Re: Tool to find hidden web proxy server

[Marc <reply.to.newsgroup () mozilla org>]

I would try the following, in order:

1. Have a look at who has Internet access and in that list, isolate the 
people who could have the skills to install a proxy. While not a very 
hard operation, not every employee can install such a thing.

2. Enable "detailed" logging of your firewall rule that controls 
Internet access and check your logs for corresponding machines. You 
could eventually scan only those machines to find the ones you're 
looking for.

3. Depending on the size of your network, you could perform a full port 
scan and/or sniff traffic. By sniffing, you could "easily" find the 
proxies since they would likely be the machines with the most 
connections and/or traffic. I've done something similar by using Cain 
(for ARP spoofing) in parallel with Sniphere 2.0 (a small and free 
sniffer). Sniphere gives you each port and IP address a machine is 
connected to when you use its "session" option (can't recall the exact 
name).

Good luck,


--
Marc


vinay mangal wrote:
> Dear all,
>
> Thanks for your suggestions. May be I am not able to define my question
> properly.
>
> This problem is strictly with in company internet access firewall and in the
> LAN only. In a company, policy for Internet access says it is through IP
> only. The others can not browse the internet. This policy is implemented on
> firewall. Few smart guys have installed free proxy server running on non
> default ports and distributed the internet access to their friends. The
> firewall sees the traffic coming from the authorized IP and does not stop
> them. We want to know who has installed proxy on there machine.
>
> I hope, I am able to clearly define my question. Thanks
>
>
> vinay
>
>
> ----- Original Message -----
> From: "wnorth" <wnorth () verizon net>
> To: "'vinay mangal'" <vinay.mangal () eil co in>; "'Pen'"
> <pen-test () securityfocus com>
> Sent: Wednesday, September 01, 2004 11:41 PM
> Subject: RE: Tool to find hidden web proxy server
>
>
>
> > I'm not sure of a tool, but simply scanning your network for TCP/8080 or
> > TCP/80 or TCP/8000 may give you the results you are looking for. Simple
>
> NMAP
>
> > would work.
> >
> > -Wes
> >
> > -----Original Message-----
> > From: vinay mangal [mailto:vinay.mangal () eil co in]
> > Sent: Wednesday, September 01, 2004 4:27 AM
> > To: Pen
> > Subject: Tool to find hidden web proxy server
> >
> > Dear all,
> >
> > I am looking for a tool to find the hidden web proxy server in my local
> > network.
> >
> > Any hint will be useful.
> >
> > with regards
> > Vinay
>
>
>
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with one of our expert instructors. Check out our Advanced Hacking course,
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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
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