There is little point in doing so - a SIP client can choose to send anything it likes in that header. It would be trivial to bypass such a restriction.<div><br></div><div>-Steve<br><div><br></div><div><br><br><div class="gmail_quote">

On 20 June 2013 11:16, Vincent Xia <span dir="ltr">&lt;<a href="mailto:gmangudai@gmail.com" target="_blank">gmangudai@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

<div dir="ltr"><div><br></div><div>normally a SIP REGISTER request will contain information about the terminal like:<br></div><div>User-Agent: X-LITE 3.0</div><div><br></div><div>so is it possible to have FS reject all softphone registering requests except, for example, X-LITE,</div>


<div>without changing FS source code?</div><div><br></div><div>BR</div></div>
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