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    <h2><a href="https://wiki.asterisk.org/wiki/display/AST/Secure+Calling+Tutorial?focusedCommentId=21463333#comment-21463333">Secure Calling Tutorial</a></h2>
        <h4>Page
        <b>comment added</b> by              <a href="https://wiki.asterisk.org/wiki/display/~rogermac">Carlo Rogialli</a>
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       <p>Dear Malcolm, thanks for this great tutorial.<br/>
One thing is unclear to me, and I believe it's worth an additional line.</p>

<p>If the client is a mobile device (e.g. an iPhone running Bria hooked up to a mobile network or a wlan) how can anyone generate a certificate? The -C option requires an IP or a DNS name, but in the case I outlined above the IP is STRONGLY dynamic and the DNS doesn't exist...</p>

<p>Must I assume that TLS is available only for on-lan, static clients? Or there is something I don't know?</p>

<p>Thanks</p>

<p>Carlo</p>
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