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WatchGuard XTM 330. How to force a PC to use a given external interface

Hi all,

I have several static IP's from my ISP all on the same router. Up to now I use to have two firewalls connected to the router, each one with a different public IP address.

I have set up two external interfaces in XTM 330 (not multi-wan, just two interfaces with the same gateway).

I checked that if I physically unplug the interface 1 (with public IP x.x.x.1), all PCs and servers keep connected to the internet through the interface 2 (ip x.x.x.2) and vice-versa.

In fact, my intention setting up two interfaces was to force the mail server to use interface 2, so its public ip is always (x.x.x.2). How can I do this?

Thank you.
1 Solution
Configure policy based routing:

Please implement and update.

Thank you.

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