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IP addresses of the dedicated server

IP addresses of the dedicated server

Dedicated servers are connected to the Servercore network infrastructure by default.

After ordering, each server is allocated a public shared IPv4 address.To view the public IP address and other network settings, go to the control panel: in the top menu, click Products → Dedicated Servers → Servers → Server page → Network tab. When installing the OS automatically, the network interface on the server is configured automatically.When installing the OS from an image, you need to configure the network interface manually.If you need a public dedicated IP address, connect additional public IP addresses.

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

Public shared IP addresses⁠

Public shared IP addresses are on a common subnet and have a fixed prefix /24 (mask 255.255.255.255.0). Servers of other clients 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 in 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 public IP addresses.

Public dedicated IP addresses⁠

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

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

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

Private IP addresses⁠

Private IP addresses are generated from standardized 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 ranges of private IP addresses⁠

  • 10.0.0.0 — 10.255.255.255 (subnet mask: 255.0.0.0 or /8);
  • 100.64.0.0 — 100.127.255.255 (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 (subnet mask: 255.240.0.0 or /12);
  • 192.168.0.0 — 192.168.255.255 (subnet mask: 255.255.0.0 or /16).

Add a private subnet in the control panel⁠

When you configure the private network interface on a server, the assigned subnet is not added to the control panel.You can add the subnet to the control panel manually to keep track of IP addresses from the private subnet and monitor the busy ones.

If you add or change a private subnet in the control panel, it will not affect the network interface settings, you have to change them on the server yourself.

You can add private IP addresses in the Control Panel only for servers in a ready configuration with the available 1 Gbps Private Network option.

  1. In the Control Panel, on the top menu, click Products and select Dedicated Servers.
  2. Go to Network → Private Subnets tab.
  3. Click Add Private Subnet.
  4. Select a region.
  5. Select a pool.
  6. Select VLAN.
  7. In the CIDR field, enter a subnet from the private subnet range.
  8. Click Create.

Connect additional public IP addresses⁠

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

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

1. Order a dedicated subnet⁠

  1. In the Control Panel, on the top menu, click Products and select Dedicated Servers.
  2. Go to the Network section.
  3. Click Order Subnet.
  4. Select the desired service.
  5. Specify a pool. You cannot move a subnet to another pool.
  6. Specify the purpose of the use.
  7. Select a payment period.
  8. Click Pay. When the service is ready for use, a notification will be sent in the ticket.

2. Add an IP address to the accounting system⁠

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

  1. In the Control Panel, on the top menu, click Products and select Dedicated Servers.
  2. In the Servers section, 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.

3. Change the network settings on the server⁠

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

  • IP address;
  • subnet mask;
  • gateway.

You can view the parameter values in the control panel: from the top menu, click Products → Dedicated Servers → Network → Subnet tab → Dedicated Subnet card.

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

4. Switch the VLAN on the server port⁠

  1. In the Control Panel, on the top menu, click Products and select Dedicated Servers.
  2. In the Servers section, open the Server page → Ports tab.
  3. In the Internet field, change the value of Shared to the value of the dedicated VLAN.
  4. Save the changes you have made. Access to the server will be restored with the new IPv4.

Return to a shared public IP address⁠

  1. In the Control Panel, on the top menu, click Products and select Dedicated Servers.
  2. In the Servers section, open the Server page → Ports tab.
  3. In the Internet field, change the value of the allocated VLAN to Shared.
  4. Save the changes you have made.
  5. In the server OS, change the values of the public network interface settings. For more information, see the Configure the network interface on the server instruction. You can view the parameter values for working with a public IP address from a shared subnet ( /32) in the control panel: from the top menu, click Products → Dedicated Servers → Network → Subnet tab → Dedicated Subnet card.