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I have a WIFI and a LAN both connected to internet (with 2 different provider).

How can I set my browser to use 1 instead of the other to browser?

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Under which OS? – Alan Whitelaw Jan 31 '11 at 17:43
I've never used multiple connections myself before, but under Windows would setting the priority of a connection higher/lower (under Nextwork Connections) affect this at all? – Xantec Jan 31 '11 at 17:56
up vote 0 down vote accepted

This is not normally done on a per-browser basis, but rather is done system-wide using routing metrics:

The route with the lower metric for a given connection will be chosen. Windows by default will set a LAN connection to have a lower metric than a wireless connection, but there are things that can cause this to change over time. You can set the metric for a given route using the command line program aptly named route.

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