On Sat, 9 Sep 2006, Gary VanderMolen wrote:
I wonder how these utilities work?
If they query the router, the router would have to support
that type of query. I doubt it would work on *my* system
since I'm doing double NAT. My router doesn't know the
WAN IP because its WAN port gets a private address
(192.168.1.64) from the DSL modem.
Generally these utilities do not query the router. And you are
right, the one's that do query the router (using upnp) would
know the router's wan ip address, but would not know the
*public* ip address, if double (or more) nating is involved.
Also, a router's wan ip address used to connect to the ISP may
not be a *public* ip address either, if the ISP itself is using
nat. So a router's wan ip address does NOT necessarily equal
*public* ip address.
If the utility queries an outside server, it's no different
than browsing to http://whatismyip.com.
That is basically what most of these utilities do. They just
install a convenient systray icon to provide the information
that browsing to http://whatismyip.com (or similar) would show.
--
----------------------------------------
WIN-HOME Archives: http://PEACH.EASE.LSOFT.COM/archives/WIN-HOME.html
Contact the List Owner about anything: [EMAIL PROTECTED]
Official Win-Home List Members Profiles Page
http://www.besteffort.com/winhome/Profiles.html
