Lateley when I tried to delete a customer in the ISPconfig panel, I received an error:

CSRF attempt blocked.

After searching a long time in the internet without success I found the solution: If you try to delete a customer within ISPconfig this dialog opens up:

While upgrading my server, most probably while doing the upgrade to Ubuntu 20.04 Focal, mod-evasive got installed and enabled. It didn't effect the configured websites, except sometimes for a couple of  seconds I received 403 errors. But finally everything continued working. The problem started, after adding a new website and trying to install a new Joomla platform. The installation process of Joomla stopped on the very last step without any error message on the screen.

If you reiceive the following error while starting phpmyadmin in your browser:

This page isn’t working is currently unable to handle this request.

Most probably you have a conflict with your PHP version after upgrading to Ubuntu 20.04. If you have different PHP Versions installed, you need to tell phpmyadmin which Version to use.

By default OpenVPN runs on port 1194. This is quite nice, but often this port is not open in the firewalls. Therefor the OpenVPN server is unreachable. It also has advantages to run SSH on port 443. You may have fewer fake logins on the SSH server. In addition, port 22, or even any custom port such as 2020, is blocked by firewalls in most cases as well. If you simply put everything on port 443, this may not work, since Apache is already active for the SSL websites. And that's where SSLH jumps in.

If you have installed multiple PHP versions, you may want to be able to change the standard version without much effort. Log in to your server via SSH and enter the following command in the command line:

sudo update-alternatives --config php

(c)2020 - 2021 by Mike Ennulat