guac-install VS ogon

It maybe mine works because, you installed using docker and I used this guy's Guac install

I had it running in a Debian (9 or 10, it was a couple of years ago) LXC using this install script, maybe give it a try?

I'd suggest that instead of doing it on the base ProxMox install, do it in a debian 11 lxc container, using this install script that will do almost everything for you. You'll have to forward the public facing port from pmx to the lxc.

VPN, wireguard, blocking, chrome. I had a similar case and a perfect solution proved to be Apache Guacamole (https://guacamole.incubator.apache.org/). Absolutely clientless RDP/SSH access to any server with any common browser (HTML5). Works as a proxy for RDP/SSH (magic) Simple install on Ubuntu via https://github.com/MysticRyuujin/guac-install and an extra Nginx (see bottom of readme). Who needs OpenVPN anymore - I bet it cannot be locked down as long as you have the ubuntu public IP allowed.

I used the MysticRyuujin script to perform the upgrade and immediately had some issues based on an Ubuntu server 20.04.3 installation. No connections worked. The underlying issue is the guacd service listening on IPv6 and Tomcat working on IPv4.

However, I wanted to be able to access my guacamole instance remotely as well. I installed it using a script and have TOTP in front of it also, but I didn't like the idea of guacamole being accessible to the wider internet since it essentially has full access to my computers. I installed it a while ago in an LXC using this script.

I used the mysticryuujin's script here: https://github.com/MysticRyuujin/guac-install

As for xrdp, I love that project. Providing RDP access to linux seems to have much less latency to Guac than just raw VNC. Even though xrdp is connecting locally to VNC. One day I'll try ogon out. Once wayland is a but more universally usable.