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How to block ultrasurf?

JohnGerhardt
JohnGerhardt asked
on
20,909 Views
Last Modified: 2014-09-21
Hi experts,

Anybody out there know how to solidly block the software ultrasurf.
I am the administrator for my coporate firewall and we also have in place a bluecoat filtering system. Both are at my disposal to stop this little app from surfing un filtered etc.

Any help greatfully recevied...

-Jaggie
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Commented:
You can block it using Domain group policy, under software restrictions, hash rule.

Author

Commented:
Can you give me some more information on exactly what I need to do..
Thanks,
-Jaggie

Commented:
Check these links

http://support.microsoft.com/kb/324036

http://technet.microsoft.com/en-us/library/bb457006.aspx

http://technet2.microsoft.com/windowsserver/en/library/ad3b6293-4a22-46a5-a95b-7c50ca1fd1fb1033.mspx

If you need a step by step procedure i can give that to you.

Do you have a domain? if so, is it windows based? 2000 or 2003?

Author

Commented:
W2k3 Domain, Shall have a look through your links and get back to you.
-Jaggie

Commented:
Ok sure, take your time. If any more help needed i will be glad to help.
Commented:
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Author

Commented:
Thanks, We got an SSL card for the Bluecoat and we can now block ultrasurf to our hearts content..! Nasty little app for admins!
Hi,

Even if you don't have ssl card, you may only allow the allowed categories in BCWF and deny the rest. i.e. default deny policy.

This will work since you only need to block based on IPs which are configurable even without ssl interception.

best of luck..

Commented:
I have a script I created that blocks write access to a certain part of the user registry. Ultrasurf needs to be able set it's own address as a proxy in windows. My blog explains it in more detail http://www.chrisleblanc.org/block-ultrasurf-workstation-level-windows/

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