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<div>Strongswan 4.3.2 has just support <span class="Apple-style-span" style="font-family: -webkit-monospace; font-size: 16px; white-space: pre-wrap; ">ECP DH groups 19, 20, 21, 25, and 26 as well as ECDSA-256, ECDSA-384, and ECDSA-521 authentication via openssl plugin. Why Openswan is not? </span></div>