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    <font face="Calibri">Ok, I will try it and keep you informed.<br>
      <br>
      Thanks,<br>
      A.<br>
    </font><br>
    On 01/09/2010 20:47, Gianluca Varenni wrote:
    <blockquote cite="mid:311C163CA8E54DD682B2B1716FE7BA99@NELSON3"
      type="cite">
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      <div><font face="Calibri">I would definitely try using a WinPcap
          based application. I wonder if the TCP/IP stack in Windows 7
          drops a packet with a TTL = 0.</font></div>
      <div>&nbsp;</div>
      <div><font face="Calibri">Have a nice day</font></div>
      <div><font face="Calibri">GV</font></div>
      <div><br>
      </div>
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        <div style="background: none repeat scroll 0% 0% rgb(245, 245,
          245);">
          <div style=""><b>From:</b> <a moz-do-not-send="true"
              title="alberto.avanzi@keeneo.com"
              href="mailto:alberto.avanzi@keeneo.com">Alberto Avanzi</a>
          </div>
          <div><b>Sent:</b> Wednesday, September 01, 2010 8:49 AM</div>
          <div><b>To:</b> <a moz-do-not-send="true"
              title="winpcap-users@winpcap.org"
              href="mailto:winpcap-users@winpcap.org">winpcap-users@winpcap.org</a>
          </div>
          <div><b>Subject:</b> Re: [Winpcap-users] Multicast packets
            with TTL=0 reception problem under Windows Seven</div>
        </div>
      </div>
      <div><br>
      </div>
      <font face="Calibri">Hi Gianluca,<br>
        <br>
        thanks for your reply.<br>
        <br>
        No, they are sent by a standard WinSock-based application.<br>
        If it matters, we could move to a WinPCap-based sender...<br>
        <br>
        Best regards,<br>
        Alberto.<br>
      </font><br>
      On 01/09/2010 17:46, Gianluca Varenni wrote:
      <blockquote cite="mid:1D6D78E4A8054A99992FA9F0A4E2BE49@NELSON3"
        type="cite">
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        <div><font face="Calibri">Is the packet sent by another
            WinPcap-based application?</font></div>
        <div>&nbsp;</div>
        <div><font face="Calibri">Have a nice day</font></div>
        <div><font face="Calibri">GV</font></div>
        <div style="font: 10pt Tahoma;">
          <div><br>
          </div>
          <div style="background: none repeat scroll 0% 0% rgb(245, 245,
            245);">
            <div><b>From:</b> <a title="alberto.avanzi@keeneo.com"
                href="mailto:alberto.avanzi@keeneo.com"
                moz-do-not-send="true">Alberto Avanzi</a> </div>
            <div><b>Sent:</b> Wednesday, September 01, 2010 2:55 AM</div>
            <div><b>To:</b> <a title="winpcap-users@winpcap.org"
                href="mailto:winpcap-users@winpcap.org"
                moz-do-not-send="true">winpcap-users@winpcap.org</a> </div>
            <div><b>Subject:</b> Re: [Winpcap-users] Multicast packets
              with TTL=0 reception problem under Windows Seven</div>
          </div>
        </div>
        <div><br>
        </div>
        <font face="Calibri">Just to confirm that it doesn't come from
          our (receiving) code (from our sending code maybe ?):<br>
          <br>
          even the WinPCap 4.1.2 "UDPDump" provided example fails to
          retrieve these packets.<br>
          <br>
          A.<br>
        </font><br>
        On 01/09/2010 11:09, Alberto Avanzi wrote:
        <blockquote cite="mid:4C7E1856.3010805@keeneo.com" type="cite"><font
            face="Calibri">Hi,<br>
            <br>
            our multicast-receiving application is based, since some
            years, on WinPCap.<br>
            <br>
            We use it under Windows XP and Windows Server 2003, and it
            works well for receiving multicast<br>
            packets independently from their TTL (0, 1 or 2) (with
            WinPCap 4.0.2).<br>
            <br>
            The same application running on Seven (with WinPCap 4.1.2)
            is unable to receive packets with TTL = 0<br>
            (sent by another application on the same machine). It is
            clearly a reception problem, because if we use<br>
            standard socket code for receiving packets, we get them.<br>
            If we set the TTL=1, we receive the packets.<br>
            <br>
            Any idea ?<br>
            Should we modify something in our code in order to get them
            again ?<br>
            <br>
            Thanks a lot,<br>
            Alberto.<br>
            <br>
            <br>
          </font>
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