How to add a route through a specific interface on FreeBSD (10 to 13)

• Author: Solène
• Date: 02 May 2016
• Tags: freebsd networking

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.