Whats a NAT firewall?
Network Address Translation is a technique of routing internet data to their correct recipients inside the firewall. In the process, it blocks network traffic that wasn’t requested. Part of the workings of NAT is using private network addresses for the machines inside. Where all internet addresses are of the form of four groups of numbers separated by three periods, typically the private addresses are in the series 192.168.0.nn and are not used on the internet as such. From the outside, all of your machines on the inside appear as one, and have the address of the NAT box itself. NAT is more like a proxy server than a firewall. But because it effectively protects the machines on the inside by disguising them and itself taking the hits from the outside, it can be considered a firewall to that extent. The DI-704 also has fairly comprehensive port filtering together with NAT, making for a pretty good firewall. Adding four switched ports makes it a slam-dunk deal. Setup for these little box
