topic Re: Block Chat Skype in Network Security https://community.cisco.com/t5/network-security/block-chat-skype/m-p/813784#M969901 <HTML><HEAD></HEAD><BODY><P>No, PIX cannot block Skype. Skype has the capacity to negotiate dynamic ports, and to use encrypted traffic. With encrypted traffic, it's virtually impossible to detect it as there are no patterns to look for. You could eventually use a Cisco IPS (Intrusion Prevention System). It has some signatures that are able to detect a Windows Skype Client that connects to the Skype server to synchronize its version.</P></BODY></HTML> Wed, 12 Sep 2007 20:18:35 GMT didyap 2007-09-12T20:18:35Z Block Chat Skype https://community.cisco.com/t5/network-security/block-chat-skype/m-p/813783#M969900 <P>As I Can Block out ports Of chat software SKYPE.. I have a 505 PIX Cisco</P> Mon, 11 Mar 2019 11:07:52 GMT https://community.cisco.com/t5/network-security/block-chat-skype/m-p/813783#M969900 abel.estacio.roldan 2019-03-11T11:07:52Z Re: Block Chat Skype https://community.cisco.com/t5/network-security/block-chat-skype/m-p/813784#M969901 <HTML><HEAD></HEAD><BODY><P>No, PIX cannot block Skype. Skype has the capacity to negotiate dynamic ports, and to use encrypted traffic. With encrypted traffic, it's virtually impossible to detect it as there are no patterns to look for. You could eventually use a Cisco IPS (Intrusion Prevention System). It has some signatures that are able to detect a Windows Skype Client that connects to the Skype server to synchronize its version.</P></BODY></HTML> Wed, 12 Sep 2007 20:18:35 GMT https://community.cisco.com/t5/network-security/block-chat-skype/m-p/813784#M969901 didyap 2007-09-12T20:18:35Z