If you enable the Windows Firewall or if there is an external Firewall for your Active Directory Domain Services (ADDS) in this case Domain Controller Server, you need to set up the allowed port for Domain Controller corectly. The table below will show you all ports that needed for domain controller.
| TCP and UDP 389 | Directory, Replication, User and Computer Authentication, Group Policy, Trusts | LDAP |
| TCP 636 | Directory, Replication, User and Computer Authentication, Group Policy, Trusts | LDAP SSL |
| TCP 3268 | Directory, Replication, User and Computer Authentication, Group Policy, Trusts | LDAP GC |
| TCP 3269 | Directory, Replication, User and Computer Authentication, Group Policy, Trusts | LDAP GC SSL |
| TCP and UDP 88 | User and Computer Authentication, Forest-Level Trusts | Kerberos |
| TCP and UDP 53 | User and Computer Authentication, Name Resolution, Trusts | DNS |
| TCP and UDP 445 | Replication, User and Computer Authentication, Group Policy, Trusts | SMB,CIFS,SMB2, DFSN, LSARPC, NbtSS, NetLogonR, SamR, SrvSvc |
| TCP 25 | Replication | SMTP |
| TCP 135 | Replication | RPC, EPM |
| TCP Dynamic | Replication, User and Computer Authentication, Group Policy, Trusts | RPC, DCOM, EPM, DRSUAPI, NetLogonR, SamR, FRS |
| TCP 5722 | File Replication | RPC, DFSR (SYSVOL) |
| UDP 123 | Windows Time, Trusts | Windows Time |
| TCP and UDP 464 | Replication, User and Computer Authentication, Trusts | Kerberos change/set password |
| UDP Dynamic | Group Policy | DCOM, RPC, EPM |
| UDP 138 | DFS, Group Policy | DFSN, NetLogon, NetBIOS Datagram Service |
| TCP 9389 | AD DS Web Services | SOAP |
| UDP 137 | User and Computer Authentication, | NetLogon, NetBIOS Name Resolution |
| TCP 139 | User and Computer Authentication, Replication | DFSN, NetBIOS Session Service, NetLogon |
If you also deploy the DHCP service in domain controller, you also need to allow the ports that needed for DHCP service.
For more detail about the ports that needed on windows server, you can try the following link https://support.microsoft.com/en-in/help/832017/service-overview-and-network-port-requirements-for-windows
