IPv6 Support

IPv6 Allocation

When you launch a cloud instance, you automatically receive:

Verifying IPv6 Connectivity

Our cloud images are pre-configured with IPv6 support. Check if IPv6 is working:

# Check IPv6 address
ip -6 addr show

# Test IPv6 connectivity
ping6 google.com

# Or test specific DNS server
ping6 2001:4860:4860::8888

Manual IPv6 Configuration

If you installed from ISO or need to manually configure IPv6:

# /etc/netplan/01-netcfg.yaml
network:
  version: 2
  ethernets:
    eth0:
      dhcp4: true
      dhcp6: true
      accept-ra: true

netplan apply

# /etc/sysconfig/network-scripts/ifcfg-eth0
# Add these lines:
IPV6INIT=yes
IPV6_AUTOCONF=yes
DHCPV6C=yes

systemctl restart network

Using Multiple IPv6 Addresses

You can assign additional IPv6 addresses from your /64 subnet:

# Add additional IPv6 address
ip -6 addr add 2001:db8:1234:5678::2/64 dev eth0

# Make it persistent (Ubuntu/Debian with Netplan)
# /etc/netplan/01-netcfg.yaml
network:
  version: 2
  ethernets:
    eth0:
      dhcp4: true
      dhcp6: true
      addresses:
        - 2001:db8:1234:5678::2/64
        - 2001:db8:1234:5678::3/64

IPv6 Firewall Configuration

Don't forget to configure your firewall for IPv6:

# Enable IPv6 in UFW
echo "IPV6=yes" >> /etc/default/ufw

# Allow specific ports
ufw allow 80/tcp
ufw allow 443/tcp

# Firewalld automatically handles both IPv4 and IPv6
firewall-cmd --permanent --add-service=http
firewall-cmd --permanent --add-service=https
firewall-cmd --reload

IPv6 DNS Configuration

To make your services accessible via IPv6, add AAAA records to your DNS:

example.com.     IN  A     198.51.100.10
example.com.     IN  AAAA  2001:db8:1234:5678::1
www.example.com. IN  A     198.51.100.10
www.example.com. IN  AAAA  2001:db8:1234:5678::1

Testing IPv6 Websites

• test-ipv6.com - Check your IPv6 connectivity
• ipv6-test.com - Test website IPv6 support
• curl -6 https://example.com - Force IPv6 connection

Benefits of IPv6