How to add a static route to wireguard interface

jrennefe · 2021-04-26T15:34:46.987Z

I would like to add a static route to a wireguard interface.
I tried to do it via Luci, but the first problem is that the wg0 interface does not show up as an interface in Luci.
In another thread I have read that it needs to be added manually. So I created an interface manually.

grafik1988×658 95 KB

But when I then create a static route with that interface, the route does not show up in the routing table.

grafik2004×832 83.8 KB

Riho-shuu · 2021-04-27T06:44:48.590Z

Hi,

If the wireguard client is connected, you can use the following command to add the route:

ip route add 192.168.11.0/24 dev wg0

grepme · 2021-05-22T08:08:21.441Z

If you are able to access the router over SSH, you can set a PostUp command in the interface config file (usually /etc/wireguard/wg0.conf

You can edit the file using nano: nano /etc/wireguard/wg0.conf

you should see something like this:

[Interface]
Address = 192.168.11.0/24
Address = xxxx::1/xx
PrivateKey = lonGsTringOfRandomcHars

[Peer]
…other stuff

You want to add two lines at the bottom of the [Interface] section, like so:

[Interface]
Address = 192.168.11.0/24
Address = xxxx::1/xx
PrivateKey = lonGsTringOfRandomcHars
PostUp = ip route add 192.168.11.0/24 dev wg0
PostDown = ip route del 192.168.11.0/24 dev wg0

[Peer]
…other stuff

Save the file by pressing ctrl^s, then exit using ctrl^x. From now on, wg will automatically add your static route when the interface is activated, and automatically remove it when the interface is disabled

cheers bru