Reverse Proxy Stops Working When DuckDns updates IPv6

[carnby77]

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. crt.sh | example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is: aitd1977.duckdns.org

Hi Sorry for not using the template. But this issue cant seem to match the template

The Problem;
Recently duckdns updates IPv6 when my public IP changes.
When it updates IPv6, all the reverse proxy ssl certs become invalid and shows error page.
All the SSL certs are obtained via Nginx Proxy Manager.

This problem just started happening past 1 week.
How do you make sure that duckdns only updates ipv4 and not the ipv6 box?

Thank You in advance.

[MikeMcQ]

@carnby77

How do you make sure that duckdns only updates ipv4 and not the ipv6 box?

That sounds like a great question for a duckdns forum.

[Osiris]

The one thing I'm not getting from your post how your issue is related to a (Let's Encrypt) certificate? Probably because you're just saying "become invalid and shows error page" whereas I don't have a crystal ball and thus I don't know the actual error presented to you.

[rg305]

Are you using the IP within the <VirtualHost> line?

[carnby77]

Nope. No virtual host

[rg305]

Let's see the nginx config:
nginx -T