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convair
14-02-2010, 09:44 PM
Is there a list of all the proxy servers anywhere?

I want to block the proxy's for Firefox

Speedy Gonzales
14-02-2010, 09:46 PM
? And whats this going to achieve?

convair
14-02-2010, 09:49 PM
Stop people getting past the filter.

trinsic
14-02-2010, 09:54 PM
Proxies come and go on a daily basis so its impossible to do this.

inphinity
15-02-2010, 07:41 AM
What exactly is the result you're after? If we can clarify this, we may have some better suggestions how to help ;)

Chilling_Silence
15-02-2010, 08:13 AM
I'm with inphinity, I'd try explaining what you're hoping to achieve overall, add just a little bit of extra information. There's a good chance people might be able to offer an alternative, or a better way to achieve your final goal, rather than just solve your immediate roadblock.

robsonde
15-02-2010, 11:28 AM
Stop people getting past the filter.

this is an ongoing problem for my network admins.
I have been in such a role for about 10 years, so my advise is from experience.

you can find such a list but it will be incomplete.
proxy servers come and go every day.
the users only have to find one that you missed and you fail.

depending on the environment, you should have policy about what people can and cant do on the internet.
part of that policy should be "users on the network are not to bypass any security, this includes turning off anti-virus program or bypassing the proxy rules"

once you have policy then monitor the logs, when you fine someone using a proxy you have take action.

a public hanging is good to keeping people in line :-)

Speedy Gonzales
15-02-2010, 11:32 AM
If you want to block sites, if the router (If you have 1), supports blocking urls / domains add them to that, then noone will get to the site. Including you

fred_fish
15-02-2010, 01:03 PM
a public hanging is good to keeping people in line :-)

+1

A social solution is much more effective than the technological one.

Chilling_Silence
15-02-2010, 01:27 PM
A semi-decent solution is to force users through your own proxy to get out to the internet, it's not as easy to cascade proxy servers ;)

robsonde
15-02-2010, 01:58 PM
A semi-decent solution is to force users through your own proxy to get out to the internet, it's not as easy to cascade proxy servers ;)

most networks use a http proxy.

most users by-pass this by using a web proxy (google php-proxy)

one more common example of this is www.hidemyass.com

robsonde
15-02-2010, 02:00 PM
+1

A social solution is much more effective than the technological one.

even in a large workplace, if staff hear that bob was given a written warning for breach of internet policy then they all just snap in to line.