Home page logo

pen-test logo Penetration Testing mailing list archives

Re: Tool to find hidden web proxy server
From: Miles Stevenson <miles () mstevenson org>
Date: Wed, 1 Sep 2004 18:01:29 -0400

Hello Vinay,

 I take this to mean that you believe you have an unauthorized webproxy on 
your network that is not running on port 80 and you are trying to hunt it 
down? Do you not have egress firewall filtering to block unauthorized ports 
going outbound? 

In any case, here is something you can do to find HTTP traffic on your network 
that is not running on port 80:

1) Set up an IDS sensor that can see all the traffic on your network. 
Prefferably a Unix/Linux box.

2) Download and install ngrep at http://ngrep.sourceforge.net

3) Use the following ngrep command to search for HTTP traffic that is not 
running over port 80:

ngrep 'HTTP\/1\.1' tcp port not 80 

Please note that depending on the amount of traffic on your network and the 
speed of your IDS machine, this could be too much data for ngrep to sift 
through in real time. As an alternative, you can capture a binary tcpdump and 
have ngrep process this at a later time.

Good luck.

On Wednesday 01 September 2004 07:26 am, vinay mangal wrote:
Dear all,

I am looking for a tool to find the hidden web proxy server in my local

Any hint will be useful.

with regards

--- Ethical Hacking at the InfoSec Institute. All of our class sizes are
guaranteed to be 12 students or less to facilitate one-on-one interaction
with one of our expert instructors. Check out our Advanced Hacking course,
learn to write exploits and attack security infrastructure. 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.


Miles Stevenson
miles () mstevenson org
PGP FP: 035F 7D40 44A9 28FA 7453 BDF4 329F 889D 767D 2F63

Attachment: _bin

  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]