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Firewall protocols, servers, and port numbers for Yahoo Messenger

Here's the list of all protocols, servers, and port numbers to configure a firewall or proxy server for Yahoo Messenger:

Basic Connection

  • Protocol: TCP or HTTP
  • Servers: scs.msg.yahoo.com, scsa.msg.yahoo.com, scsc.msg.yahoo.com
  • Port: 20, 23, 25, 80, 119, 5050, 8001, 8002

Webcam Connection

  • Protocol: TCP
  • Server: webcam.yahoo.com
  • Port: 5100

File Transfer Connection

  • Protocol: HTTP
  • Server: filetransfer.msg.yahoo.com
  • Port: 80

File Sharing Connection

  • Protocol: HTTP
  • Port: 80

Voice Chat Connection

  • Protocol: UDP or TCP
  • Server: vc.yahoo.com
  • Ports: 5000-5010

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