Any of the four NTRU parameter sets can be selected

testing/tests/ikev2/net2net-ntru-cert/hosts/moon/etc/strongswan.conf

@@ -5,3 +5,11 @@ charon {
   multiple_authentication = no
   send_vendor_id = yes
 }
+
+libstrongswan {
+  plugins {
+    ntru {
+      parameter_set = optimum
+    }
+  }
+}