it is not recommended to install DC on a multihomed server. If this is your only server and must to have DC with NAT, you may want to disable NAT/VPN and re-do it. this may help,
http://www.chicagotech.net/nameresolutionpnvpn.htm
Connection issues on DC, ISA, DNS and WINS server as VPN server
Symptom: You have a Windows 2000/2003 server is configured as VPN running DNS, WINS, you may experience some connection issues. 1) the internal computers can't ping the server by name; 2) if the server is a DC and Master Browser, you may have a computer browsing issue; 3) you may receive Event ID: 4319 - A duplicate name has been detected on the tcp network; 4) You may receive error messages like "No Logon Servers Available to Service your Logon Request" when you try to open file shares or map network drives to the Routing and Remote Access server; 5) if the server is also a DC, you may not be able to logon the domain; 6) if the server is also running ISA, you cannot browse the Web from client computers on the local network, regardless of whether the computers are configured to use Web Proxy or the Microsoft Firewall Client. For example, "The page cannot be displayed" may appear in the Web browser with a "cannot find server or DNS" error message.
Cause: When a VPN client connects to the VPN server, the server creates a PPP adapter to communicate with the remote computer. The server may then register the IP address of this PPP adapter in the DNS or the WINS database. When the internal computers try to connect to the IP address of the PPP adapter, them cannot reach the PPP adapter, then the connections fail.
Don't send e-mail or reply to me except you need consulting services. Posting on MS newsgroup will benefit all readers and you may get more help.
Bob Lin, MS-MVP, MCSE & CNE
How to Setup Windows, Network, Remote Access on
http://www.HowToNetworking.com
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
This posting is provided "AS IS" with no warranties.
"Ing G Medina via WinServerKB.com" <(E-Mail Removed)> wrote in message news:ad4210afca9d4375b585b501bda16f59@WinServerKB. com...
I have a 2003 Server SP1 unique domain in my netkork.
Services: DNS, RRAS (VPN And Internet Sharing via NAT), AD, WINS, DHCP,
Kerios Mail Server, Firebird Server.FileServer/ PrintServer.
Hardware: 3 IDE Hard Disk. 1 Sata Hard Disk. 1 DVD+/-R.
1 GB Dual Chanel Memory PC400 DDR. CPU P4 3.0 HT 1 MB Cache
INTEL 865GBL MotherBoard (Video / Lan).
NIC LinkPro 10/100/1000 PCI. (Local Network)
Internet: ADSL Via Integrated NIC.
Problem: loss of network connectivity every certain time.
(1 or 2 times at week).
Without apparent reason. No event is recorder.
No ping server-workstation either workstations-server.
Only restarting server recover connection.
the "power saver" features of all the Nics are disabled.
Workstations: P4 (Windows XP SP1 / SP2)
NEED HELP. The server is my systems heart.
--
Message posted via
http://www.winserverkb.com
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