Network configuration

The network is configured when the server is provisioned and works out of the box. You edit it by hand to add an IPv4 address or set up IPv6.

A mistake in the network config cuts off SSH. Change one parameter at a time and check login from a second window without closing the current one. If access is lost, log in through Console on the server card, not every server has it. The last resort is Reinstall, but it wipes all data.

Additional IPv4

There is no button in the bot, the address is issued by support @lumisup_robot. Once you get the address, netmask, and gateway, set them in the OS.

Ubuntu (Netplan)
Debian (interfaces)
Windows

Config – a file in /etc/netplan/, such as 01-netcfg.yaml or 50-cloud-init.yaml. ip a shows the interface name, often eth0 or ens3.

Address – add the second one to the addresses list. Here 192.0.2.10 is the primary IP and 192.0.2.11 the added one, substitute your own:

/etc/netplan/01-netcfg.yaml

network:
  version: 2
  ethernets:
    eth0:
      addresses:
        - 192.0.2.10/24
        - 192.0.2.11/24
      routes:
        - to: default
          via: 192.0.2.1
      nameservers:
        addresses:
          - 1.1.1.1
          - 8.8.8.8

Apply – netplan try applies the config and rolls it back after 120 seconds unless you confirm. That way a typo will not cut off access:
netplan try netplan apply

On Debian 12 the eth0:0 alias in /etc/network/interfaces may not work: it depends on what manages the network (ifupdown, systemd-networkd, or NetworkManager). So first add the address temporarily, until reboot:

sudo ip addr add 192.0.2.11/24 dev eth0

Check that the address shows up in ip a and the server is reachable from outside. How to make it permanent depends on the network stack: if unsure, ask @lumisup_robot, support will help with the setup.

Adapter – Win + R → ncpa.cpl → right-click the network adapter → Properties.
IPv4 – Internet Protocol Version 4 (TCP/IPv4) → Properties → Advanced.
Address – in the IP addresses section click Add, enter the address and subnet mask you were given, save.

IPv6

If you have been given an IPv6 address and gateway, set them up the same way. Add the lines to the current config, do not remove the IPv4 addresses.

Ubuntu (Netplan)
Debian (interfaces)

/etc/netplan/01-netcfg.yaml

network:
  version: 2
  ethernets:
    eth0:
      addresses:
        - "2001:db8:abcd::2/64"
      routes:
        - to: "::/0"
          via: "2001:db8:abcd::1"

to: "::/0" is the default route for IPv6, like default for IPv4. Apply: netplan apply.

/etc/network/interfaces

iface eth0 inet6 static
    address 2001:db8:abcd::2
    netmask 64
    gateway 2001:db8:abcd::1

Apply: systemctl restart networking.

Check the address and connectivity:

ip -6 a
ping6 -c 4 google.com

Check

ip a
ip route
ping -c 4 1.1.1.1

ip a – addresses and interfaces.
ip route – the routing table.
ping -c 4 1.1.1.1 – whether the server reaches the outside.

The connection keeps dropping – look at the route with MTR, it combines ping and traceroute:

apt install mtr-tiny
mtr 1.1.1.1

Next: Firewall, Reverse DNS, VPS not working.

Basics

Setup

Protection & issues

Software & services

Network configuration

Additional IPv4

IPv6

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​Additional IPv4

​IPv6

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Additional IPv4

IPv6

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