two networks in one server?

[pepe]

Hello!

I'm just asking before trying if it possible to use two network uplinks in
one server so other would be just backup way in?
I have currently connection from two ISPs and server is up with one
connection. Is it possible to add another nic and wire that to connection
from another isp? So isp 1 would be in normal use in/out, but isp 2 could be
used connecting in?

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pepe