TL> Yes, I would say that your LAN segment is both a LAN and part of a WAN TL> at the same time. A LAN, because it is a local network, contained TL> within one site, but the fact it uses global addresses makes it part TL> of a global WAN.
That was my line of reasoning too...
TL> However,
Ah, here it comes.... ;-)
TL> access from outside the LAN segment depends on firewall settings. TL> Here, some devices are completely exposed, some have traffic allowed TL> only on specific ports and the rest are not reachable from the TL> outside, due to the firewall settings.
I knew someone was going to mention firewalls. ;-)
More or less the same here. With the difference thatnon of the devices is fully exposed. So one could argue that the firewall is the boundery between te WAN and the LAN.
Eh... but wait. Which firewall? My router does packet filtering, but so does my ISP. Port 25 is filtered here. ( I don't like that, but the fact is that it is..) So... the ISP has some kind of firewall too. So where does the WAN begin? Behind my own firewall, or that of my ISP?
