Re: Sniffing on a switch

On 10/27/05, Andy Meyers <andy.meyers@hushmail.com> wrote:
> Now i know people say you "cant" sniff on a switch and I know about ARP
> poisoning and MAC flooding. But there has to be another way. I have heard
> too many stories about "he sniffed my AIM conversation on a Cisco switch"
> (an example is in the most recent version of 2600). Does anyone know of any
> technique how to do this? Can you ARP poison a switch?

I've heard of the techniques used by DSNIFF, but have never tried it.

If you've got admin privs on a switch (either authorized or
unauthorized) you can span a port so that two get the same traffic.

ie: Make port 7/23 (your port) the same as port 7/9 (the port you want
to sniff).

Have done this to monitor systems before. Works like a charm!
--
Dave Bush <hockeystatman@gmail.com>

There are two seasons in my world - Hockey and Construction

------------------------------------------------------------------------------
Audit your website security with Acunetix Web Vulnerability Scanner: 

Hackers are concentrating their efforts on attacking applications on your 
website. Up to 75% of cyber attacks are launched on shopping carts, forms, 
login pages, dynamic content etc. Firewalls, SSL and locked-down servers are 
futile against web application hacking. Check your website for vulnerabilities 
to SQL injection, Cross site scripting and other web attacks before hackers do! 
Download Trial at:

http://www.securityfocus.com/sponsor/pen-test_050831
-------------------------------------------------------------------------------