I try to setup a vpn client on my ubuntu desktop. I know that some packet are now deprecated and not supported in 16.04. I've tried to run sudo apt-get install strongswan network-manager-strongswan
like suggested this link but it doesn't seems to change anything. I only get the PPTP protocol under "new VPN connection"
I manage to get the VPN working for windows, macos and even ios but since the recent release of ubuntu and debian it looks like a real nightmare to configure L2TP/IPsec on those platform