Version 4.4.0¶

• The IKEv2 High Availability plugin has been integrated. It provides
  load sharing and failover capabilities in a cluster of currently two nodes,
  based on an extend ClusterIP kernel module (for details see HighAvailability).
  The development of the High Availability functionality was sponsored by
  secunet Security Networks AG.

• Added IKEv1 and IKEv2 configuration support for the AES-GMAC
  authentication-only ESP cipher. Our aes_gmac kernel patch or a Linux
  2.6.34 kernel is required to make AES-GMAC available via the XFRM
  kernel interface.

• Added support for Diffie-Hellman groups 22, 23 and 24 to the gmp, gcrypt
  and openssl plugins, usable by both pluto and charon. The new proposal
  keywords are modp1024s160, modp2048s224 and modp2048s256.
  Thanks to Joy Latten from IBM for her contribution.

• The IKEv1 pluto daemon supports RAM-based virtual IP pools using
  the rightsourceip directive with a subnet from which addresses
  are allocated.

• The ipsec pki --gen and --pub commands now allow the output of
  private and public keys in PEM format using the --outform pem
  command line option.

• The new DHCP plugin queries virtual IP addresses for clients from a DHCP
  server using broadcasts, or a defined server using the
  charon.plugins.dhcp.server strongswan.conf option. DNS/WINS server information
  is additionally served to clients if the DHCP server provides such
  information. The plugin is used in ipsec.conf configurations having
  rightsourceip set to %dhcp.

• A new plugin called farp fakes ARP responses for virtual IP addresses
  handed out to clients from the IKEv2 daemon charon. The plugin lets a
  road-warrior act as a client on the local LAN if it uses a virtual IP
  from the responders subnet, e.g. acquired using the DHCP plugin.

• The existing IKEv2 socket implementations have been migrated to the
  socket-default and the socket-raw plugins. The new socket-dynamic plugin
  binds sockets dynamically to ports configured via the left-/rightikeport
  ipsec.conf connection parameters.

• The Android charon plugin stores received DNS server information as "net.dns"
  system properties, as used by the Android platform.