ipv6 not working with NPM in Docker

Checklist

• Have you pulled and found the error with jc21/nginx-proxy-manager:latest docker image?
  • Yes
• Are you sure you’re not using someone else’s docker image?
  • Yes
• Have you searched for similar issues (both open and closed)?
  • Yes

Describe the bug til now i only used ipv4 and npm was working fine, even with an Access List. Now i am beginning to switch to ipv6. When no Acces List is set, NPM works fine with ipv6. But when i activate an Access List, i get a 403 Forbidden. Even when i allow my ipv6 Subnet in the Access List.

Nginx Proxy Manager Version v2.9.12

To Reproduce Steps to reproduce the behavior:

1. add your ipv6 and ipv4 to an access list
2. add this access list to a Website that is routed throug npm
3. open the Website, that is routed through npm and has an access list.
4. see 403 Forbidden

Expected behavior open the Website even when coming from ipv6, only if in access list allowed

Screenshots

my Access List

Operating System nmp is installed on a debian 10 (buster 10.10) in docker 20.10.8, build 3967b7d with enabled ipv6

Additional context For testing i installed nmp on a alpine Proxmox LXC, with the same Access List. There it was working like a charme.

I found out, that when i am coming from a ipv6 subnet, then this ipv6 IP is natted to a Docker-Internal ipv4 address. Even within a internal ipv6 network it is natted to a internal ipv6-address.

[swoop124]

ok. i’ve installed a complet new alpine-lxc on my Proxmox Server and deployed npm. now it is working as expected. even with ipv6.

the only problem was, that i had to configure all my domains an certificates once again, so it would be very goot, if there is a export and import funktionality.

regards

[Intenos]

I just found that it works with jlesage/nginx-proxy-manager.