Install vpnc-scripts by entering the following commands in the terminal:
sudo apt update sudo apt install vpnc-scripts
Description:
Network configuration scripts for VPNC and OpenConnect
This package contains scripts required to configure routing and name services when invoked by the VPNC or OpenConnect Cisco VPN clients. The primary script automatically configures network routes and name servers for the active VPN connection. It also provides hooks for executing custom actions at various stages of the connection and disconnection process. . An alternate replacement script is also provided that contains the VPN in a network namespace which is accessible via SSH.
Homepage: http://www.infradead.org/openconnect/vpnc-script.html
Version: 0.1~git20171005-1
Section: universe/net