As portas que terão que ser liberadas em eventuais mecanismos de proteção (firewall) são:

 

- Para o NetMeeting (ou outro cliente H.323)

• TCP Port 7648: This port is used for CU-SeeMe connections to the MPCS.
• UDP Port 7648: This port is used for sending/receiving CU-SeeMe Video Chat  streams.
• UDP Port 24032: This port is used for sending/receiving RTP audio and video streams for CU-SeeMe.
• TCP Port 1503: This port is used for T.120 Client connections.
• TCP Port 1720: This port is used for H.323 call signaling.
• UDP Port 56800: This port is used for sending/receiving RTP video streams  for clients that support RTP on separate ports.
• UDP Port 1424: This port is used for routing H.323 audio streams to  third-party streaming applications.
• UDP Port 1414: This port is used for routing H.323 video streams to  third-party streaming applications.
• UDP Ports 40000-50000


- Para o RealPlayer
 

• 7070 (TCP e UDP)
• 554 (TCP e UDP)
• 8080 (TCP)
• 6970-6999 (UDP)


- Para o Microsoft Chat

• porta: 6667