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Ports and Protocols in OCS 2007 R2 (08-Feb-09)
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 80 TCP Communication from front-end servers to the Web farm FQDNs (the URLs used by Web Components) when HTTPS is not used
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)
Front End Servers 5062 TCP Used for incoming SIP listening requests for IM conferencing
Front End Servers 5063 TCP Used for incoming SIP listening requests for A/V conferencing
Front End Servers 5064 TCP Used for incoming SIP listening requests for telephony conferencing
Front End Servers 5065 TCP Used for incoming SIP listening requests for application sharing
Front End Servers 5071 TCP Used for incoming SIP listening requests for Response Group Service
Front End Servers 5072 TCP Used for incoming SIP listening requests for Conferencing Auto Attendant
Front End Servers 5073 TCP Used for incoming SIP listening requests for Conferencing Announcement Server
Front End Servers 5074 TCP Used for incoming SIP listening requests for Outside Voice Control
Front End Servers 8057 TLS Used to listen to direct PSOM connections from Live Meeting client
Front End Servers 8404 TLS Used for internal server communications (remoting over MTLS) for Response Group Service
Front End Servers 49152-65335 UDP Used for media port range
Load Balancer for 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
     
     
Load Balancer for Front End Servers 443 HTTPS Communication from front-end servers to the Web farm FQDNs (the URLs used by Web Components)
Load Balancer for Front End Servers 444 HTTPS Communication between the focus (Office Communications Server component that manages conference state) and the conferencing servers
Load Balancer for 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)
Load Balancer for Front End Servers 5065 TCP Used for incoming SIP listening requests for application sharing
Load Balancer for Front End Servers 5069 TCP Used for Monitoring Server
Load Balancer for Front End Servers 5071 TCP Used for incoming SIP listening requests for Response Group Service
Load Balancer for Front End Servers 5072 TCP Used for incoming SIP listening requests for Conferencing Auto Attendant
Load Balancer for Front End Servers 5073 TCP Used for incoming SIP listening requests for Conferencing Announcement Server
Load Balancer for Front End Servers 5074 TCP Used for incoming SIP listening requests for Outside Voice Control
Communicator Web Access Server 80 HTTP Used if HTTPS is not configured
Communicator Web Access Server 88   Used for Kerberos authentication
Communicator Web Access Server 137   Used for NetBios Name Service
Communicator Web Access Server 138   Used for NetBios for Datagram Service
Communicator Web Access Server 139   Used for NetBios for Session Service
Communicator Web Access Server 389   Used for LDAP on the DC
Communicator Web Access Server 443 HTTPS HTTP over TLS or SSL
Communicator Web Access Server 3268   Used for LDAP on the GC
Communicator Web Access Server 5061 TCP/UDP Used for SIP traffic
Group Chat Server 49152-65335   Used for session ports (10 randomly chosen)
       
Group Chat Server 443 HTTP  
Group Chat Server 8010   Used for peer server synchronization/WCF ports for the Lookup Server
Group Chat Server 8011   Used for peer server synchronization/WCF ports for the Channel Server
Group Chat Server 5041 TCP Used for listening port for channel service
Group Chat Server 5061 TCP Used to communicate to internal servers using SIP/TLS
Monitoring Server 135 MSMQ  
Monitoring Server 5069   Used when a Front End load balancer is used
Archiving Server 135 MSMQ  
Director 5060/5061 TCP Used for internal communications between servers
Load Balancer for Director 5060/5061 TCP Used for internal communications between servers
Mediation Server 60000-64000 TCP Used for media port range
Mediation Server 5061 TCP Used for listening
Mediation Server 5060 TCP Used for gateway listening port and next hop
Reverse Proxy 443 TCP Used for SIP/TLS communications from external users on both the internal and external firewalls for external user access
Edge Server 5061 TCP Used for SIP/MTLS communication for remote user access or federation.
Edge Server 5062 TCP Used for SIP/MTLS authentication of A/V users. Communications flow outbound through the internal firewall.
Edge Server 443 TCP Used for SIP/TLS communication for remote user access, accessing internal Web conferences, and STUN/TCP inbound and outbound media communications for accessing internal media and A/V sessions
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
Edge Server 3478 UDP Used for STUN/UDP inbound and outbound media communications
Edge Server 50,000-59,999 RTP/TCP Used for inbound and outbound media transfer through the external firewall.
Load Balancer for Consolidated Edge Server 443 TCP Used for internal ports for SIP/TLS communication for remote user access, accessing internal Web conferences, and STUN/TCP inbound and outbound media communications for accessing internal media and A/V sessions
Load Balancer for Consolidated Edge Server 5061 TCP Used for internal ports for SIP/MTLS communication for remote user access or federation
Load Balancer for Consolidated Edge Server 5062 TCP Used for internal ports for SIP/MTLS authentication of instant messaging communications flowing outbound through the internal firewall
Load Balancer for Consolidated Edge Server 3478 UDP Used for internal ports for STUN/UDP inbound and outbound media communications
Load Balancer for Consolidated Edge Server 443 TCP Used for external ports for SIP/TLS communication for remote user access, accessing internal Web conferences, and STUN/TCP inbound and outbound media communications for accessing internal media and A/V sessions
Load Balancer for Consolidated Edge Server 5061 TCP Used for external ports for SIP/MTLS communication for remote user access or federation
Load Balancer for Consolidated Edge Server 3478 TCP Used for external ports for STUN/UDP inbound and outbound media communications
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
2007 R2 version of Communicator Mobile 5060 TCP SIP) Port ranged used by Communicator Mobile for SIP communications internally
2007 R2 version of Communicator Mobile 5061 TCP SIP) Port ranged used by Communicator Mobile for SIP over TLS communications internally
2007 R2 version of Communicator Mobile 443 TCP (HTTP) Used by Communicator Mobile for connecting from outside the intranet for SIP communications


 
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