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Re: Proxy Port detection
From: "Ivan Coric" <ivan.coric () workcoverqld com au>
Date: Thu, 23 Dec 2004 10:39:04 +1000

Hi John,

you need to get a proxy into there, asap.

check squid, great app and open source
http://www.squid-cache.org/

cheers
Ivan


Ivan Coric, CISSP, RHCE
Senior IT Security Specialist
Information Technology
WorkCover Queensland
Ph: (07) 30066414 Fax: (07) 30066424
Email: ivan.coric () workcoverqld com au

John Madden <chiwawa999 () yahoo com> 23/12/2004 1:45:07 am >>>
Hi,

In our enterprise we have URL filtering capabilities
and we restrict the usual sites (Porn, Sports,
Gambling etc..)

We do not use a proxy, so everyone goes directly to
the internet. 

I believe that some users put in their proxy settings
an anonymous proxy using port 80 (which is obviously
allowed) and in that manner avoid the restriction of
the URL filtering.

First thoughts:

- Blocking all the anonymous proxy is imposible and  
would be a full time job
- The use of a proxy is not an option right now

Is there any way to detect this type of traffic
(HTTP-Proxy) ?

I'm sure someone had this problem before...

Any help would be appreciated.

Thanks


                
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