Question : Dual network adapter problems

I have installed a second network adapter into my server to handle VPN connections.  The 1st NIC is configured to the local private LAN and the 2nd to the ISP as a static IP configuration.  The problem is that the server has slowed down extememly and wont start MS Exchange and says the domain controller cannot be found and so on.  I do get internet connectivity on NIC2 thats set as the statis IP from my ISP.  Whats going on here and how do I fix it???

Answer : Dual network adapter problems

what services is the DC running? It is not recommended to multi home a WINS server
Now as far as multi homed, this should help


http://support.microsoft.com/directory/article.asp?ID=KB;EN-US;Q262397

When two network adapters are present in a computer (multihomed), a default gateway should only be assigned

to one of the network adapter's TCP/IP properties. If one of the network adapters is used to connect

to the Internet, the default gateway should be assigned to that network adapter. In many cases, the

default gateway, as well as the other necessary TCP/IP information is assigned automatically by the

Internet Service Provider by using Dynamic Host Configuration Protocol (DHCP). This can be confirmed

by using the IP Configuration utility (Winipcfg.exe) to view the TCP/IP properties for the network adapter

you are using to connect to the Internet.

For the network adapter that is connected only to the Local Area Network (LAN), such as a home or corporate

network, a static routing entry must be entered into the computer's routing table if the computer needs

to obtain access to network resources across a router or multiple routers. For example, if the router

interface on the same subnet has an IP address of 192.168.1.1 and the router is connecting the 192.168.1.0

network to a 201.115.1.0 network, the following command would need to be entered either at a command

prompt within Windows or from a batch file:

ROUTE ADD 201.115.1.0 MASK 255.255.255.0 192.168.1.1

This command instructs Windows to send all traffic that is destined for the 201.115.1.0 network to the

192.168.1.1 interface on the router. To verify that the ROUTE ADD command was successful, use the ROUTE

PRINT command to view the current routing table. If multiple routers are being used on the LAN segment,

a separate ROUTE ADD is needed for each router.

Note that the routing entry is not persistent in Windows 98/95, even with the -p switch, and is lost

after you restart the computer. To have this entry automatically added for every Windows session, create

a batch file with the necessary ROUTE ADD command(s) and place it in the Windows StartUp folder to be

executed each time Windows starts.

If DHCP is used to assign IP addresses on the LAN, the DHCP server should be configured to not provide

a default gateway.