Here is a diagram from the ProfitBricks Data Center Designer (DCD) of the example infrastructure.īy default, the ProfitBricks DCD will dynamically assign the gateway server a public IP address. Further internal servers will follow a similar configuration as this server. The secondary network interface, eth1, will be assigned an IP address of 10.0.0.1 with a connection to the private network over LAN 2.Ī second, internal server, named node1 will reside on the private network on LAN 2 with an IP address of 10.0.0.2. The primary network interface, eth0, of the gateway will be assigned a public IP address of 203.0.113.110 with a connection to the public Internet through LAN 1. The example infrastructure will consist of a single gateway server bridging the public Internet and private subnet. One or more nodes with one network interface.One gateway server with two network interfaces.While beyond the scope of this tutorial, the gateway server firewall can be modified to restrict outbound traffic from the subnet. Externally generated traffic will reach the gateway and have no visibility of the private subnet. The traffic from the internal servers will appear to be originating from the gateway IP address. IP forwarding and a NAT rule are then used to route traffic from the private subnet out to the external network. One NIC will connect to an external, or public, network while the other NIC will connect to the private subnet. An example may include downloading a software package, sending backup data to an external location, or applying system updates to servers on the private subnet.Ī Linux gateway server with two network interfaces, or NICs, can be used to bridge two networks together. While there may be no need for incoming connections to access the private network from the outside, there are occasions when you may need servers within the private subnet to make connections to services outside of the subnet or to the public Internet. A common network infrastructure may consist of an private network on an isolated subnet.

Configuring centos 7 static ip