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IP addresses of the dedicated server
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IP addresses of the dedicated server

Dedicated servers connect to Selectel network infrastructure by default.

Once ordered, each server is allocated a public shared IPv4 address. You can view the public IP address and other network settings in control panel on the server page → Network tab. When automatic OS installation, the network interface on the server is configured automatically. When installing the OS from the image, you must configure the network interface manually. If you need a public-dedicated IP address — connect additional IP addresses.

Private IP address can be generated from standard ranges. It is always manually writed on the server.

Public shared IP addresses⁠

Public shared IP addresses are on a common subnet and have a fixed prefix of /24 (mask 255.255.255.255.0). Other clients' servers are also on the shared subnet, and servers in the same account can fall into different shared subnets. For security, IP address spoofing protection is used on the shared subnet.

A public shared IP address won't allow it:

  • connect DDoS protection;
  • configure static or dynamic routing;
  • unblock blocked ports;
  • configure BGP and BGP + anycast subnet connection;
  • use a public dedicated IP address at the same time;
  • reassign the address to another server (including using VRRP/CARP/Keepalived/Corosync, etc.). For server redundancy).

To change the IP address on the server, connect additional IP addresses.

Public dedicated IP addresses⁠

Public dedicated IP addresses are on a dedicated subnet and have any prefix (mask). No more than one dedicated VLAN per account is allocated in the same pool.

The IP addresses of a dedicated subnet can be used on account servers that are in the same pool.

To obtain a public dedicated IP address, connect additional IP addresses.

Private IP addresses⁠

Private IP addresses are generated from standard ranges.

Servers at such addresses are not directly accessible from the Internet.

If traffic is exchanged within one private subnet, traffic within it is not counted.

Standard private IP address ranges⁠

  • 10.0.0.0.0 — 10.255.255.255.255 (subnet mask: 255.0.0.0.0 or /8);
  • 100.64.0.0.0 — 100.127.255.255.255 (subnet mask 255.192.0.0 or /10) — this subnet is recommended by RFC 6598 for use as addresses for CGN (Carrier-Grade NAT);
  • 172.16.0.0 — 172.31.255.255.255 (subnet mask: 255.240.0.0 or /12);
  • 192.168.0.0 — 192.168.255.255.255 (subnet mask: 255.255.0.0 or /16).

Connect additional IP addresses⁠

After ordering a dedicated subnet, you cannot use the public shared IPv4 address that was allocated automatically when you ordered the server.

  1. Order a dedicated subnet.
  2. Add IP address to the accounting system.
  3. Change network settings on server.
  4. Switch VLAN on server port.

Order a dedicated subnet⁠

  1. In Control Panel, go to Servers and Hardware → Network.
  2. Click Order Subnet.
  3. Select the desired service.
  4. Specify the pool. You cannot move a subnet to another pool.
  5. Specify the purpose of the use.
  6. Select a payment period.
  7. Click Pay. When the service is ready to go live, a notification will come in a ticket.

Add an IP address to the accounting system⁠

In the accounting system, you can record which IP address is configured on your server. This will not change the network settings on the server, they must be changed manually.

  1. In Control Panel, go to Servers and Hardware → Servers.
  2. Open the server page → Network tab.
  3. Click the Add IP Address button.
  4. Specify the subnet.
  5. Select one or more IP addresses.
  6. Save the changes you have made.

Change network settings on the server⁠

When connecting an additional IP address in the server OS change network settings:

  • IP address;
  • subnet mask;
  • gateway.

You can view the parameter values in Control Panel under Network on the Subnet tab in the card of the selected subnet.

Apply the network settings. Availability on the server will be lost unless the VLAN on the port is changed.

Switch the VLAN on the server port⁠

  1. In Control Panel, go to Servers and Hardware → Servers.
  2. Open the server page → Ports tab.
  3. Change the Internet field from Internet to the value of the allocated VLAN.
  4. Save the changes you have made. Access to the server will be restored with the new IPv4.

Return to the shared public IP address⁠

  1. In Control Panel, go to Servers and Hardware → Servers.
  2. Open the server page → Ports tab.
  3. Change the value of the allocated VLAN in the Internet field to General.
  4. Save the changes you have made.