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Is it possible to route different applications through different network interfaces?

Let's say (hypothetically) I want to route /usr/bin/thunderbird through vlan0 but /usr/bin/firefox through eth0.

Is there a way? And if so, is there a graphical tool for it as well?

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migrated from stackoverflow.com Jan 13 '11 at 16:58

This question came from our site for professional and enthusiast programmers.

up vote 1 down vote accepted

An easier solution is a custom routing to specific hosts, in your example, to your mail server.

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Routing is done at IP level, which doesn't know anything about applications that are generating traffic. So I don't think it's possible.

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How is it possible then that with netstat -p you can see the program behind a specific network connection? – mydoghasworms Jun 7 '11 at 18:34

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