Probably because pinging 127.0.0.1 is actually cheating. I don't have a loopback network interface inside Serenity, instead pinging "127.0.0.1" will go through

Probably because pinging 127.0.0.1 is actually cheating. I don't have a loopback network interface inside Serenity, instead pinging "127.0.0.1" will go through QEMU's SLiRP backend, ping lo0 on my host machine and then plumb the response back. I didn't think of this when making the video, I simply typed "ping 127.0.0.1" out of some reflex. So basically, I need to make a loopback interface. Putting that on my TODO list, thanks for noticing this!