NT 4.0 as a router Hmm

[rewas]

Our organisation has a growing network with the result that we now need more IP's ie another class C, so I put another NIC in our PDC and BDC. The present configuration now looks like this

PDC NIC 1 - 200.5.5.10 255.255.255.0 Gateway 200.5.5.37
PDC NIC 2 - 200.5.6.10 255.255.255.0

BDC NIC 1 200.5.5.11 255.255.255.0
BDC NIC 2 200.5.6.11 255.255.255.0

As we run MS Proxy on the PDC all users are able to get Internet Services via Proxy, all users are able to Log on run Logon Scripts - in fact everything (almost) works well. My problem is this - our mail server (a Cobalt Cube) is 200.5.5.6 therefore all users on 200.5.5.0 network can access it no problem, however users on the 200.5.6.0 network cannot get mail.

I have tried various Add Route (s) on the PDC but again to no avail, I have IP forwarding checked on both the PDC and BDC, I am at this point "stumped". Can you help. [sig][/sig]

 

[Pritch5000]

Firstly I wouldn't have thought you'd need both domain controllers to be routing. And I'm wandering whether there is a loop in there somewhere.

Curiously what is the gateway 200.5.5.37, a wide area router?

More to the point tho.
Your clients on the 200.5.6.0 network would need the local area router's address as the default gateway and not the wide area's.

I am a bit more concerned as to why you're doing this. Do you really want your server's power put to routing packets?

How many clients and how many networks do you have? Would you not just be better off changing the class to a 'B' throughout? and maybe perhaps install a DHCP server to take care of it all?
Pritch. [sig][/sig]

 

[DiscoDuane]

Why not use the private IP ranges??? with a NAT for Internet Access

 

[mtravers]

Also, beware of degradation of using a server as a router. It can be done but as a rule "let routers route and servers serve". I agree with DiscoDuane in that you should look into using a private IP range and elimnate the limitations of a single class C license.