How to configure IPv6 on your server

Updated 10/23/2026

IPv6 is the new generation of IP addresses, with a practically unlimited space. More and more visitors connect over IPv6, so it is worth enabling.

1. Check if you already have IPv6

ip -6 addr

If you see an address starting with something like 2001:, you already have IPv6.

2. Test connectivity

ping6 -c 4 google.com

3. Add an AAAA record

So the domain answers over IPv6 too, add in DNS:

example.com.   AAAA    2001:db8::10

4. Check from the outside

dig example.com AAAA +short

Firewall and IPv6

Do not forget that firewall rules must cover IPv6 as well. UFW handles both automatically when enabled correctly, see How to set up a firewall with UFW.

Your server is now reachable over both IPv4 (A record) and IPv6 (AAAA record), see DNS record types.

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