Snort mailing list archives
Re: Understanding IDS & TAPS
From: twig les <twigles () yahoo com>
Date: Wed, 18 Dec 2002 09:54:11 -0800 (PST)
Your questions span (pun!) more than the IDS field. Pick up a good book on switches or at least something that explains the OSI model. As loath as I am to recommend reading theory, it really applies. A short answer is that switches forward packets out of specific ports based on a table they keep. The table correlates MAC address<->port relationships. To sniff on a switch you need one of two things: a port that the switch sends ALL traffic to, regardless of the destination MAC, or a piece of software like Ettercap that does massive ARP poisoning. For multiple obvious reasons you prolly want to stick to the former. --- "Carleton, Sam (SCI TW)" <Sam_Carleton_TW () stercomm com> wrote:
Folks, I understand the IDS and TAPS, but not completely. The main thing is the physical hookup of the TAP to the IDS. I don't understand the "100Mb IDS Tapping Diagram (with only 100bt span port)" diagram. The switch being used, can it be any old switch or does it have to be something that is programmable? What I don't understand is how the traffic gets through the switch. How does the switch know where to send the packets which are coming in from the Port A and Port B? Sam
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Current thread:
- Understanding IDS & TAPS Carleton, Sam (SCI TW) (Dec 18)
- Re: Understanding IDS & TAPS twig les (Dec 18)
- <Possible follow-ups>
- RE: Understanding IDS & TAPS Carleton, Sam (SCI TW) (Dec 18)
- RE: Understanding IDS & TAPS Nigel Clarke (Dec 19)
- RE: Understanding IDS & TAPS Carleton, Sam (SCI TW) (Dec 18)
- Re: Understanding IDS & TAPS Matt Kettler (Dec 18)