Re: Sniffing traffic of an enabled cisco router

From: Chris Serafin (chris@chrisserafin.com)
Date: Sun May 14 2006 - 20:59:09 EDT


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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