Cisco TelePresence - Device Authentication Port Reference; H.350 Directory Service; Active Directory (Direct)

Device authentication port reference
H.350 directory service
The following table lists the ports used for device authentication between VCS and the H.350 server. They
are configurable via Configuration > Authentication > Devices > H.350 directory service.
Purpose VCS port Destination port
H.350 LDAP server TCP ephemeral port TCP/389 or TCP/636
Active Directory (direct)
The following table lists the ports used for device authentication between VCS and the AD system. They are
configurable via Configuration > Authentication > Devices > Active Directory Service.
Purpose VCS port Destination port
Kerberos Key Distribution Center UDP ephemeral port 88 UDP
Kerberos TCP ephemeral port 88 TCP
VCS with Domain Controller (CLDAP) UDP ephemeral port 389 UDP
VCS with Domain Controller (LDAP) TCP ephemeral port 389 / 636 TCP
Client credential authentication with the Domain
Controller (Microsoft-DS). VCS initially tries port 445,
but if that cannot be reached it tries port 139.
TCP ephemeral port 445 / 139 TCP
Cisco VCS Administrator Guide (X8.1.1) Page 399 of 507
Reference material
Device authentication port reference