Skype can even use HTTPS so there's no way ISA can see its traffic signature unless you use ClearTunnel. If you can use the firewall client, then define a rule to block skype with that easiest solution. Skype is specifically designed to be nearly impossible to block, and it actively seeks out ways around anything you try (almost like malware, except not evil). īlocking Live Messenger using the HTTP setting work Superįerrix -> RE: how to Block Skype (25.Aug.2007 10:05:39 PM) You will find other signature that belong for Live messenger. How can I block this software from the ISA I add this IP and still failing and failing

I read that there is an IP for authentication server but this is almost imposibleĪnd I notice that the Skype using the Signature User-Agent: Skype 2.5 With all this Skype still connecting to another IP when it find that the IP is blocked I try to block the IP that I get from ISA and Sniffringīut every time I block IP I notice that Skype connect to another IP I have been working for about 1 month on trying to block the Skype using the ISA server and all the trys has totally fail All Forums > Access Policiesįarisnt -> how to Block Skype (25.Aug.2007 5:43:46 PM)

How to block on skype