Skype ports range, how to block Skype in network?

  Protocol:
Skype
Support: WFilter zh.4.0, WFilter en.4.0, WFilter Free 1.0
  Author: imfirewall  
      Skype is a software program of IM, it allows users to make telephone calls over the Internet to other Skype users free of charge and to landlines and cell phones for a fee. Additional features include instant messaging, file transfer, short message service, video conferencing and its ability to circumvent firewalls.  

This protocol is official supported and installed by default.

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     User name:3.135.218.90
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In pass-by filtering mode, you also need to block udp ports 1024-65534 in your router/firewall. Otherwise, skype udp traffic can not be blocked.
By 121.229.187.* on 2013-08-27 23:11:43   like( 1 ) dislike( 0 )
Doesn't block Skype.
By 87.246.6.* on 2013-08-22 04:05:58   like( 2 ) dislike( 2 )

Skype uses both TCP and UDP protocol for communication.

TCP traffic analysis

Ports Range

Local tcp port(s): 80,443,1024-65535.

Remote tcp port(s): 80,443,1024-65535.

HTTP traffic analysis

HTTP traffic is found in Skype's traffic.

It also uses a particular UserAgent(regular expression): ^(TOM-)?Skype.

TLS traffic analysis

According to our analysis, TLS connections are found in Skype's traffic.

TLS Host(s) being connected(regular expression): .messenger.live.com, .*.skype.com, skype-m.hotmail.com$, ^mobile.pipe.aria.microsoft.com$, skypeassets.com$.

UDP traffic analysis

Ports Range

Local udp port(s): 1024-65535, 1024-3128,3130-65535.

Remote udp port(s): 1024-4165,4167-65535.

  • Skype|v7.25.99.103
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