Appendix A: Ports Used by Communicator Web Access
Microsoft Office Communications Server 2007 and Microsoft Office Communications Server 2007 R2 will reach end of support on January 9, 2018. To stay supported, you will need to upgrade. For more information, see Resources to help you upgrade your Office 2007 servers and clients.
Firewalls can block ports that are needed by Office Communicator Web Access. Table A-1 shows the ports that are used by Communicator Web Access.
Table A-1: Default Ports used by Communicator Web Access
| Port | Purpose |
|---|---|
80 |
HTTP (if not configured for HTTPS on 443) |
88 |
Kerberos |
137 |
NetBios Name Service |
138 |
NetBios Datagram Service |
139 |
NetBios Session Service |
389 |
LDAP on the DC |
443 |
HTTPS (HTTP over TLS or SSL) |
1025 through 65,535 |
Dynamically assigned for incoming traffic from Office Communication Server 2007 Server |
3268 |
LDAP on the GC |
5060 |
SIP (TCP and UDP) |
5061 |
SIP (TCP and UDP) |