Binary package “strongswan” in ubuntu xenial

IPsec VPN solution metapackage

 The strongSwan VPN suite uses the native IPsec stack in the standard Linux
 kernel. It supports both the IKEv1 and IKEv2 protocols.
 .
 This metapackage installs the packages required to maintain IKEv1 and IKEv2
 connections via ipsec.conf or ipsec.secrets.