Security Basics mailing list archives
RE: Caching a sniffer
From: "David Gillett" <gillettdavid () fhda edu>
Date: Thu, 25 Mar 2004 08:06:09 -0800
-----Original Message----- From: Fernando Gont [mailto:fernando () gont com ar] Sent: Wednesday, March 24, 2004 2:27 PM To: gillettdavid () fhda edu; security-basics () securityfocus com Subject: RE: Caching a sniffer At 08:58 24/03/2004 -0800, David Gillett wrote:I presume that some switches, faced with something likemacoff, willoverflow the table such that legitimate addresses thatshould have beenlearned start flooding to all ports as well. But this is not the only possible reaction of a switchednetwork tomacoff! If Cisco's port security is enabled, the switch mayjust shutdown the port running macoff.How does it detect this? By realizing that frames from a given port come from several different MAC source addresses?
Exactly. The configurable parameters for port security are: 1. Maximum number of different source MAC addresses to be seen from this port. 2. Action to be taken (alert, or shutdown port) when this limit is exceeded. David Gillett --------------------------------------------------------------------------- Ethical Hacking at the InfoSec Institute. Mention this ad and get $545 off any course! All of our class sizes are guaranteed to be 10 students or less to facilitate one-on-one interaction with one of our expert instructors. Attend a course taught by an expert instructor with years of in-the-field pen testing experience in our state of the art hacking lab. Master the skills of an Ethical Hacker to better assess the security of your organization. Visit us at: http://www.infosecinstitute.com/courses/ethical_hacking_training.html ----------------------------------------------------------------------------
Current thread:
- RE: Caching a sniffer, (continued)
- RE: Caching a sniffer Chris Merkel (Mar 11)
- RE: Caching a sniffer Shawn Jackson (Mar 23)
- RE: Caching a sniffer David Gillett (Mar 24)
- Re: Caching a sniffer Patrick Toomey (Mar 24)
- RE: Caching a sniffer Shawn Jackson (Mar 24)
- RE: Caching a sniffer Burton M. Strauss III (Mar 25)
- RE: Caching a sniffer Fernando Gont (Mar 25)
- RE: Caching a sniffer Shawn Jackson (Mar 24)
- RE: Caching a sniffer David Gillett (Mar 24)
- RE: Caching a sniffer Fernando Gont (Mar 25)
- RE: Caching a sniffer David Gillett (Mar 25)
- RE: Caching a sniffer David Gillett (Mar 24)
- 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)