Snort mailing list archives
SNORT sensor on FreeBSD Bridged IPFW Firewall!
From: "Athena" <mailinglists () presstekeurope com>
Date: Tue, 16 Jan 2007 11:08:08 -0000
Hi Group I have just finished setting up snort console box with two snort sensors running on FreeBSD and all seems to be working perfectly! However I would be grateful if somebody would be able to help me with one question: Firstly here is a quick rundown of my LAN. I have a FreeBSD-6.0 bridged firewall with three interfaces. The first two are configured in a bridge (passed through IPFW) with no IP addresses and the third is a management interface with one public IP Assigned. One side of the bridge connects into a DSL router and the other side & management interface connect into a HUB (Not Switch) where various other FreeBSD systems with public IPs sit: 1] POSTFIX SMTP 2] PRIMARY DNS 3] SNORT CONSOLE 4] NATD SERVER I currently have a two sensors running on both sides of the NATD Server which logs traffic both on my private LAN and firewalled public side; this works perfectly, however its only providing me information on my trusted network and I still have no idea what's happening on the untrusted side. So this leads me onto my question: Is it possible to install a SNORT sensor on the internet facing interface of my FreeBSD Bridge and if I did would it capture packets before they are passed through IPFW? Or, as I suspect would it be better if I install a TAP between my router and the internet facing interface? Hope somebody can help & many thanks in advance. Regards Athena
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- SNORT sensor on FreeBSD Bridged IPFW Firewall! Athena (Jan 16)