Binary package “strongswan-ikev1” in ubuntu trusty

strongswan IKEv1 daemon, transitional package

 The strongSwan VPN suite uses the native IPsec stack in the standard
 Linux kernel. It supports both the IKEv1 and IKEv2 protocols.
 .
 This package used to install the pluto daemon, implementing the IKEv1
 protocol. It has been replaced by charon in the strongswan-ike package.