50,000 - 59,999 Port Range
Communications Server 2007 R2
Topic Last Modified: 2009-10-19
The A/V Edge service requires the port range from 50,000 through 59,999 to be open outbound for TCP for federation.
Additionally, if you will be federating with organizations that run Office Communications Server 2007 and earlier, you must open this 50,000 to 59,999 port range for both RTP/TCP and RTP/UDP, and for both inbound and outbound connections.
If you will be federating only with organizations that run Office Communications Server 2007 R2, you need only to open this port range for RTP/TCP, only for outbound connections.
Otherwise, if you will not be sharing audio/video over a federated relationship, you can close this port range.
Note: Closing 50,000-59,999 prevents A/V conferencing between an Office Communications Server 2007 federated domain and an Office Communications Server 2007 R2 federated domain, but A/V conferencing between two Office Communications Server 2007 R2 federated domains can still take place over port 3478 (UDP) or port 443 (TCP).