{{tag>ubuntu linux desktop openvpn vpn troubleshooting}}

====== NetworkManager can't connect to openvpn ======

===== Cannot ioctl TUNSETIFF tun =====

When connecting via terminal and you get this error:

  Note: Cannot ioctl TUNSETIFF tun: Operation not permitted (errno=1)

And in logs:
  Options error: --key fails with '/home/user/pathto/VPN/some.key': No such file or directory (errno=2)

set an absolute path to the openvpn crt, ca and key files.

===== could not read Auth username =====

  ERROR: could not read Auth username/password/ok/string from management interface

Gnome network manager wasn't setting the proper Cipher in //VPN conn>Identity>Advanced...>Security//.
It was set as "Default". Change it to exact cipher shown in "data-ciphers" line in openvpn config file itself.

==== Tested on ====
  * Ubuntu 24.04
  * Gnome Network Manager ver. 1.46.0
====== See also ======

====== References ======