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Port Number to Join NT Domain

By naturale02 ·
I place a firewall front of NT server, what port number should I open so the client can join the NT domain?
Thank You.

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by rindi1 In reply to Port Number to Join NT Do ...

If you have the possibility to use VPN with your firewall (Many firewalls have VPN functionality built in), I advise you to use the VPN. That way you don't need to open any extra Firewall Ports. Your login to your domain will also be more secure because you have to first connect to your VPN, creating a secure tunnel between yourself and your network and only after that you can connect to your server. That way you will also have the same IPs as you would have when you are in the LAN.

If you have to connect directly to your domain, try the following ports (It may not be necessary to open all of them, it depends on your servers security settings, etc, so you will have to try them.):

netbios 136 tcp/udp, 138 udp, 139 tcp
DNS 42, 53 tcp/udp
LDAP 389 tcp
LDAPS 636 tcp
Kerberos 88, 464, 749, 750 tcp/udp
microsoft-DS 445 tcp/udp
Wins 1512 tcp/udp

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