Version: PureOS 10 (byzantium)
Problem: Users reported that after recent upgrade internet is inaccessible. Seems that iptables firewall rules were set to block all traffic by default.
Workaround: Run following commands in terminal, one by one:
sudo iptables -P INPUT ACCEPT
sudo iptables -P FORWARD ACCEPT
sudo iptables -P OUTPUT ACCEPT
sudo iptables -t nat -F
sudo iptables -t mangle -F
sudo iptables -F
sudo iptables -X
(will not persist through reboot)
A user found out possible cause:
I think the changes the fixed it were to:
Uninstall gufw using:
apt-get purge gufw
rm -rf /etc/gufw
There was strange behavior with gufw, it would not stay enabled through a reboot. Enabling the default rule in gufw also made the network re-appear, however it would not stay enabled through a reboot.
This change, removing gufw, was not enough on it's own. It was also necessary to run:
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
As these would be defined as DROP after each reboot. I compared the tables with another installation of Byzantium without the latest updates and these changes made it identical. However upon restart these changes would also disappear.
So the next change was necessary:
apt-get install iptables-persistent
And then saving the rules with the above changes. This time upon restart the rules were persisted. Furthermore the 1 to 2 minute delay at both boot and at login were both gone now.
I am running a Librem14 (5.10.0-9-amd64) and was experiencing this same issue. Instead of purging gufw I needed to purge ufw. Before purging I noticed the ufw service was in a masked state after removing the package with apt. I also cleaned up /etc/ufw after the purge. I used the iptables rules in this bug report as a workaround and saved those to /etc/iptables/rule.v4 and .v6 so iptables-persistent would see them and rebooted. This fixed my issue, the networking was restored and the machine no longer would hang after decrypting the drive.
After the update I also had a issue with my sound were it longer seemed to recognize the onboard speakers. The first indication was that the sound icon was missing from the top tray. I'd also like to report this fixed the issue with the sound as well. After purging ufw, installing iptables-persistent and adding the iptables rules the tray icon came back and I tam able to play audio again.