I have 2 Win 2K Server machines connected to a router (T1) that is wide open with no NAT or other network security devices. Both machines are running BlackIce firewall. Both machines have a 2nd NIC to the LAN. We are not using DHCP. We are using static IPs and there are less than 20 client machines on the LAN.
One of the Win 2K servers has RRAS running. It is also acting as a WINS server, file server, and a proxy server for the LAN. The other server is an internet server running IIS.
Here's the rub. I can connect to the VPN from my Win 2000 machine at home, (as well as a 98 machine). Even though I cannot ping any IPs on the LAN at the office (from my home machine), nor UNC names, I can "search for computers", find any machine on the office LAN through the VPN, and map network shares via that methodology...
With an XP VPN client, I can connect, I still have the same "pinging/UNC" issues, but I cannot "search for computers", and find anyone, (computers), on the VPN-LAN. It may or may not be important, but all machines on the LAN (as well as my home 2k machine) have Netbeui installed as a protocol (even the XP machine at the office). The problem (maybe) is that the XP VPN Client will not allow installation of that Netbeui protocol to the VPN network connection, while the 2k VPN client will.
And there you have it.