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Ports and Protocols

Communications Server 2007 R2

Topic Last Modified: 2009-10-19

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

Dd425238.note(en-us,office.13).gifNote:
Windows Firewall must be running before you start the services on Office Communications Server, because that is when Office Communications Server opens the required ports in the firewall.

For details about firewall configuration, see Firewall Requirements for External User Access. For details on load balancer configuration, see Planning Load Balancing.

Table 1. Ports and Protocols Used by Office Communications Server 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

Used for communication from Front End Servers to the Web farm FQDNs (the URLs used by Web Components).

Front End Servers

444

HTTPS

Used for communication between the Focus (the Office Communications Server component that manages conference state) and the conferencing servers.

Front End Servers

80

TCP

Used for 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 remote procedure call (RPC)

Used when a load balancer is deployed. Port 135 is used by the Front End Servers for Windows Management Instrumentation (WMI) operations and for 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 audio/video (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

5069

TCP and MTLS

Used by QoE Agent on the Front End Server.

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 Attendant.

Front End Servers

5073

TCP

Used for incoming SIP listening requests for Conferencing Announcement Service.

Front End Servers

5074

TLS

Used for incoming SIP listening requests for Outside Voice Control.

Front End Servers

8057

TLS

Used to listen to direct Persistent Shared Object Model (PSOM) connections from a Microsoft Office Live Meeting 2007 client.

Front End Servers

8404

TLS

Used for internal server communications (remoting over MTLS) for Response Group Service.

Front End Servers

49152-65335

User Datagram Protocol (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 (the 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 for 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 by the QoE Agent on the Front End Servers.

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 Attendant.

Load balancer for Front End Servers

5073

TCP

Used for incoming SIP listening requests for Conferencing Announcement Service.

Load balancer for Front End Servers

5074

TLS

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

Kerberos

Used for Kerberos authentication.

Communicator Web Access server

389

LDAP

Used for Lightweight Directory Access Protocol on the domain controller.

Communicator Web Access server

443

HTTPS

HTTP over TLS or SSL.

Communicator Web Access server

3268

MSFT-GC

Used for LDAP on the global catalog.

Communicator Web Access server

5061

SIP

Used for SIP traffic.

Communicator Web Access

49152 to 65535

Used for desktop sharing.

Microsoft Office Communications Server 2007 R2 Group Chat Server

49152-65335

TLS

Used for SIP traffic to communicate with Office Communications Server 2007 R2 servers.

Group Chat Server

443

HTTPS

Used for secure file transfer with the Group Chat Web service.

Group Chat Server

8010

TLS

Used for peer server synchronization/WCF ports for the Lookup Server.

Group Chat Server

8011

TLS

Used for peer server synchronization/Windows Communication Foundation (WCF) ports for the Channel Server.

Group Chat Server

5041

MTLS

Used for listening port for the Channel service.

Monitoring Server

135

Message Queuing and RPC

Used for message queuing RCP operations.

Archiving Server

135

Message Queuing and RPC

Used for message queuing RCP operations.

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

UDP

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 Edge Servers

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 Edge Servers

5061

TCP

Used for internal ports for SIP/MTLS communication for remote user access or federation.

Load balancer for Edge Servers

5062

TCP

Used for internal ports for SIP/MTLS authentication of IM communications flowing outbound through the internal firewall.

Load balancer for Edge Servers

3478

UDP

Used for internal ports for STUN/UDP inbound and outbound media communications.

Load balancer for Edge Servers

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 Edge Servers

5061

TCP

Used for external ports for SIP/MTLS communication for remote user access or federation.

Load balancer for Edge Servers

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 Office 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 range 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 range used by Live Meeting for file transfer.

2007 R2 version of Communicator Mobile

5060

TCP SIP

Used by Communicator Mobile for SIP communications internally.

2007 R2 version of Communicator Mobile

5061

TCP SIP

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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