Multiple IP Addresses

[Bytecon]

Originally Posted by scastle

No, in the case of 2 machines connected together, whether using crossover cable and Internet Connection Sharing or a router, then ICS or the router would use the NTL IP to communicate with the outside world, but would assign individual IPs to the PCs attached to it.

For example your NTL IP is 81.99.xx.xx, and you have two PCs running off it, one attached via the other which is running Internet Connection sharing. ICS would assign SEPERATE IPs for internal use. PC1 would be 192.168.0.1 and PC2 would be 192.168.0.2.

If you use the Internet (email, web, ftp etc) on PC2, then PC2 will send the request to PC1, which will then send the request to NTL as if the user on PC1 had made it. When NTL send the reply back, they send it to PC1, PC1 will resend it to PC2. A router operates in much the same way as ICS. This process is called "Network Address Translation" (NAT).

The point is that if you play a game purely on those PCs (without attaching to an external game), then each PC will have it's own IP. If you play the game on those PCs using an external server, then due to NAT, both PCs will be using the same IP, thus confusing the server.

Thanks for the post. If I was to buy another IP address off NTL .. would this be setup in my router to goto a certain computer?

[Stuart]

Originally Posted by Bytecon

Thanks for the post. If I was to buy another IP address off NTL .. would this be setup in my router to goto a certain computer?

You wouldn't use a router as such for that. You would use a "hub". A hub allows you to connect multiple computers to one connection, but where as a home router will assign each PC it's own IP. A hub will not, so NTL would need to assign an IP to each PC.

When you get a second IP, NTL apparently give you a two port hub.

[Bytecon]

I see, so how would this setup work with one wired PC + other wireless PC's?