1. What is Skype?

Skype is software that enables you to make free video and conference calls, send instant message and share files with other Skype users. Skype uses both TCP and UDP to communicate with dynamic ports, which makes it difficult to block it. For more details about skype protocol, please check: Skype protocol.

2. How block Skype with Wfilter ?

WFilter makes it simple to block skype traffic in your network from a central server. However, because WFilter is a pass-by filtering product, it can only detect and block skype TCP traffic. So you also need to block UDP ports 1024-65534 in your router of firewall. For more information about “pass-by filtering”, please check: What is the difference between passby filtering and passthrough filtering?

(1) Add a blocking level and enable “Block Skype”