Minecraft via Hamachi play is that still possible?

Hi, you can even set up a minecraft server, in the past we used hamachi to create an artificial lan network.
This does not seem to work in minecraft. Why is that?

Is there still a possibility to play online minecraft without renting a server? Will not synonymous free, the jerk usually.

Of course that still works. Minecraft does not matter which network is used there.

Hamachi Start, create network and join. Start singleplayer, open world in the LAN and already people can join.

Yes, it still works
A computer can be the host. Simply click in the game "Share in the LAN" Share this port in the router and tell the others the Internet IP and the port. The then give an IP.xxx.xxx.xxx: port

(Attention does not work with cable internet connections from Vodafone, UnityMedia or Kabel Deutschland)

3. Are also cheap Minecraft Hoster.

Yes, that still works, but I recommend Ngrok to you. With Ngrok you do not have to turn off the firewall, release any ports or anything else.

Here is a tutorial:

No one can join me I see the people on server short but then they are gone again and where they are never on it

I do not have a router I'm hanging on the university network

Interesting, that could work around the problem that at hamachi nobody can join me (I do not have a router but hang in the university network)

Impossible. So impossible. Because they use good firewalls. Then only hosted Minecraft remains.
Tip: better learn and hear what to play than Minecraft.