Windows XP/2000 able to find a gateway automatically. Why?

C

clx

A few routers on my LAN are connected to the Internet. I
configured the gateway of Windows XP to an arbitrary IP address on a
different subnet than my LAN, I could still access Internet. Windows XP
is able to find a router to use as its gateway to the Internet.

Windows 2000 behaved similarly.

Does anyone know the reason?
 
A

Anteaus

Might be that the router is set to respond to UPnP requests. I tend to turn
this option OFF, as it opens the way for all sorts of skulduggery like
music-piracy servers being established without the admin's knowledge.
 

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