Proxmox 6.0 Hetzner networking

To revert back from systemd-networkd to old school /etc/network/interfaces in the current Hetzner Proxmox image you can:

(Do I have to say you have to check / add your own values?)

  1. Edit interfaces config:

     /etc/network/interfaces.d/*

 auto lo 
 iface lo inet loopback 
 iface lo inet6 loopback
    
 auto enp4s0 
 iface enp4s0 inet static   
 address 123.123.123.123   
 netmask 255.255.255.255   
 pointopoint 123.123.123.456   
 gateway 123.123.123.456
    
 iface enp4s0 inet6 static   
 address abcd:efg:123:456::2   
 netmask 64   
 gateway fe80::1

  2. Enable the config:

     ifdown --force enp4s0 lo && ifup -a 
 systemctl unmask networking 
 systemctl enable networking 
 systemctl restart networking

  3. Remove unwanted services:

     systemctl stop systemd-networkd.socket systemd-networkd networkd-dispatcher systemd-networkd-wait-online

 systemctl disable systemd-networkd.socket systemd-networkd networkd-dispatcher systemd-networkd-wait-online

 systemctl mask systemd-networkd.socket systemd-networkd networkd-dispatcher systemd-networkd-wait-online

You’re good to go.