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    hi,<br>
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    you can do it using iptables:<br>
    <br>
    <code class="xml plain">iptables -I INPUT -j DROP -p udp --dport
      5060 -m string --string "zoiper" --algo bm<br>
      <br>
      <br>
      source:<br>
      <a class="moz-txt-link-freetext" href="https://freeswitch.org/confluence/display/FREESWITCH/Security">https://freeswitch.org/confluence/display/FREESWITCH/Security</a><br>
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    </code><br>
    <div class="moz-cite-prefix">On 02/24/2017 09:26 AM, Lợi Đặng wrote:<br>
    </div>
    <blockquote
cite="mid:CAGsrq_v=tEYQ3yEjnB7LjFax2=jNf4tE459sMAPkRKRfaN1E6g@mail.gmail.com"
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            <div>Hi list, I have a list of user agent regex pattern. For
              example:<br>
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            ^Asterisk PBX<br>
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          ^Zoiper<br>
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        ^SipP$<br>
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              <div>The list will have more and more members by time.<br>
              </div>
              <div>All I want is to reject all the SIP messages (not
                only INVITE) that has User-Agent header value match any
                of the pattern in the list. How can I do that?<br>
                <br>
              </div>
              <div>I know this can be achieved with a sip proxy placed
                before FreeSwitch, but I don't want an additional SIP
                component for just that.<br>
              </div>
              <div><br>
              </div>
              <div>Any help would be appreciated.<br>
              </div>
              <div>rgds,<br clear="all">
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                                <div>Loi Dang Thanh<br>
                                </div>
                                Phone : +84. 1224.735.448<br>
                              </div>
                              Email : <a moz-do-not-send="true"
                                href="mailto:loi.dangthanh@gmail.com"
                                target="_blank">loi.dangthanh@gmail.com</a><br>
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      <pre wrap="">_________________________________________________________________________
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