connections {

   host-host {
      local_addrs  = 192.168.0.1
      remote_addrs = 192.168.0.2 

      local {
         auth = pubkey
         certs = moonCert.pem
         id = moon.strongswan.org
      }
      remote {
         auth = pubkey
         id = sun.strongswan.org 
      }
      children {
         host-host {
            updown = /etc/updown 
            esp_proposals = aes128-sha256-x25519
         }
      }
      version = 2
      mobike = no
      proposals = aes128-sha256-x25519
   }
}