Using VPN and Trisquel

As far as I can see that client is proprietary software. Here is a free software solution, which is cheaper moreover: https://nordvpn.com/tutorials/linux/openvpn/

You are in luck! Just today, I setup Trisquel 8 with my VPN, NordVPN. The installation for GNU/Linux doesn't use a proprietary app so I believe its using all Libre tools. Have a look at how it's done: https://nordvpn.com/tutorials/linux/openvpn/

Same here. I'm using nordvpn + networkmanager + openvpn as described in the tutorial link given by davidgil.
It works flawlessly.

If you want to make sure if everything is tunneled and there are no leaks, you can use this little bash script that has the name "firewall.sh" on my computer. I don't know much about ufw but it seems to do the job:

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#!/bin/bash

sudo ufw reset
sudo ufw default deny incoming
sudo ufw default deny outgoing
sudo ufw allow out on tun0 from any to any
sudo ufw enable

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If you want to undo the firewall rules, I use a script called "unfirewall.sh":

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#!/bin/bash

sudo ufw reset
sudo ufw default allow incoming
sudo ufw default allow outgoing
sudo ufw enable

Thank you all!

If you have VOIP phone, then I guess you can't use the VOIP phone connection and the VPN connection at the same time.

I've seen ads for the Think Penguin VPN mini-router - can you use the mini-router and the normal internet connection (for VOIP phone use) at the same time?

Thank you!