[regression] Multipass corrupts packet filter rules (iptables) on older distros such as Bionic #2183
Description
We have an issue that seems clearly related, and reproduction is even more fundamental (no name resolution involved, can't ping an ip address):
sudo docker run -it --rm alpine /bin/sh
/ # ping 1.1.1.1
works fine.
then on host system:
sudo snap install multipass
After that, the ping in the docker container stops working.
This error seems to have popped up relatively recently (ca. last week). We observed it first in a more complicated environment, where docker is used to run some CI, and multipass is run by snapcraft, but what I showed here is the minimal setup to reproduce it.
Originally posted by @julius-ziegler in #1435 (comment)