Ports Required For Active Directory Services

2009 November 5
by Paul McSharry

Depending on the network infrastructure, communication between domain controllers may pass through various routers or firewalls.

The following ports are required for Active Directory Services.

Port Protocol Function
53 UDP/TCP DNS
445 UCP/TCP File Replication Service
88 UDP Kerberos authentication
135 UDP/TCP DC to Client and DC to DC communication
139 TCP DC File Replication Service
138 UDP DC File Replication Service
389 UDP LDAP
464 UDP/TCP Kerberos Password Change
3268 TCP Global Catalog
3269 TCP Global Catalog

from → Active Directory, Ports

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