For non-Windows systems, I have used TeamViewer in the past and when they started being obnoxious reverted mostly to VNC derived alternatives. For Windows, I’d usually combined VPN with Remote Desktop.
Recently, I found out that during my first rectum cancer year (and for others, the first COVID-19 year), the development of RustDesk – which can be self-hosted – started as an open source project on [Wayback/Archive] GitHub – rustdesk/rustdesk: An open-source remote desktop application designed for self-hosting, as an alternative to TeamViewer. with their first commit being [Wayback/Archive] Initial commit · wabarc/wayback@650ea87 · GitHub.
I got pointed to this in [Wayback/Archive] Your Remote Desktop SUCKS!! Try this instead (FREE + Open Source) – YouTube.
One of the main things to figure out is how reliably RustDesk does firewall hole punching*.
Another personal interest is to learn more about Rust and Dart, the main programming languages in which RustDesk is written.
Here are some links:
The Wiert Corner - irregular stream of stuff 