With virtualization, the additional IP addresses are used via the guest system. When using netplan, simply add the additional IP addresses as /32 to the addresses section Additional IP addresses (virtualization) And if you change the data, you need to adjust all the entries. If you are using many IPs, the configuration file becomes confusing and prone to errors. The disadvantage is that you need to list both the interface name and address twice. When networking is configured via /etc/network/interfaces this is easily done by adding the option pointopoint in the configuration stanza.įor up and down, expect just one line of shell code and this can be repeated for several addresses. In order to reach other servers as well as the Internet an explicit host route for the gateway in addition to the default route is needed. This way the server assumes it is alone and will not send any packets directly. The primary IP is configured with the netmask set to 255.255.255.255 (/32). This is done via a point to point configuration between the primary IP and the gateway. Our standard images already come with this configuration so that all traffic is routed via the gateway. In order to reach a server in the same subnet, the network configuration must be set up as a point to point configuration. In order to prevent the accidental use of a foreign IP address, our infrastructure rejects any Ethernet packets that are not addressed to the gateway address. The main IP of a dedicated root server is usually located in a /26 or /27 subnet. Network configuration Debian / Ubuntu Last change on
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