Question

How to block ultrasurf?

Asked by: JohnGerhardt

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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Asked On
2008-02-11 at 07:23:15ID23153176
Tags

ultrasurf

,

blocking

,

bluecoat

Topic

Enterprise Firewalls

Participating Experts
3
Points
500
Comments
8

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Answers

 

by: infernumPosted on 2008-02-17 at 06:32:56ID: 20914099

You can block it using Domain group policy, under software restrictions, hash rule.

 

by: JohnGerhardtPosted on 2008-02-18 at 11:39:41ID: 20922737

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

 

by: infernumPosted on 2008-02-18 at 12:00:16ID: 20922932

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?

 

by: JohnGerhardtPosted on 2008-02-19 at 00:18:17ID: 20926542

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

 

by: infernumPosted on 2008-02-19 at 01:07:41ID: 20926742

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

 

by: gbw48Posted on 2008-04-16 at 11:25:21ID: 21370604

Jaggie,
Are you using SSL intercept on Bluecoat. If you are then you should be able to block all SSL traffic that is non categorized which ultra surf's servers are.

 

by: JohnGerhardtPosted on 2008-06-21 at 03:59:12ID: 31429812

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

 

by: solutiontrackerPosted on 2011-01-12 at 03:34:45ID: 34533708

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..

20120131-EE-VQP-002

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