Tried Proxmox virtualization and failed but not giving up

Yesterday almost the whole day I spent setting up my own virtualization environment with the help of Proxmox. I learned about Proxmox from @rishi556. He mentioned somewhere that he's been using it for managing virtual servers. I did learn some things from him. Thanks to him. I currently don't have a need to have my own virtual machines from the dedicated server I own. But I thought it would be a good learning to know and understand some fundamentals and wanted to give it a try. I actually decided this about a month ago but only yesterday did I get the time to explore.

I found some neat articles online that guided me through the process. I was able to do most of the things without any issues. I did learn a lot of things in this process but as my basics with networking are not very strong, I did not understand why and how some things are done. I did spend a lot of time finding answers by myself but couldn't help it. I then got frustrated and went to sleep. Today morning when I woke up, I realized that I should try this some other time and decided to clean the server and keep using the dedicated server as it is.

Basically below were the steps I found online and this is what I was trying to do.

Get a dedicated server (in my case it was Hetzner)
Boot it into the rescue system
Install Debian 11 (Bullseye)
Install Proxmox VE 7
Login to the GUI for Proxmox
Configure Linux Bridge vmbr0
Create Virtual Machine
Install Ubuntu Server 20.04.4 LTS on it
Configure Networking

I was able to do everything in the above list except for the last one. I did not understand how the configuration on my Virtual machine works. I tried multiple configurations and none of them helped me reach the Internet. I was also not sure if I would need more additional ipv4 to assign to my virtual machines. I was also thinking maybe with ipv6, additional IP purchasing may not be required but I don't know that for sure.

Configuring networking is the step where I have to make the Virtual machine connect to the internet through the network device of the host. I should also be able to access the virtual machine from the outside world as well. From inside Proxmox, I was able to connect to the virtual machine easily but don't know how to configure it to be accessible from the outside world. This is where I got stuck and I did not find any useful information available online. I have to say that there were a few detailed articles available from Hetzner itself but those documents did not make sense to me. That is when I gave up and decided to make myself a little strong on the fundamentals of networking before I try something like this.

The first learning is always going to be difficult. For someone who used Windows for several years now, Linux is a good learning curve. I'm glad that I have been able to explore Linux for the last 5 years. Should have done that long back but never too late.

Abusing Hetzner

I received an abuse email from Hetzner today saying that I was using some unallowed MAC addresses which I'm not supposed to use. They asked for a statement from me and asked me to update the configurations. I was scared a little bit because the email also mentioned that they would use my personal information to take legal action if required. I immediately reviewed the server configurations I messed up and I actually decommissioned the VM itself.

I knew somehow this was going to be the problem because I was not sure about the network configuration I did. Maybe I was using the incorrect IP addresses that were referring to another MAC address. After I removed the VM and asked them to retest it, they reported back saying the issue is resolved. I did give them a written statement explaining what happened.

I'm going to scrap everything I did yesterday and going to install a fresh version of Ubuntu Server 20.04.4 LTS and start using that as one giant server instead of individual virtual machines for the time being. This way, I can at least continue my pending work than doing additional explorations. I will get back to Proxmox later when I have again had time for exploration.

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