Tailscale FTW. I honestly haven’t looked at the underlying protocols in years. Was using ubiquiti’s implementation of openVPN but it seemed to get grumpy when you connect one user multiple times.
Poking around at available products, I had settled on zero tier and tailscale, I went ahead and tried tail scalefirst because it was basically free for my house. One month in, I had a few decent detectable guys at work join me on a trial there. Full licenses for everybody at work cost less than my Cisco refresh. And makes it so that the office is no longer a critical hosting site.
OpenVPN allows multiple connections if you enable duplicate-cn:
–duplicate-cn
Allow multiple clients with the same common name to concurrently connect.
In the absence of this option, OpenVPN will disconnect a client instance upon connection of a new client having the same common name.
https://openvpn.net/community-resources/reference-manual-for-openvpn-2-4/
There’s also headscale if you wanna selfhost the tailscale control server:
https://github.com/juanfont/headscale
