Three network interfaces per VPS
Every ColossusCloud VPS comes with three separate network interfaces:
Public IPv4 (eth0)
Primary network interface for internet connectivity. Each VPS includes one public IPv4 address by default for web traffic, SSH access, and general connectivity.
Private VLAN (eth1)
Private network interface using 192.168.0.0/20 address range. VPS instances communicate with each other over private networks without public internet exposure.
Use cases:
- Database servers only accessible from application servers
- Internal APIs and microservices
- Cluster communication for distributed applications
- Backup traffic between servers
Private VLAN is disabled by default, enabled through the control panel.
IPv6 (eth2)
Dedicated interface for IPv6 connectivity. Each VPS receives one IPv6 address from a /64 block. Like private VLAN, IPv6 is disabled by default and enabled via control panel.
Why IPv6 has its own interface
We separated IPv6 into its own network interface for ease of use.
With dedicated interfaces, enable or disable IPv6 through the control panel without manually editing server network configuration files. No /etc/network/interfaces modification or complex dual-stack configurations.
Want IPv6? Enable the interface. Changed your mind? Disable it. IPv4 connectivity remains unaffected.
Larger IPv6 subnets available
Single IPv6 address included is enough for basic connectivity. For more addresses, request additional subnets:
/64 subnet
18 quintillion IPv6 addresses (18,446,744,073,709,551,616 exactly). Standard subnet size for single network segments, more than enough for virtually any application.
/56 subnet
Contains 256 /64 subnets, providing flexibility to subdivide across multiple purposes or virtual networks.
Both subnet sizes route directly to VPS IPv6 interfaces. Configure addresses on servers as needed.
IPv6 availability by data center
IPv6 is rolling out across our network:
| Data center | IPv6 status |
|---|---|
| Silicon Valley | Available now |
| Singapore | Available now |
| Amsterdam | Available now |
| Las Vegas | February 2026 |
| Dallas | Before summer 2026 |
| Ashburn | Before summer 2026 |
Getting started with IPv6
- Log into ColossusCloud control panel
- Navigate to VPS server list
- Click gear icon next to VPS to configure
- Click Info / IPs tab
- Enable IPv6 interface
- If needed, request /64 or /56 subnet
IPv6 interface is already present in VPS. No OS-level configuration needed. Just enable in control panel and start using IPv6 addresses.
Get VPS with IPv6 support and enable routed IPv6 subnets.