Configure the network interface on the server

Last update: December 27 2024

Configure the network interface on the server

To connect the server to private and public network configure the network interfaces on the server.

The network interface for the public network is configured automatically only when the automatic OS installation. The interface for the private network must always be configured manually.

You can view the parameters for customization in control panel under Servers and hardware → Servers → server page → tab Network.

Configure the network interface of the public network⁠

Ubuntu

1. Connect to the server via SSH or through KVM console.

2. Open the utility configuration file netplan word processor vi:

   vi /etc/netplan/01-netcfg.yaml

3. Add or change the values of the public network interface settings. The type of configuration file depends on the Ubuntu version:

   Ubuntu 20.04 LTS

   network:
     ethernets:
       <eth_name>:
         addresses:
           - <ip_address>/<mask>
         gateway4: <gateway>
         nameservers:
           addresses: [<dns_servers>]
       renderer: networkd
       version: 2

   Specify:

   • <eth_name> — name of the network interface of the public network;
   • <ip_address>/<mask> — the public IP address of the server with a subnet mask, e.g. 188.93.23.36/29;
   • <dns_servers> — DNS servers. We recommend using Selectel recursive DNS servers But you can specify any available DNS servers;
   • <gateway> — gateway.

   Ubuntu 22.04 LTS, 24.04 LTS

   network:
     version: 2
     renderer: networkd
     ethernets:
       <eth_name>:
         addresses:
           - <ip_address>/<mask>
         nameservers:
           addresses: [<dns_servers>]
         routes:
           - to: default
             via: <gateway>
           - to: <destination_subnet>
             via: <next_hop_ip_address>

   Specify:

   • <eth_name> — name of the network interface of the public network;
   • <ip_address>/<mask> — the public IP address of the server with a subnet mask, e.g. 188.93.23.36/29;
   • <dns_servers> — DNS servers. We recommend using Selectel recursive DNS servers But you can specify any available DNS servers;
   • <gateway> — gateway;
   • <destination_subnet> — for static routes: the CIDR of the destination subnet to which the traffic will be routed;
   • <next_hop_ip_address> — for static routes: next-hop — the IP address through which devices on the source subnet will route traffic to the destination subnet. You can enter any address from the source subnet.

4. Click ESC.

5. Exit the text editor vi with the changes intact:

   :wq

6. Apply the configuration:

   netplan apply

7. Optional: reboot the server.

Debian

1. Connect to the server via SSH or through KVM console.

2. Open the network interfaces configuration file with a text editor vi:

   vi /etc/network/interfaces

3. Add or change the values of the public network interface settings:

   auto <eth_name>
   iface <eth_name> inet static
   address <ip_address>
   netmask <mask>
   gateway <gateway>
   dns-nameserver <dns_servers>

   Specify:

   • <eth_name> — name of the network interface of the public network;
   • <ip_address> — the public IP address of the server, e.g. 188.93.23.36;
   • <gateway> — gateway;
   • <mask> — subnet mask;
   • <dns_servers> — DNS servers. We recommend using Selectel recursive DNS servers But you can specify any available DNS servers.

4. Click ESC.

5. Exit the text editor vi with the changes intact:

   :wq

6. Restart the network:

   service networking restart

7. Optional: reboot the server.

CentOS

1. Connect to the server via SSH or through KVM console.

2. Output information about the network interfaces:

   ip address

3. Create or open the public network interface configuration file with a text editor vi:

   vi /etc/sysconfig/network-scripts/ifcfg-<eth_name>

   Specify <eth_name> — network interface name.

4. Add or change the values of the network interface settings:

   NAME="<eth_name>"
   ONBOOT=yes
   NETBOOT=yes
   BOOTPROTO=static
   HWADDR="<mac_address>"
   IPADDR="<ip_address>"
   NETMASK="<mask>"
   GATEWAY="<gateway>"
   TYPE=Ethernet

   Specify:

   • <eth_name> — name of the network interface of the public network;
   • <mac_address> — MAC address of the network device;
   • <ip_address> — IP address, e.g. 188.93.23.36;
   • <mask> — subnet mask;
   • <gateway> — gateway.

5. Click ESC.

6. Exit the text editor vi with the changes intact:

   :wq

7. Restart the network:

   systemctl restart network

8. Optional: reboot the server.

Example of changing network settings in CentOS in the blog article Network configuration in CentOS 7.

Windows

1. Connect to the server via RDP or through KVM console.

2. Open it up Network and Sharing Center.

3. Open the network interface of the public network.

4. Click Properties.

5. From the list, select IPv4.

6. Click Properties.

7. Specify the network interface parameters:

   • IP-address — the public IP address of the server, e.g. 188.93.23.36;
   • Subnet mask — subnet mask.

8. Click OK.

Configure the network interface of the private network⁠

Ubuntu

1. Connect to the server via SSH or through KVM console.

2. Open the utility configuration file netplan word processor vi:

   vi /etc/netplan/01-netcfg.yaml

3. Add or change values for the network interface settings of the private network:

       <eth_name>:
               addresses: [<ip_address>]

   Specify:

   • <eth_name> — name of the network interface of the private network;
   • <ip_address> — the private IP address of the server, e.g. 192.168.0.2/24.

4. Click ESC.

5. Exit the text editor vi with the changes intact:

   :wq

6. Apply the configuration:

   netplan apply

7. Optional: reboot the server.

Debian

1. Connect to the server via SSH or through KVM console.

2. Open the network interfaces configuration file with a text editor vi:

   vi /etc/network/interfaces

3. Add or change values for the network interface settings of the private network:

   auto <eth_name>
   iface <eth_name> inet static
   address <ip_address>

   Specify:

   • <eth_name> — name of the network interface of the private network;
   • <ip_address> — the private IP address of the server, e.g. 192.168.0.2/24;

4. Click ESC.

5. Exit the text editor vi with the changes intact:

   :wq

6. Restart the network:

   service networking restart

7. Optional: reboot the server.

CentOS

1. Connect to the server via SSH or through KVM console.

2. Output information about the network interfaces:

   ip address

3. Create or open the configuration file of the private network interface with a text editor vi:

   vi /etc/sysconfig/network-scripts/ifcfg-<eth_name>

   Specify <eth_name> — name of the network interface of the private network.

4. Add or change the values of the network interface settings:

   NAME="<eth_name>"
   ONBOOT=yes
   BOOTPROTO=none
   IPADDR="<ip_address>"

   Specify:

   • <eth_name> — name of the network interface of the private network;
   • <ip_address> — the private IP address of the server, e.g. 192.168.0.2/24;

5. Click ESC.

6. Exit the text editor vi with the changes intact:

   :wq

7. Restart the network:

   systemctl restart network

8. Optional: reboot the server.

Example of changing network settings in CentOS in the blog article Network configuration in CentOS 7.

Windows

1. Connect to the server via RDP or through KVM console.

2. Open it up Network and Sharing Center.

3. Open the network interface of the private network.

4. Click Properties.

5. From the list, select IPv4.

6. Click Properties.

7. Specify the network interface parameters:

   • IP-address — the private IP address of the server, e.g. 192.168.0.2;
   • Subnet mask — subnet mask.

8. Click OK.