| Component (Server role or client) |
Port |
Protocol |
Notes |
| Front End Servers |
5060/5061 |
TCPMTLS |
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 |
