Does that not pretty much eliminate any doubt about what snort is seeing, regardless what the firewall is doing? I might give this a try unless someone can point out something wrong with the idea... Cheers, Paul Longtime lurker _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: http://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: http://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users
Current thread:
- Snort and Firewall on the same box Paul D. Shaffer (May 11)
- RE: Snort and Firewall on the same box Steve Shockley (May 11)
- <Possible follow-ups>
- RE: Snort and Firewall on the same box Hawrylkiw, Dan G (May 14)