[SOLVED] After installing on Debian 11, I cannot access the Webpage.

[WhiteTiger]

I installed Debian 11 on the server and then connected via SSH to install Proxmox using this guide.

In Debian I was using en01 with a default IP assigned by DHCP.

Now in /etc/network/interfaces I see iface en01 inet dhcp but with ip a I see
eno1 <BROADCAST, MULTICAST> mtu 1500 qdisk noop state DOWN group default qlen 1000 altname enp3s0f0.

There is no IP to connect to although the console always reports https: // SERVER-IP: 8006.

 

[WhiteTiger]

Comparing the configuration of a Debian 11 server I noticed that a line is missing in /etc/network/interfaces.
allow-hotplug eno1

Added by hand, the network is accessible again.
So, I believe that the guide needs to be updated.