Somebody came in with a laptop that had a shared network connection
and for some reason some local stations picked up on it for their
internet rather than the regular route. I have a bunch of stations in
an office and a server. The router gives dhcp and points back to the
server for dns. Stations are set to get addresses dynamically (though
the router associates addresses with mac addresses so they're always
the same). A laptop that was brought in had a wireless connection that
had been shared. It ended up picking up the wireless guest internet
connection but was also plugged in and connected to the in-house net.
When a workstation was fired up it got its address and gateway from
the router and could talk to stations in house but for some reason
picked up this laptop's share as its internet connection. Why would it
do that? So in network connections it showed the ethernet port
connected and the interenet connection as being through this laptop's
share. IPconfig showed the right IP and gateway but its dns was the
address of the laptop. I'm not sure I understand why the laptop had a
shared connection in the first place. I mean you have to connect to
the laptop through the network to see it has a shared connection, so
what's the purpose of such a share? Probably just a mistake. I turned
it off. But the real question is why would an in-house workstation
pick it up instead of the normal route? This means anyone who brings
in a laptop and we connect them to the in-house ethernet so they can
do some work could really confuse things.

Thanks