Ubuntu – the alternative for Teamviewer?

There's no need of an alternative if you have an Android device with you. The idea is to forward the traffic from your Linux machine to the Android device running Psiphon. Follow these steps:

1. Install Psiphon on your Android device. Once installed, always make sure the "Tunnel Whole Device" option is checked. Tap connect and verify Internet connectivity (Redundant but necessary).
2. Install SSHdroid on your Android device. By far the best SSH server app I've ever come across. Start the SSH server. If necessary, change the SSH port from 22 (default) to some other number, say 5555.
3. Now, we somehow need to forward the traffic on your Linux machine to the Android device which is running Psiphon. By doing so, we are effectively connecting your Linux machine to the Internet through Psiphon via your Android device. To do so, make sure your Linux machine and the Android device are in the same LAN and then, fire up the terminal on your Linux machine and type ssh -D 8000 -fCqN username@address -p 5555. The details of this command are beautifully explained in this article which I highly recommend you to read. In brief, this command creates a local SOCKS proxy server at 127.0.0.1:8000 which maintains a SSH tunnel that connects your Linux machine and the Android device. Use 'username@address' given by SSHdroid. The default password is admin. We now need to forward the traffic to this server using sytem-wide proxy and the rest will be taken care of by this server.
4. If on Ubuntu, go to System settings > Network > Network Proxy. Select Method: Manual. Put 127.0.0.1 in the Socks host field and change the port to 8000 (as used in the command). At this step, by forcing system-wide proxy, we are forwarding our traffic to 127.0.0.1:8000 where our local SOCKS proxy server is running which then forwards the traffic to the Android device through the SSH tunnel, which ultimately means your Linux machine is effectively using Psiphon.

If this works for you, you can probably write a script and automate the entire process. Other direct alternatives to Psiphon are highly limited in either bandwidth or data or both, but so is Psiphon as of today. To get around this, use Psiphon client version 103 for literally unlimited access.

At present Teamviewer does not support Wayland:

At the moment, our developers are working on a Linux Native version for Linux but there's no release date or information about features included. I will forward your suggestion to support Wayland our product management team.

Until this was resolved we should switch back to Xorg:

• How do you switch from Wayland back to Xorg in Ubuntu 17.10?