Understanding IPv6 Basics for VPS Hosting

By Admin · Feb 25, 2026 · Updated Apr 23, 2026 · 202 views · 1 min read

Why IPv6?

IPv4 addresses (4.3 billion total) are exhausted. IPv6 provides 340 undecillion addresses, enough for the foreseeable future. Many hosting providers now include IPv6 with every VPS.

IPv6 Address Format

Full:     2001:0db8:85a3:0000:0000:8a2e:0370:7334
Short:    2001:db8:85a3::8a2e:370:7334  (consecutive zeros collapsed)
Loopback: ::1
All:      ::

Common Prefixes

Prefix	Type
`2000::/3`	Global unicast (public)
`fe80::/10`	Link-local (auto-configured)
`fd00::/8`	Unique local (private)
`::1/128`	Loopback

Check Your IPv6 Configuration

# View IPv6 addresses
ip -6 addr show

# Check IPv6 routing
ip -6 route show

# Test IPv6 connectivity
ping6 google.com
curl -6 https://ifconfig.co

Configure IPv6 on Ubuntu

Edit /etc/netplan/01-netcfg.yaml:

network:
  version: 2
  ethernets:
    eth0:
      addresses:
        - 198.48.63.241/28
        - "2001:db8::1/64"
      routes:
        - to: default
          via: 198.48.63.1
        - to: "::/0"
          via: "2001:db8::1"

sudo netplan apply

Dual-Stack Web Server

Nginx listens on both IPv4 and IPv6:

server {
    listen 80;
    listen [::]:80;
    listen 443 ssl;
    listen [::]:443 ssl;
    server_name example.com;
}

DNS for IPv6

Add AAAA records alongside your A records:

example.com.    300    IN    A       198.48.63.241
example.com.    300    IN    AAAA    2001:db8::1