In short: IPv6 makes your service directly reachable from modern IPv6 networks and reduces reliance on increasingly scarce IPv4 space. Running IPv4 and IPv6 together gives visitors the broadest compatibility during the transition.
Why it matters
- Some users and mobile networks are primarily IPv6 and translate only when they must reach IPv4.
- Direct IPv6 connectivity avoids unnecessary translation layers.
- New infrastructure can scale without depending on a dedicated public IPv4 address for every service.
- Testing now avoids a rushed migration later.
It is not only a DNS change
Publishing an AAAA record tells clients where to connect, but the server and application must also listen on IPv6. Firewalls, monitoring, rate limits and access-control rules must cover both protocols.
Common mistake: Securing only IPv4. Review IPv6 firewall policy and logs whenever you enable a service on both protocols.
A practical approach
- Assign and configure the IPv6 address.
- Test the application directly over IPv6.
- Apply equivalent security and monitoring controls.
- Publish the AAAA record.
- Test from an external IPv6 connection and continue monitoring both paths.
