Re: [squid-users] anonymous proxy

Dear Espoire,

You need 2 things:
1) a robust solution, i.e. a URL filter
2) an internet usage policy: the human resource department should
    communicate to staff to what extend they can use the internet
    access in the office for non-business activities.

There are various URL filters in the market:
a) Bluecoat (expensive / does not use Squid)
b) McAfee (expensive / does not use Squid)
c) many others
d) URLfilterDB (reasonable priced, uses Squid)

Note that I am biased because I represent URLfilterDB.

-Marcus

espoire20 wrote:
> Dear all
>
> please if you have a solution about the tools or somthing to add in the
> squiGuard can you help me after to stop ther anonymous proxy i company will
> creat a internet usage policy and communicate this clearly with all staff.
>
> but now i need solution please
>
> thank you
>
> Marcus Kool wrote:
>> There are over 75000 proxy sites and every day new ones appear.
>> There are numerous Yahoo groups, Google groups and mailing lists
>> who distribute new proxy sites every day.
>>
>> Sure, a network admin can make it a full daytime job to
>> run the race against the clock; block used proxy sites and block
>> tomorrow the proxy sites that his users used today, or...
>> evaluate several URL filters.
>>
>> -Marcus
>>
>>
>> espoire20 wrote:
>>> OK but what do you mean 2. A simple regex deny for proxy
>>> i have already blocked all outbound HTTP traffic in my routeur Cisco and
>>> i
>>> allowed just the proxy server and also i installed and configured the
>>> squiGaurd with Blacklist but they can use the anonymous proxy and go to
>>> see
>>> web site blocked
>>>
>>> for example for windows we can found bloking tools
>>> http://www.programmez.com/actualites.php?id_actu=2446 but me i need
>>> somthing
>>> in linux
>>>
>>> anonymous proxy like : www.Vtunnel.com , http://www.unblockya.com/
>>>
>>> I think in squid or linux we have blocking tools that we can use to block
>>> anonymous proxy
>>>
>>> many thanks
>>>
>>> Babu Chaliyath wrote:
>>>> On Tue, Nov 3, 2009 at 9:13 PM, espoire20 <zakariase2002_at_yahoo.fr>
>>>> wrote:
>>>>> Hi
>>>>>
>>>>> I have my Server proxy under Squid work very well but in the last time
>>>>> the
>>>>> users start to use anonymous proxy that allow users to connect to the
>>>>> Internet via an external site and bypass restrictions , so if you know
>>>>> some
>>>>> blocking tools under squid or linux to stop this big problem
>>>>>
>>>>> i will be thankfull if you can help me
>>>>>
>>>>> many thanks
>>>> 3 things might help you
>>>> 1. A good Accepted User Policy enforcement
>>>> 2. A simple regex deny for proxy and a block list
>>>> 3. Sarg/Calamaris report to find out suspicious sites
>>>>
>>>> Regards
>>>> Babs
>>>>
>>>>
>>
>
Received on Thu Nov 05 2009 - 14:30:00 MST