Cisco Anyconnect Linux
Single Sign On with Openconnect in Debian Linux
Install the following packages: network-manager-openconnect-gnome network-manager-openconnect
sudo apt install network-manager-openconnect-gnome network-manager-openconnect
In VPN settings set the user aget to either one of the following:
AnyConnect Linux_64 4.7.00136
AnyConnect Linux_64 4.10.07073