connections {

   host-host {
      local {
         auth = pubkey
         certs = sunCert.pem
         id = sun.strongswan.org
      }
      remote {
         auth = pubkey
      }
      children {
         host-host {
            updown = /usr/local/libexec/ipsec/_updown iptables
            esp_proposals = aes128gcm128-x25519
            mode = transport
         }
      }
      version = 2
      mobike = no
      proposals = aes128-sha256-x25519
   }
}
