<div dir="ltr">Thank you very much, Billy. <br><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Aug 13, 2014 at 7:51 PM, Billy Glynn <span dir="ltr"><<a href="mailto:billy.glynn@iedr.ie" target="_blank">billy.glynn@iedr.ie</a>></span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div>On 13 Aug 2014, at 02:13, Davey Song <<a href="mailto:songlinjian@gmail.com" target="_blank">songlinjian@gmail.com</a>> wrote:<br>


<br>
> My question is that I heard that EDNS0 does not work well because the misbehavior of mid-box like firewall or IPS which degrade the function of EDNS0. I wondering if there is any measurement report or statistic which support this point and show how severe it is.<br>


<br>
</div>Ray Bellis' work from 2008 may guide you:<br>
<br>
<a href="https://www.icann.org/en/system/files/files/sac-035-en.pdf" target="_blank">https://www.icann.org/en/system/files/files/sac-035-en.pdf</a><br>
<span><font color="#888888"><br>
Billy<br>
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