Security Basics mailing list archives
RE: Caching a sniffer
From: "David Gillett" <gillettdavid () fhda edu>
Date: Thu, 25 Mar 2004 08:21:21 -0800
A switch is not a hub/router. In fact it is a micro segmented bridge. A switch operates at layer 2 of the OSI model ie MAC address layer.
Amen, brother.
Therefore if someone has plugged a scanner into a network point they will not be able to sniff any useful information from the network unless that person has admin access to the switch. You can check this by ensuring that none of the ports on the switches are in span mode
While you need admin access to set up a span port, Shawn and I have alluded to two different techniques which can allow non-admin users to sniff traffic on a switched network. It's true that neither of these is quite "normal behaviour" -- they involve using special tools to modify the behaviour of hosts or switches. But the tools exist and are readily available, and so the issue that confronts admins is how to detect and/or frustrate their use. David Gillett
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Current thread:
- RE: Caching a sniffer, (continued)
- RE: Caching a sniffer Fernando Gont (Mar 25)
- RE: Caching a sniffer Shawn Jackson (Mar 25)
- RE: Caching a sniffer David Gillett (Mar 25)
- RE: Caching a sniffer Shawn Jackson (Mar 25)
- RE: Caching a sniffer David Gillett (Mar 25)
- RE: Caching a sniffer Shawn Jackson (Mar 25)
- RE: Caching a sniffer Andrew Shore (Mar 25)
- RE: Caching a sniffer Paul Blackstone (Mar 25)
- RE: Caching a sniffer Byron Copeland (Mar 26)
- Re: Caching a sniffer Aaron (Mar 29)
- RE: Caching a sniffer Paul Blackstone (Mar 25)
- RE: Caching a sniffer David Gillett (Mar 25)
- RE: Caching a sniffer Andrew Shore (Mar 25)
- RE: Caching a sniffer Shawn Jackson (Mar 25)
- RE: Caching a sniffer Shawn Jackson (Mar 25)
- RE: Caching a sniffer David Gillett (Mar 26)
- RE: Caching a sniffer Shawn Jackson (Mar 25)
- RE: Caching a sniffer David Gillett (Mar 25)
- RE: Caching a sniffer Shawn Jackson (Mar 25)
- RE: Caching a sniffer Andrew Shore (Mar 25)
- RE: Caching a sniffer Shawn Jackson (Mar 25)
- RE: Caching a sniffer David Gillett (Mar 26)