Connecting remotely through OpenVPN and adding let's encrypt to Nextcloud

I have been running OMV for a couple of months now with Nextcloud, Jellyfin, and Bitwarden. Everything is connected to the Network through a PFSense Router. I really like it. It has been stable, backups are easy (both data and OS), and it's really easy to use. There are a few things that are stopping me from getting rid of some of my other online services.

One, is that I still haven't managed to access the system from outside my network. Preferably, I would like to do this with an OpenVPN connection so I am more protected. I followed some of the tutorials I found on Youtube, but none of them worked. I am not sure what the issue is but I feel like maybe there is some step I am missing.

The other major thing is that I am running a private certification which causes me to get a warning every time I access the Nextcloud. This wouldn't be a big deal except it blocks me from adding Nextcloud to Gnome accounts, which blocks me from seeing teh files on my desktop. Recently, I tried to sync Joplin notes to it and ended up with the same problem.

I would be very grateful if someone can help me solve these two issues.

I am trying to do it through the router, but so far have failed every time. I have used several different methods/howtos. I don't need an actual VPN right? Is there maybe some major step I am missing.

I tried that one as well as a few on Youtube and never got it working. Perhaps there is some setting on PFSense that is blocking it. I will try to reset PFSense to default and try again.

Preferably the whole system.

No, I haven't. I haven't managed to get OpenVPN to work yet. This si the first I have heard of Wireguard.

Yes, preferably on PFSense as I would like to access the local network, including all the files/apps on the server such as Nextcloud, Jellyfin, etc.

Zitat von gderf

You need an OpenVPN client application on the machine you will be connecting from. You do not need a third party VPN service.

This is the HowTo I used.

Code

https://chrislazari.com/pfsense-setting-up-openvpn-on-pfsense-2-4/

So, just to be clear. I don't need any kind of third party service. I just need to correctly setup my router and my computer? I don't need any kind of dynamic dns or dedicated IP?

Okay, maybe that is the step I am missing. I didn't have a dynamic DNS setup. Is there any security issue when using something like this?

Thank you for your help!