Can W2K NAT server pass an external assigned IP into internal network?

[rmrfhomeoops]

Currently I'm running Windows 2000 server that masquerades my network of PCs connected to @home cable modem. So basically the network is like:

Cable Modem <-> PC running W2K NAT server <-> Switch <-> All of my other PCs connected to the switch

Works fine as all of the PCs now gets private IP address. I'm in the process of getting another IP address from @home and would like that Windows 2000 server to pass the new IP address from @home to the PC behinds it. My purpose is to allow the internal PCs that receive the new @home IP address to run as a game server. It's my brother's gaming machine basically. He wanted to connect to the battle.net, plays tactical OPs, unreal, Runes etc...

Cable Modem <-- assigns 2nd IPs --> W2K Nat Server <-- pass 2nd IPs to internally to a specific machine--> switch-> PC?

Doable? Any help would be appreciated...

 

[bignick]

I have the same exact setup, and I am going to say no. To the best of my knowledge the RRAS doesn't have dynamic NAT abilities. For a quickie explanation of dynamic nat go here.

What I would do is add an additional hub/switch so that the cable modem plugged in to it. Then your gaming server and NAT server would plug into the additional hub/switch. This is kinda what it would look like:

(cable modem)
|
(hub/switch)---(Win2k NAT server)---(switch)--(private lan)
|
(gaming server)

forgive if my diagram looks screwed up.

but of course i could just be talking out my a-double-scribble :-0

 

[rmrfhomeoops]

That's what I thought. But I think I'll get another IP first and then see if Windows NAT will allow it to bind to a specific ethernet MAC address. That way all the request for 2nd IP address will be forwarded directly to that specific PC inside the network.

Thanks

 

[her209]

So there is no port forwarding option using Win2K? My suggestion is to buy a hardware router (pretty cheap now and in the long run compared to extra IP address) and have the router forward all the incoming packets on a specific port (e.g. 27015 for C.S.) from the outside to the Gaming Machine.

New diagram
Cable Modem-----Hardware Router-----Switch-----Computers

 

[bignick]

There is port forwarding in Win2k's RRAS, but the original post was about having two external IP's. Therefore having two exposed hosts to the internet.

I still think the easiest thing to do is to go with the additional hub/switch, as in my original post. This is how one of my clients is setup, with one exception. Both servers have two NICs and plug into the external hub, and internal hub. This is because I have my clients SQL server on the private network running Netbeui.

 

[Russ]

Bignick's suggestion will work perfectly. It is the way my network is setup, except that I have a router doing the NAT rather then a server.

Diagram here.

Russ, NCNE

 

[Glendor]

I had it working like that too.

 

[Nothinman]

It should be possible to bind 2 IPs to one NIC and forward requests to that IP on to an internal box, like port forwarding only for all ports on a specific IP, I don't know if Win2K has such functionality built it would probably be pretty easy to do with iptables in Linux =)

If I had 2 IPs I'd give it a try...