the protocols&ports required for win2000 DCs' synchronize

[seraph]

We will setup some win2000 DCs in our network environment,
but the firewall separate those DCs.
Which ports should be allowed to let the DCs can
communicated with each other successfully?
I am not sure the list below is suitable.


UDP/TCP 53 (DNS)
UDP/TCP 88 (Kerberos authentication)
TCP 123 (Network Time Protocol-NTP)
TCP 135 RPC
TCP 445 (Microsoft Directory Service)

 

[Phillip Windell]

By the time you'd do that, there isn't much point in having the firewall.