Looking for help with Nextcloud Docker, Apache Proxy, and IPv6

Apps and Virtualization
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1

I am running a Nextcloud instance using the official iX app on TrueNAS SCALE (24.10.2), with a Virtual Machine on the same host running Linux and Apache (using Virtualmin), acting as a Proxy for my Docker apps.

Router => (DMZ) => Virtualmin VM => (Proxy) => Docker Apps

When browsing to the site from a browser, or connecting to the site using the Nextcloud App on my Mac or my iPhone / iPad, everything works smoothly.

When I try to connect a Windows computer to it (using the Desktop app), I get an error about an SSL Handshake failure. I posted about it to the Nextcloud forums, and received a response that there is an issue with IPv6 in my setup:

I’m new to both Docker and IPv6 - what’s the best way to resolve this, so my Windows PCs can connect to Nextcloud?

Thank you for your help and guidance!

2

I was able to figure this out - my Virtualmin setup was assigning a bad IPv6 address to the proxy site. Once I manually updated it, it worked.