Ubuntu VM Can't get apache2 to work outside the network

[temal]

I am running Proxmox on a Raspberry Pi 5 (unofficially arm64 version). I set up an Ubuntu Server VM on the Proxmox interface, I installed only SSH, apache2 and PHP on the VM and I also enabled firewall and allowed 'Apache Full' and 'OpenSSH'. My */etc/apache2/sites-enabled/colinm_de.conf* config file looks like this:


I also have another file in this directory which looks like this


In my /var/www/colinm_de path I just have a simple index.html file with some text.
Now if I access 192.168.178.93 from any device within my network, I can view the website.
But now I also want that other people can view my website through the domain colinm.de, I already configured my Proxmox and VM to use static IP. So I went into my router settings and opened the port 80 (later on I can also open 443, if I get 80 to work) for the IP 192.168.178.93 and I went to my domain provider Namecheap.com and setup DNS configuration to following:
> A Record - @ - 192.168.178.93 - TTL to 1min
and
> A Record - www - 192.168.178.93 - TTL to 1min

Now if I want to access colinm.de following error occures in Chrome:
"Website unreachable. DNS_PROBE_FINISHED_NXDOMAIN" and when I try to access colinm.de through TOR Browser it first gives the warning that the connection is unsecure because it's not supported by HTTPS, then I press cotninue anyway and then following error occurs: "Website unreachable. ERR_SOCKS_CONNECTION_FAILED"

My /etc/hosts file in the VM looks like this:

127.0.0.1 localhost
127.0.1.1 ubuntu
127.0.1.1 colinm.de
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

I tried to inspect the error log file of apache2, but I dont think there is any important messages.

- My Proxmox IP: 192.168.178.10
- My Ubuntu VM IP: 192.168.178.93
- My router IP: 192.168.178.1

 

[Ernst T.]

and setup DNS configuration to following:
> A Record - @ - 192.168.178.93 - TTL to 1min

Your domain name must point to your external IP address and not to the address of the Ubuntu VM!

 

[ubu]

Private Networks Like 192.168.x.y, 172.16-31.x.y and 10.x.y.z are NOT routed on the internet.

If you have a static IP on your router you can set can do this setup with that IP and port forwarding