Linux Client Permissions Issue

Describe the bug The Outline-Client.AppImage application for Linux has a permissions issue. The client states that it needs administrative privileges (assuming they are to make needed network interfaces). But launching the client with administrative privileges is prohibited by the client itself.

To Reproduce Steps to reproduce the behavior:

1. Install Outline-Manager.AppImage and setup server.
2. Download the Linux client
3. Make the client executable with chmod u+x Outline-Client.AppImage
4. Launch the client application with ./Outline-Client.AppImage
5. Click the connect button.
6. Observe the error.

Expected behavior I expected the client to connect to me to my server.

Screenshots

Desktop (please complete the following information):

• OS: Arch Linux, i3wm
• Browser: N/A
• Version: 1.22

[afaikiac]

I had the same bug. The problem appeared after a kernel update. It happens because there is no kernel module TUN. This can be checked with the following command:

$ sudo dmesg | grep TUN
[   26.091113] tun: Universal TUN/TAP device driver, 1.6

Outline needs to create a TUN interface to work properly.

$ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.31.1    0.0.0.0         UG    304    0        0 wlan0
10.0.85.0       0.0.0.0         255.255.255.0   U     0      0        0 outline-tun0
192.168.31.0    0.0.0.0         255.255.255.0   U     0      0        0 wlan0

If you don’t get this output, simply reboot and check again.

If it is still missing, add a TUN kernel module and reboot.

sudo modprobe tun
lsmod | grep tun
reboot

I hope it helps.

[ragazzone]

I make it run it using this command:

sudo outline-client --no-sandbox

Very annoying, but it worked.

Doesn’t work for me. Just a blank window. Ubuntu 22.04

UPDATE: xhost + local: Solved the issue