<p>Thats great . Thanks guys.<br>
Well looking into xml_curl , i cant see where am i getting that param. It says that the xml file is posted on the binding url. Do i have to write a script that can handle that xml file and retrieve my interested parameters? Correct? And do we have any such script on wiki?</p>

<div class="gmail_quote">On Dec 4, 2013 10:40 PM, &quot;Steven Ayre&quot; &lt;<a href="mailto:steveayre@gmail.com">steveayre@gmail.com</a>&gt; wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Remember that the User-Agent can be changed by the caller, they can send anything they choose. Don&#39;t authenticate on it alone.</div><div class="gmail_extra"><br><br><div class="gmail_quote">On 4 December 2013 11:46, Peter Steinbach <span dir="ltr">&lt;<a href="mailto:lists@telefaks.de" target="_blank">lists@telefaks.de</a>&gt;</span> wrote:<br>


<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  
    
  
  <div bgcolor="#FFFFFF" text="#000000">
    <div>Hello Andrew,<br>
      <br>
      if you manage your SIP registrations via xml_curl instead of a
      static dialplan, you have the variable &quot;sip_user_agent&quot; (e.g.
      sip_user_agent=Aastra%206739i/3.2.2.2044) available in the params,
      and then you can restrict the registrations based on the content
      in this variable.<br>
      <br>
      <br>
      Best regards<br>
      Peter<div><div><br>
      <br>
      <br>
      On 12/04/13 10:33, Andrew Cassidy wrote:<br>
    </div></div></div><div><div>
    <blockquote type="cite">
      <div dir="ltr">IPtables string matching is probably the easiest
        way (assuming no tls on these clients)
        <div><br>
        </div>
        <div><a href="http://www.netfilter.org/documentation/HOWTO/netfilter-extensions-HOWTO-3.html#ss3.18" target="_blank">http://www.netfilter.org/documentation/HOWTO/netfilter-extensions-HOWTO-3.html#ss3.18</a></div>



      </div>
      <div class="gmail_extra"><br>
        <br>
        <div class="gmail_quote">On 4 December 2013 07:52, mehroz <span dir="ltr">&lt;<a href="mailto:mehroz.ashraf85@gmail.com" target="_blank">mehroz.ashraf85@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">Hi All,<br>
            <br>
            We already know that we can allow/deny a SIP end point to
            get registered to<br>
            FreeSWITCH on the basis of IP , but what about if we want it
            to filter<br>
            &quot;User-Agent&quot; field in REGISTER packets to be the key for
            registration.<br>
            <br>
            Since , we can also use TLS based registration but some soft
            phones does not<br>
            have that capability. In that case , is there any way of
            passing only<br>
            specified USER AGENT SIP client?<br>
            <br>
            Thanks<br>
            <br>
            <br>
            <br>
            --<br>
            View this message in context: <a href="http://freeswitch-users.2379917.n2.nabble.com/Restrict-SIP-registration-tp7596017.html" target="_blank">http://freeswitch-users.2379917.n2.nabble.com/Restrict-SIP-registration-tp7596017.html</a><br>



            Sent from the freeswitch-users mailing list archive at
            Nabble.com.<br>
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          </blockquote>
        </div>
        <br>
        <br clear="all">
        <div><br>
        </div>
        -- <br>
        <b>Andrew Cassidy BSc (Hons) MBCS SSCA</b>
        <div>Managing Director
          <div>
            <div><img><br>
            </div>
            <div><br>
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              <div><b style="text-decoration:none;font-family:sans-serif"><a href="mailto:info@cassidywebservices.co.uk" style="color:rgb(51,135,171);text-decoration:none;font-family:sans-serif" target="_blank">E</a> </b><a href="mailto:andrew@cassidywebservices.co.uk" target="_blank">andrew@cassidywebservices.co.uk</a></div>



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            </div>
          </div>
        </div>
      </div>
      <br>
      <fieldset></fieldset>
      <br>
      <pre>_________________________________________________________________________
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</pre>
    </blockquote>
    <br>
    <br>
    </div></div><span><font color="#888888"><pre cols="72">-- 
With kind regards
Peter Steinbach 

Telefaks Services GmbH
<a href="mailto:lists" target="_blank">mailto:lists</a> (att) <a href="http://telefaks.de" target="_blank">telefaks.de</a>
Internet: <a href="http://www.telefaks.de" target="_blank">www.telefaks.de</a>

</pre>
  </font></span></div>

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<br></blockquote></div><br></div>
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<br></blockquote></div>