Hi guys. An extra note regarding the customized ISOs.
About once a month I generate the new ISO I carry in my USB toolkit. As noted in this other thread, the only problem is Internet not working even when it connects fine and resolve external DNS like 8.8.8.8. The root cause is still unknown but in the meantime if you find yourself struggling with this issue, open the terminal and execute this two lines as soon as you boot your USB/VM:
sudo systemctl start systemd-resolved
sudo systemctl restart NetworkManager
And you will regain connectivity for as long as the live session last.
Regards. 