Ports Requirments for Active Directory

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Port Protocol Usage Type of traffic
389 TCP and UDPDirectory, Replication, User and Computer Authentication, Group Policy, TrustsLDAP
636 TCPDirectory, Replication, User and Computer Authentication, Group Policy, TrustsLDAP SSL
3268 TCPDirectory, Replication, User and Computer Authentication, Group Policy, TrustsLDAP GC
3269 TCPDirectory, Replication, User and Computer Authentication, Group Policy, TrustsLDAP GC SSL
88 TCP and UDPUser and Computer Authentication, Forest Level TrustsKerberos
53 TCP and UDPUser and Computer Authentication, Name Resolution, TrustDNS
445 TCP and UDPReplication, User and Computer Authentication, Group Policy, TrustsSMB,CIFS,SMB2, DFSN, LSARPC, NbtSS, NetLogonR, SamR, SrvSvc
25 TCPReplicationSMTP
135 TCPReplicationPC, EPM
TCP Dynamiceplication, User and Computer Authentication, Group Policy, TrustsRPC, DCOM, EPM, DRSUAPI, NetLogonR, SamR, FRS
5722 TCPRPC, DFSR (SYSVOL)

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