Connect to the server via SSH and edit file /etc/netplan/01-netcfg.yaml:
nano /etc/netplan/01-netcfg.yaml
The current settings are as follows:
network:
version: 2
renderer: networkd
ethernets:
ens3: addresses: [ 94.103.83.39/24 ]
gateway4: 94.103.83.1
nameservers:
addresses: — «8.8.8.8»
And then add the following:
network:
version: 2
renderer: networkd
ethernets:
ens3: addresses: [ 94.103.83.39/24, 95.142.45.241/24 ]
gateway4: 94.103.83.1
nameservers:
addresses: — «8.8.8.8»
routes:
— to: 0.0.0.0/0
via: 94.103.83.1
metric: 100
— to: 0.0.0.0/0
via: 95.142.45.1
metric: 100
where 95.142.45.241 is an additional dedicated IP, and 95.142.45.1 is a gateway.
Check:
netplan try
If there are no errors, then apply the settings.