Ytdyklly

I have network-manager-openconnect-gnome installed, but there is no option for OpenConnect in Network Manager. If I run

sudo openconnect vpn.work.com

And enter my details, I can connect to my work VPN, so openconnect is installed and working, but it just isn't showing up in Network Manager.

ubuntu man page

VPN support
Network Manager VPN support is based on a plug-in system. If you need VPN support via network manager you have to install one of the following packages:


network-manager-openvpn
network-manager-vpnc
network-manager-openconnect


The network-manager-pptp plugin is installed by default.

On GNOME, you also need to install the -gnome packages for the VPN plugin you choose:


network-manager-openvpn-gnome
network-manager-vpnc-gnome
network-manager-openconnect-gnome


This should generally be solved by restarting your machine, and if you don't want to do so try:

# reloads all new or changed systemctl units

sudo systemctl daemon-reload

and then

# restart the network daemon

sudo service network-manager restart

I also have "grayed out VPN" in Network-Manager this is what I found
(I'm Newbie)

On Ubuntu 16.04 the network-manager-openconnect and network-manager-openconnect-gnome plugins are not usable because they are to old to use with the current version of network-manager.

This is the english version of this guide from a german ubuntu support forum - Fixing unusable network-manager-openconnect-plugin on Xenial Xerus

Unofficial built packages are available here:

http://tomtomtom.org/networkmanager-openconnect_1.1.93-1_i386.deb

http://tomtomtom.org/networkmanager-openconnect_1.1.93-1_amd64.deb

NOTE: You won´t get any security updates for this! It is just a workaround until the packages will have been fixed in the official repository!

The same problem. Couldn't start sudo apt-get network-manager-openconnect
problem - have no candidate for 'openconnect'

Solution:

sudo add-apt-repository ppa:openconnect/daily

sudo apt-get update

Source - https://launchpad.net/~openconnect/+archive/ubuntu/daily and try to install.

None of the answers here are correct based on the question. For completeness (since this seems to be the only question that comes up when googling the problem):

This will fix the issue on 16.04+

sudo apt install network-manager-openconnect network-manager-openconnect-gnome

The *-gnome package is needed for the GUI components. Note that a reboot is required in order to see the change.

here is what fixed the issue on my ubuntu 18.10 installation:

after installing the network-manager pluings using

sudo apt install network-manager-openconnect network-manager-openconnect-gnome

I had to reboot my system. simply restarting network-manager did not help, so it must be something else like a gnome component or so, that needs to be restarted as well