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Re: Sniffing traffic of an enabled cisco router
From: Chris Serafin <chris () chrisserafin com>
Date: Sun, 14 May 2006 19:59:09 -0500

Here is a cool link sniffing for remote sniffing of Cisco routers.


     Remote Router Traffic Sniffing

   * Authors: redkommie && muts
   * Content: Sniffing Over GRE Tunnels.
   * Toolset: WHAX v.3.0 && Auditor Security Collection
   * Hardware: Cisco 2600 x 2
   * URL: http://new.remote-exploit.org/index.php/Router_sniff
   * Download : http://www.hackingdefined.com/movies/gre-sniff.zip
   * Format: AVI (Techsmith Codec)
   * File Size: 64.80 Megs

I have yet to get this to work.

cisco80211
Chris Serafin
IT Security / Cisco VoIP Engineer
chris () chrisserafin com




Hugo Vinicius Garcia Razera wrote:
Hello Gentleman's,

Doing a Pen test to a company i succeeded in enabling a cisco router
whit a very old ios, actually 11.2 to be more specific, well i have
readed some papers about redirecting the traffic of the router trough
a gre tunnel and sniffing it on a Linux box then send it back.

I actually succeeded in redirecting the traffic to my machine and
sniff it. The problem is that the traffic is not redirected back to
its destination.

I have tried to use the gre_relay plugging off ettercap whit no
success, I'm actually not so sure off how to use it.

is there any way to create like a policy routing on the Linux box, and
specify that any traffic coming from the interface tun0 to be send it
back from where it came.

I also have used the command
debug ip packets <acl number> dump

to see the traffic on the telnet terminal but the load is very heavy
and the router died

well can any one point me out in the direction to set up the Linux box
that is receiving the redirected traffic to send it back to the router
and get to its destination.

Thanks in advance,

Hugo Vinicius Garcia Razera
Security Consultant

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This List Sponsored by: Cenzic

Concerned about Web Application Security? Why not go with the #1 solution - Cenzic, the only one to win the Analyst's Choice Award from eWeek. As attacks through web applications continue to rise, you need to proactively protect your applications from hackers. Cenzic has the most comprehensive solutions to meet your application security penetration testing and vulnerability management needs. You have an option to go with a managed service (Cenzic ClickToSecure) or an enterprise software (Cenzic Hailstorm). Download FREE whitepaper on how a managed service can help you: http://www.cenzic.com/news_events/wpappsec.php And, now for a limited time we can do a FREE audit for you to confirm your results from other product. Contact us at request () cenzic com for details.
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