I recently upgraded from Ubuntu 17.04 to 17.10. Unfortunately it affected quite some configurations of the OS and applications too. I used a customized vpn client by cicsco systems, its called 'anyconnect'. You do download it personalized & preconfigured from the universities website. After upgrading the OS it does not start at all. Any hints ideas. Since also other confugurations are affected e.g. it is an option to reverse the process of upgrading.