By default, each Data Mammoth server comes with one public IPv4 address. However, there are scenarios where you may need additional IP addresses — such as hosting multiple SSL-secured websites, running isolated services, or meeting compliance requirements. This guide explains how to request, configure, and manage additional IP addresses.

When You Need Additional IPs

Common reasons for adding extra IP addresses include:

• Multiple websites with dedicated IPs — Some applications or configurations require each website to have its own IP address.
• SSL certificates — While modern servers support SNI (Server Name Indication) for hosting multiple SSL sites on one IP, some legacy clients may require dedicated IPs.
• Service isolation — Run different services (web, mail, database) on separate IP addresses for better organization and security.
• Email reputation — Use a dedicated IP for outgoing email to maintain a clean sending reputation.
• Failover and redundancy — Configure multiple IPs for high-availability setups.

Ordering Additional IP Addresses

Additional IPs are billed as a monthly add-on to your server subscription. The new IP address is typically assigned within a few minutes.

IP Address Limits

There may be a limit on how many additional IPs you can add per server. If you need more IPs than the maximum allowed, contact our support team with a justification for the request.

Configuring Additional IPs on Your Server

After an additional IP is assigned, you need to configure it on the operating system level so your server recognizes and uses it.

Ubuntu / Debian (Netplan)

Modern Ubuntu uses Netplan for network configuration. Edit the Netplan configuration file:

sudo nano /etc/netplan/01-netcfg.yaml

Add the additional IP under the addresses section:

network:
  version: 2
  ethernets:
    eth0:
      addresses:
        - 203.0.113.10/24
        - 203.0.113.11/24
      gateway4: 203.0.113.1
      nameservers:
        addresses:
          - 8.8.8.8
          - 8.8.4.4

Apply the changes:

sudo netplan apply

CentOS / AlmaLinux (NetworkManager)

Create a connection profile for the additional IP using nmcli:

sudo nmcli connection modify eth0 +ipv4.addresses "203.0.113.11/24"
sudo nmcli connection up eth0

Debian (Traditional ifconfig)

On older Debian systems, edit /etc/network/interfaces:

sudo nano /etc/network/interfaces

Add a virtual interface for the new IP:

auto eth0:1
iface eth0:1 inet static
    address 203.0.113.11
    netmask 255.255.255.0

Restart networking:

sudo systemctl restart networking

Verifying the Configuration

After configuring the additional IP, verify it is active:

# List all IP addresses
ip addr show
Test that the IP responds
ping -c 4 203.0.113.11

From another machine, try to reach the new IP:

ping 203.0.113.11

Configuring Services on Specific IPs

Apache Web Server

To bind Apache virtual hosts to specific IP addresses, edit your virtual host configuration:

<VirtualHost 203.0.113.10:80>
    ServerName site1.example.com
    DocumentRoot /var/www/site1
</VirtualHost>
<VirtualHost 203.0.113.11:80>
    ServerName site2.example.com
    DocumentRoot /var/www/site2
</VirtualHost>

Nginx Web Server

Bind Nginx server blocks to specific IPs:

server {
    listen 203.0.113.10:80;
    server_name site1.example.com;
    root /var/www/site1;
}
server {
    listen 203.0.113.11:80;
    server_name site2.example.com;
    root /var/www/site2;
}

Restart the web server after making changes:

# Apache
sudo systemctl restart apache2
Nginx
sudo systemctl restart nginx

Setting Up DNS for Additional IPs

For each additional IP, create an A record in your DNS configuration:

• site1.example.com → 203.0.113.10
• site2.example.com → 203.0.113.11

Removing an Additional IP

If you no longer need an additional IP address:

Important: Before removing an IP, ensure no critical services, DNS records, or SSL certificates depend on it.

What to Do Next

• Server Networking — IPs, DNS, Reverse DNS — Full networking configuration guide.
• SSL/TLS Certificates — Setup & Renewal — Secure each IP with SSL.
• Managing Server Add-ons — Explore other add-on services.
• Server Firewall Hardening Guide — Secure all your IP addresses.