This is a quick reference guide on how to add a persistent static route on on Ubuntu 18.04
1. Edit yaml file in /etc/netplan
At this point you should already have a netplan yaml file created either for dhcp or a statically assigned interface IP address.
root@VPS2:~# cd /etc/netplan/ root@VPS2:/etc/netplan# ls network_config.yaml root@VPS2:/etc/netplan# nano network_config.yaml
2. Define routes in yaml file.
IMPORTANT: It is extremely important to place all the configuration in the correct columns otherwise the configuration will not take. You should be able to copy, edit and paste the configuration example below and this will place the configuration correctly into your file.
The example below shows me pointing all traffic destined for 10.1.1.0/24 to go via 192.168.1.2.
network: version: 2 renderer: networkd ethernets: eth0: addresses: - 192.168.1.100/24 gateway4: 192.168.1.1 nameservers: addresses: - 18.104.22.168 search: - mydomain.net routes: - to: 10.1.1.0/24 via: 192.168.1.2
3. Apply Netplan
root@VPS2:/etc/netplan# netplan apply
3. Check that the route is in the routing table using “route -n”
root@VPS2:/etc/netplan# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
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