A private network connects multiple VPS servers over an internal network, allowing them to communicate without exposing traffic to the public internet β ideal for database servers, application clusters, and load balancers.
Enabling a Private Network
Contact Double Hosting support to enable private networking for your VPS instances. Once enabled, each VPS will have an additional private network interface (e.g., eth1) with a private IP address.
Configuring the Private Interface
On Ubuntu, add the private interface configuration to /etc/netplan/. On CentOS, configure /etc/sysconfig/network-scripts/ifcfg-eth1. The private IP and subnet are provided by Double Hosting when the network is provisioned.
Common Use Cases
- Web server on one VPS connects to MySQL server on another via private IP β database port never exposed publicly
- Load balancer distributes traffic to multiple web servers over private network
- Redis or Memcached cache server accessible only to application servers