How to configure bridged networking for KVM virtual machines in Kali Linux host?

My base/host machine is running Kali Linux. It is a fresh install. My purpose is to configure the use of Bridged network mode in the KVM virtual machines I install and run on top of this host OS. I tried to follow this video tutorial. Following are the details.

During installation of host OS, I got the following question and I selected wlan0 . Also, during the installation, I was asked for the password of WiFi, and it got connected to Wifi. The WiFi device gets internet from outside via an ethernet cable connected into it.

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After installation of the OS, the network situation is like this:

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Then I went ahead and followed the entire YouTube tutorial linked above. Initially, *i.e. before editing /etc/network/interfaces, my /etc/network/interfaces file, and my network interfaces situation looked like below:

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I followed the tutorial and edited the /etc/network/interfaces file, after which it looked like as follows. Notice how the state of br0 is unknown. Shouldn’t it be up?

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After sudo systemctl restart networking, my internet stopped working. I could not even ping gateway (192.168.10.1) and kept getting Destination Host Unreachable. My question is why and what do I do to fix it?

Asked By: Shy

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The problem here is not Kali. While I in general agree that Kali is not a good choice if you don’t need Kali, it should support bridging.

But bridging with wifi is difficult.

In this case I would suggest the following possibilities:

  1. Use Ethernet, and bridge that. I don’t see any mistakes in the configuration here, so I believe this should work.
  2. Use NAT or L3 forwarding with WiFi.
  3. Use a product such as VMWare that’s able to emulate bridging over WiFi, by using some arcane black magic.
Answered By: vidarlo