Quote Originally Posted by tdjokic
I have ADSL Ethernet modem DSL-300T, ...
By the way, the review linked to says "....so there will be some guides for it that show it being used as a simple one port NAT router. The firmware that is used in the UK market is purely for an Ethernet modem, and that is how we will review it." What they are saying is that in some markets Dlink does include NAT router software inside this modem. Apparently in the UK market they do not. This is probably a good thing actually, as long as you use it with another router. With full NAT router firmware included it could limit your ability to use it with another router (unless this part could be disabled). Actually, I'm very troubled by one part of the review. In the section on connecting the modem to a router the author says: "Initially when you first connect the modem to the router, it will hand the router an IP address in the range 192.168.1.x." This implies that the UK version is doing some limited NAT, otherwise it would give the router a real routabe IP address rather than a local NAT IP address. However it must be passing all traffic to the NAT address, do there is no protection from this (like putting a PC on a router in the "DMZ"). But the other features of a NAT router are missing from the setup. The end result is that with this modem you'll have 2 levels of NAT when you use a router, and you may see a small increase in ping times as a result of that.