strongswan 5.1.1-0ubuntu16 (arm64 binary) in ubuntu trusty

 The strongSwan VPN suite is based on the IPsec stack in standard Linux 2.6
 kernels. It supports both the IKEv1 and IKEv2 protocols.
 .
 StrongSwan is one of the two remaining forks of the original FreeS/WAN
 project and focuses on IKEv2 support, X.509 authentication and complete PKI
 support. For a focus on Opportunistic Encryption (OE) and interoperability
 with non-standard IPsec features, see Openswan.
 .
 This metapackage installs the packages required to maintain IKEv1 and IKEv2
 connections via ipsec.conf or ipsec.secrets.