Windows intelligence with multiple internet links.

[interix]

what would happen if i have two links to the internet on the same
machine, but only one of them set as the default GW. - what happen if
an incoming TCP connection comes from the interface that has NOT a
gateway ? would windows be intelligent enough to send the
responses(i.e: TCP Handshake) to the same interface packets came from,
or it will send to the default GW (resulting in no connection, as the
remote site didint start a connection to that ip) ?

Thank you in advance.

 

[johnsuth]

what would happen if i have two links to the internet on the same
machine, but only one of them set as the default GW. - what happen if
an incoming TCP connection comes from the interface that has NOT a
gateway ? would windows be intelligent enough to send the
responses(i.e: TCP Handshake) to the same interface packets came from,
or it will send to the default GW (resulting in no connection, as the
remote site didint start a connection to that ip) ?

Thank you in advance.

If you don't define a route for your second interface then all responses
will go to the default route.

I am not sure whether defining an interface automatically defines a
route for that interface.

Maybe the default route would get the response back to where the request
came from anyway.

 

[Kurt]

What kind of incoming TCP connection? The default route is for unknowns. If
you know the origin of the connection (like this is an incoming VPN from
home to work), you can add a route to the known IP address via the correct
interface. Otherwise, it'll be directed out the default gateway. Windows
allows you to have multiple default gateways, but it's fairly flakey in my
experience. Why do you need two connections to the Internet?

....kurt