Log into your dedicated or cloud server as administrator.

Start
Click on: Server Manager

Click on: Local Server (On left pane)
Click on: Ethernet (IPv4 address assigned by DHCP, IPv6 enabled)
Under: Network Connections
Double Click on: Ethernet (Network)
Under: Ethernet Status
Under: General
Under: Activity
Click on: Properties
Under: Ethernet Properties
Under: Networking
Double Click on: Internet Protocol Version 4 (TCP/IPv4)
Under: Internet Protocol Version 4 (TCP/IPv4) Properties
Click on: General
Click on: Advanced (Bottom of page)
Under: Default Gateways (tab)
Under: TCP/IP Gateway address
Click on: Add
Add: Gateway Address (Ex: 192.168.1.1)
Note: You could add as much IP’s as you like.