Block Skype on Your Network
With the news last week that a subsidiary of China Telecom was blocking Skype, I wondered when the next announcement of someone blocking Skype would come. I didn't have to wait long. At VON this week, Verso Technology announced that they now have a solution for monitoring and blocking Skype. Here is my article on the Advanced IP Pipeline website --
"Verso Appliance Lets Enterprises Block Skype"
According to Verso's man on the show floor, John O'Reilly, blocking Skype is actually a really hard problem. He tells me that Skype jumps around trying different ports and protocols to find a way through your firewall. I'd love to hear from someone who knows if this is really true...
4 Comments:
I know only one method to block skype... blocking https...
See this doc:
analysis of the skype P2P protocol
check this out, if you want to block skype
http://ciscotips.wordpress.com/2006/06/07/how-to-block-skype/
Blocking skype is one thing, but what if you want to use it despite the port crawling, tunneling and AES encryption?
I know the Facetime appliance was blocks Skype and P2P, one of the first I think to crack Skype, but if Skype wants to get enterprise adoption they are going to have to let people manage it...at least for HIPPA or SOX or companies who answer to that crap.
there is a widely used skype and P2P blocking solution in opensource.
check this link http://www.lynanda.com/products/software-for-corporations/traffic-filtering
I've heard that this solution is what companies use to forbid skype within their network. China is suspected to use this or a derivative
I think that providing that kind of censorship technology is in total contradiction with the opensource philosophy. Some people suspect Skype to be at the origin of this blocking initiative, for political reasons.
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