Myron Szymanskyj wrote: [...] > Think simple with this one. In this instance, the IP and subnet settings > are ignored. If it's an IP protocol transmission, look at the MAC address > and not the IP address, or, look at both. It's one dirty way of validating > that the IP address assigned to a computer is as it should be.
There's no way of retrieving a MAC address from a computer not on the local network looking into packets of standard IP services (i.e. http, ftp, etc.). As Tom said, MAC addresses provide layer 1-2 information only and thus don't pass through routers. The unique MAC address of the all IP packets you will be receiving on the EXT interface of your gnatbox is likely to be your ISP router's. -- M.
