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It's hard to tell if firewall is properly set up. So, the firewall now shows
only warnings.

Fix python3 case where bytes are returned

It fails if last update was performed more than two weeks ago

Fix edge case where there is no name in the analyzed line.

UFW status command result was not properly analyzed.

It just looks for ufw to be active. We should add rules to
see if another firewall is set up.

Host name was not properly extracted.

Check if a firewall is up

Fix typo in root password check

Improve host listening check