I tried all fucking day to use docker/docker-compose to set up a telnet server. port 23 was exposed, port 23 was forwarded on the host, ss -antl4 showed me that port 23 was listening, I try to telnet in to the host IP address connection refused, FU. check docker's iptables, nothing denying me access to the docker image. I try and I try and I fucking try.

I create an LXC container on proxmox, manually install telnetd, systemctl start telnetd "okey dokey :)" telnet to the LXC container that has a direct IP on my home network, no fucking problems.