Question about Computers & Internet
UltraSurf is a hard one to block from ISA itself because it uses the local host computer through port 9666 as it’s proxy to intercept browser requests and encrypt them through 443/SSL traffic through your corporate proxy server. UltraSurf uses a network of anonymous proxies like Botnets that can change dynamically at any given time.
So how can you successfully block it? Well I don’t know if you can totally but you may be able to deter it a bit.
A few ways are:
Policy – Do you have an acceptable use policy in-place? If you do then I would think the threat of job loss and termination should be a darn good deterrent.
At the local host – Using group policy, restrict access to the local host site in IE. That would be 127.0.0.1 and Ultra1 that it resolves to. If you have the capability, restrict TCP port 9666 on the local host outbound. Setting software restriction in group policy is another to prevent the UltraSoft application from running.
On the ISA – Go to http://www.isaserver.bm and download Steve’s blocking anonymous domain sets and configure a deny access rule to help block anonymous proxy access. You won’t totally stop access but the list will defiantly put a damper on accessing the most popular sites.
Collective software ClearTunnel is another ISA add-on to help uncover scrupulous activity.
Save a tree.
Posted on Apr 28, 2010
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get to try the service completely Free afterwhich it costs $6 per call and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Nov 12, 2015 | Computers & Internet
May 31, 2010 | Facebook Social Network
May 14, 2010 | Juniper Networks (SSG-5-SH-BT) Firewall
Feb 09, 2010 | NetGear ProSafe FVG318 (606449041668)...
Oct 01, 2009 | Computers & Internet
Jul 27, 2009 | Facebook Social Network
1,382 people viewed this question
Usually answered in minutes!