Ports Used By Active Directory


Windows Active Directory Domain Controllers use the following ports:

DescriptionPort NumbersProtocol
LDAP389TCP + UDP
LDAP SSL636TCP
LDAP GC3268TCP
LDAP GC SSL3269TCP
Kerberos88TCP + UDP
DNS53TCP + UDP
SMB,CIFS,SMB2, DFSN, LSARPC, NbtSS, NetLogonR, SamR, SrvSvc445TCP + UDP
TCP Dynamic - User and Computer Authentication, Group Policy49152-65535TCP
Windows Time123UDP
RPC5722TCP
UDP Dynamic - Group Policy (DCOM, RPC, EPM)49152-65535UDP
Group Policy, Netlogon, NetBIOS Datagram Service138UDP
User and Computer Authentication - NetLogon, NetBIOS Name Resolution137UDP
User and Computer Authentication - NetBIOS Session Service, NetLogon139TCP
User and Computer Authentication, Kerberos change/set password464TCP + UDP

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