Ports Required by Office Communications Server

Ports Required by Office Communications Server

The following table summarizes the ports and protocols used by Office Communications Server servers and clients.

Component (Server role or client)	Port	Protocol	Notes
Front End Servers	5060/5061	TCP MTLS	Used by Standard Edition Servers and Enterprise pools for all internal SIP communications between servers and between servers and Office Communicator
Front End Servers	443	HTTPS	Communication from front-end servers to the Web farm FQDNs (the URLs used by Web Components)
Front End Servers	444	HTTPS	Communication between the focus (Office Communications Server component that manages conference state) and the conferencing servers
Front End Servers	135	DCOM and RPC	Used when a load balancer is deployed, port 135 is used by the Front End Servers for WMI operations and moving users (a remote DCOM-based database operation)
Web Components	443	TCP	HTTPS traffic to the pool URLs
Web Conferencing Server	443	TLS	HTTPS communications to Web Components Servers
Web Conferencing Server	444	TLS	HTTPS between the Web Conferencing Server and the Front End Server
Web Conferencing Server	8057	TLS	Used to listen to direct PSOM connections from Live Meeting client
A/V Conferencing Server	5063	TCP	Used for incoming SIP listening requests
A/V Conferencing Server	49152 – 65535 media port range	UDP	Port range used for media requests sent.
Reverse Proxy	443	TCP	Used for SIP/TLS communications from external users on both the internal and external firewalls for external user access
Access Edge Server	5061	TCP	Used for SIP/MTLS communication for remote user access or federation.
Access Edge Server	443	TCP	Used for SIP/TLS communication for remote user access
Web Conferencing Edge Server	8057	TCP	Used to listen for PSOM/MTLS communications from the Web Conferencing Server on the internal interface of the Web Conferencing Edge Server
Web Conferencing Edge Server	443	TCP	Used for inbound communications for access of remote, anonymous and federated users to access internal Web conferences
A/V Edge Server	443	TCP	Used for STUN/TCP inbound and outbound media communications to allow external users to access media and A/V sessions
A/V Edge Server	5062	TCP	Used for SIP/MTLS authentication of A/V users. Communications flow outbound through the internal firewall.
A/V Edge Server	3478	UDP	Used for STUN/UDP inbound and outbound media communications
A/V Edge Server	50,000-59,999	RTP/TCP	Used for inbound and outbound media transfer through the external firewall.
Office Communicator	5060	TCP (SIP)	Used by Office Communicator for SIP communications internally
Office Communicator	5061	TCP (SIP)	Used by Office Communicator for SIP communications internally and for SIP/MTLS authentication of A/V users. Communications flow outbound through the internal firewall
Office Communicator	443	TCP (HTTP)	Used by Communicator clients connecting from outside the intranet for SIP communications
Office Communicator	1024-65535	UDP/TCP	Port range used for inbound and outbound media transfer through the external firewall.
Office Communicator	6891-6901	TCP	Port ranged used by Office Communicator for file transfer.
Live Meeting 2007 client	443	TCP	Used by Live Meeting 2007 clients connecting from outside the intranet for: SIP traffic sent to the Access Edge Server PSOM traffic sent to the Web Conferencing Edge Server
Live Meeting 2007 client	8057	TCP	Used for outgoing PSOM traffic sent to the Web Conferencing Server
Live Meeting 2007 client	5061	TCP	Used for SIP/TLS communication between Live Meeting and the Front End Servers or the Access Edge Server and for SIP/MTLS authentication of A/V users. Communications flow outbound through the internal firewall
Live Meeting 2007 client	1024-65535	UDP/TCP	Port range used for inbound and outbound media transfer through the external firewall
Live Meeting 2007 client	6891-6901	TCP	Port ranged used by Live Meeting for file transfer

Pasted from <http://technet.microsoft.com/en-us/library/bb870402.aspx>