Active Directory Firewall Ports

Hello all,

Hope this post finds you in good health and spirit.

This post is regarding what all Ports are required by Domain Controllers and Client Computers?

Active Directory using several ports to communication between domain controllers to clients. These ports are required by both client computers and Domain Controllers. As an example, when a client computer tries to find a domain controller it always sends a DNS Query over Port 53 to find the name of the domain controller in the domain.

  • 53- DNS
  • 88- Kerberos
  • 123- Time Service
  • 135- for domain controllers-to-domain controller and client to domain controller operations.
  • 138- For File Replication Service between domain controllers.
  • 139- For File Replication Service between domain controllers.
  • 389- For LDAP to handle normal queries from client computers to the domain controllers.
  • 445- File replication/SMB
  • 464- For change the password of user account
  • 636- secure LDAP
  • 3268- Global Catalog server
  • 3269 – Global Catalog server [Secure]
  • 5722-File replication, DFSR
  • 9389- ADDS web service
  • 53248- FRS RPC

Above mentioned ports should be opened in Firewall between client computers and domain controllers, or between domain controllers, will enable Active Directory to function properly.

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