[Swan] Making Libreswan host connections go through the tunnel

[Bruno de Paula Larini]

Hi list!

What would be the correct way to make Libreswan host connections go 
through the tunnel (considering it isn't its own default gateway, of 
course)?
I'm using Libreswan 3.25.

So far I was using this: ip route add <remote_network> via 
<own_lan_gateway_ip> dev eth0
Also added it in /etc/sysconfig/network-scripts/route-eth0 (it's a 
Fedora 27, kernel 4.17 by the way).

However I noticed that everytime I stop the Libreswan daemon, the static 
routes that match the rightsubnets are flushed too.
This doesn't happen on my CentOS 7.4 gateway (kernel 4.1), with 
Libreswan 3.20.
Right after a reboot, they also aren't present either.
I always use 'systemctl' to do so. Running only 
'/usr/libexec/ipsec/whack --shutdown' also removes them.

Would this be a new expected behaviour? If yes, what would be an 
alternative so the localhost connections can also go through the tunnel?

Thanks!