Mio

What do you use for desktop?

I have never understood why there is no protocol that allows for multi-master node setup(if a message is written to one, then queue to write to the second one and ignore timestamp missmatchning and conflict resolution(It does not have to be perfect) - matrix put too much effort into this IMO).

For family i use Signal. My coworkers use IRC and I have it setup in link-mode for multi master support(but IRC does not have new features like send image, thread, reactions, emoji, text-styling, audio/video calls). Using unrealircd. Neat when the local city network is up but the fiber connection from the city network to the internet is down so I can still write to some friends, or dont care about uptime on my server since they fallback to the second, free, Oracle VM.

Yes, that is the hard part. But it can be done. Geoip blocking like only allow your country - blocking every China or Russian user etc. If you are selfhosting home and worry about your SSH access, then you can do a lot of things to block then early. It is all about authentication. Lets say you require VPN access in - example Wireguard. You could also do “port knocking” but that is not encrypted. You could require the user first has to be authenticated somewhere else, like require first Microsoft login and only then your ip is allowed.

I believe it is a good start with crowdsec but feels like it gives false protection. The blocking only happens after they have done a couple of attempts and not before.