NILIf one day under FreeBSD (from 10 to 13 at least) you have a system
with multiple IP addresses on the same network and you need to use
a specific IP for a route, you have to use the -ifa parameter in
the route command.
In our example, we have to use the address **192.168.1.140** to access
the network **192.168.30.0** through the router **192.168.1.1**, this
is as easy as the following.
route add -net 192.168.30.0 192.168.1.1 -ifa 192.168.1.140
You can add this specific route like any other route in your rc.conf
as usual, just add the -ifa X.X.X.X parameter.