If the site fails to load, they provide a mirror on their actual blog. The one linked by OP took over a second to load for me.

https://bogdanthegeek.github.io/blog/projects/vapeserver/

I’m interested in this as well. If you figure something out can you let me know?

I’ve bridged my SMS/MMS to a matrix chat server and call forward my number to a VoIP provider. This phone stays at home 100% of the time.

https://matrix.org/ecosystem/bridges/

I have a data only plan and use “acrobits: VoIP SIP softphone” for calls and “elements” for all my messages. When I travel I just get a local data sim and can use my Canadian number like I’m in Canada.

There’s also https://jmp.chat/ but I’ve never used it.

It’s not so much about the ports, its about what you’re running that’s accessible to the public.

If you have a single website on 443 and SSH on 22 (or a non-standard port like 6543) you’re generally considered safe. This is 2 services and someone would need to attack one of the two to get in.

If you have a VPN on 4567 and everything behind the VPN then someone would need to hack the VPN to get in.

If you have 100 different things behind 443 then someone just needs to find a hole in one to get in.

Generally ssh, nginx, a VPN are all safe and they should be on their own ports.