Snort mailing list archives
RE: Re: Snort Behind IPtables, contradicting evidence...
From: "Martijn Heemels" <martijn () yggdrasil yi org>
Date: Sat, 29 Sep 2001 02:09:52 +0200
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 That was an interesting thread... I think the FAQ should be updated with this, since this subject (that has come up again and again) is dealt with in only one sentence and the subject is apparently a little more complicated. Greets, Martijn - -- .: M. Heemels .:. webdesigner :. .: Eindhoven, NL, martijn () heemels com :. .: PGP of S/MIME encrypted e-mail preferred :.
Oinkers Bob and John, Thanks! That makes perfect sense and I should've known that! To sum up for the archives...When you have snort sitting behind iptables, snort sees every packet coming in (same as iptables). However, since iptables denies connections, before the 3 way handshake is complete, you won't probably see nearly as many alerts. The packets with the exploit data that snort is going to alert on come AFTER the connection is established (3-way handshake done). So with iptables denying connections, the data to trigger alerts doesn't show up at the box at all. Thanks again for your help! I can sleep better in my pen tonight.... Piglet James
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Current thread:
- Snort Behind IPtables, contradicting evidence... JSeddon (Sep 27)
- Re: Snort Behind IPtables, contradicting evidence... John Sage (Sep 27)
- <Possible follow-ups>
- Re: Snort Behind IPtables, contradicting evidence... Bob Hillegas (Sep 27)
- RE: Re: Snort Behind IPtables, contradicting evidence... John Berkers (Sep 27)
- Re: Re: Snort Behind IPtables, contradicting evidence... John Sage (Sep 27)
- Re: Re: Snort Behind IPtables, contradicting evidence... JSeddon (Sep 27)
- RE: Re: Snort Behind IPtables, contradicting evidence... Martijn Heemels (Sep 28)