Recently, I made some first steps with KVM virtualization. So far, everything went well and as expected. The performance was great and the configuration with tools like "Cockpit" straightforward.
As soon as I tried to run TCP or UDP services inside the machines, I realized that the host firewall blocked everything, that has not been allowed, although I thought that bridged network devices would not interfere with the host's network settings at all.
Using one of the currently available browser add-ons for Internet Explorer, Firefox, Chrome or whatever does not make any sense regarding browsing speed, security and centralised management, especially in scenarios where URLs need to be filtered for security reasons but not for (mostly not working) censorship purposes.
Here, I would like to describe a way to filter download URLs with all the available engines provided by Virustotal.
I spent hours of surfing the web and looking for a working solution to connect my IPFIRE with a FritzBox in another country.
The following solution is working so far, but I still did not get a reliable VoIP connection, so this should be seen at least as a good starting point.