2&quot;, &quot;ffdhe4096&quot;, &quot;ffdhe6144&quot;, &quot;ffdhe8192&quot;, &quot;modp_2048&quot;, &quot;modp_3072&quot;, &quot;modp_4096&quot;, &quot;modp_6144&quot;, &quot;modp_8192&quot;.</p>

<p>The following additional values can also be used by OpenSSL&#39;s default provider: &quot;modp_1536&quot;, &quot;dh_1024_160&quot;, &quot;dh_2048_224&quot;, &quot;dh_2048_256&quot;.</p>

<p>DH/DHX named groups can be easily validated since the parameters are well known. For protocols that only transfer <i>p</i