Can someone tell me the procedure for designing an IP addressing scheme using NAT? My WAN set up is: 6 hosts > switch > router > internet > router > switch > 10 more hosts

What exactly is it you are trying to do? Do you want the two separate sites to be on separate subnets or on the same subnet? Are all clients going to be accessing the internet (for surfing purposes, not for accessing each other remotely) through a single point or will each site be surfing from their own location? Are the two locations going to be in the same domain? Do they need to communicate with each other (ie: access resources in the other location)? You don't actually use NAT to design an IP addressing scheme. You use NAT to allow multiple IP addresses to access the internet through a single address. You design your network then use NAT to allow the clients at each location to connect to the internet through a single internet connection (ie: IP address). NAT is pretty basic networking technology. There's a ton of information available on the web regarding how it works and how to use it. A quick google search will yield many hits on the topic. I highly recommend you do a bit of reading/research on the top before continuing. It's to your benefit to do so.

Basically, I want the seperate sites on seperate subnets. The clients are going to have net access from their own location. As far as communicating with each other goes, a file server will be implememted; to which they will all need access. Is that any clearer?

Much, thank you. As I pointed out, NAT is what it is and you don't really need to think about it in regard to the actual design of the network. You will need to utilize it at both sites to allow all clients at each site to access the internet through their internet connection. Depending on your budget, you could use something as cheap and easy as ICS. You could also spend around $50.00 and buy a "highspeed internet router" to do the job for you. I would go with the router myself. There are more expensive solutions but a highspeed internet router should work and they come with NAT, DHCP and a firewall built in and do some basic routing so those should suffice for your needs. Make sure you buy routers that are VPN capable as you'll need that in order to have a secure connection between sites. If you're going to be going back and forth between sites a lot, I would establish a VPN tunnel between the sites. As to the design, it's going to be pretty basic since you only have the two sites. You will need to do some routing between sites (ie: between subnets). You could do the routing with the highspeed internet routers or with your server's. You'll have to decide which you prefer and look at which will do the job better. To be honest, since you need to communicate between sites regularly, I would use a single subnet. It will simplify everything and the only thing you're left dealing with is the VPN. If you're determined to have two separate subnets I would do it as follows: Site A: IP Range: 192.168.1.0 to 1.200 Subnet Mask: 255.255.255.0 Site B: IP Range: 192.168.2.0 to 2.200 Subnet Mask: 255.255.255.0

I might be able to help you with NAT, if I knew what router (type and all that stuff) you have and if it has CLI (command line interface) or GUI (Grafical user interface). Gender doesn't matter in the Computing world. Commom sence does. Don't forget that.