Login to domain

[Harry Palmer]

I have a Win 2k server in my main office.
My office is connected to the main office by a VPN. We
just changed T1 suppliers and installed new hardware.
Some of the PCs log onto the domain fine, some say they
cannot find a domain controller and logon using cached
credentials.

All are configured the same, running NT4SP4 or above and
using DHCP from the Router/Firewall/VPN. They all can
ping the WINS servers in the main office.

Any ideas? How should I go about troubleshooting? Any
help would be greatly appreciated.

Thanks in advance for any assistance you can give me.

 

[Arild Bakken]

I have a Win 2k server in my main office.
My office is connected to the main office by a VPN. We
just changed T1 suppliers and installed new hardware.
Some of the PCs log onto the domain fine, some say they
cannot find a domain controller and logon using cached
credentials.

All are configured the same, running NT4SP4 or above and
using DHCP from the Router/Firewall/VPN. They all can
ping the WINS servers in the main office.

Any ideas? How should I go about troubleshooting? Any
help would be greatly appreciated.

Thanks in advance for any assistance you can give me.

check that all servers point to the same DNS. Also check that the following
ports are open:

DNS: 53 tcp/udp
Kerberos: 88 tcp/udp
RPC: 135 tcp/udp
Netbios NS: 137 tcp/udp
Netbios DS: 138 udp
Netbios SS: 139 tcp
LDAP: 389 tcp/udp
LDAP o/SSL: 636 tcp *
SMB: 445 tcp/udp
RPC AD: 1026 tcp **
Global Cat: 3268 tcp
GC o/SSL: 3269 tcp *


* may not be required
** requires that the AD rcp service is fixed to that port


Arild