<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:Helvetica;
panose-1:2 11 6 4 2 2 2 2 2 4;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman",serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.msonormal0, li.msonormal0, div.msonormal0
{mso-style-name:msonormal;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Times New Roman",serif;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-GB" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">I’ve seen this BGP withdrawal cited in a number of places.<br>
<br>
However we peer with FB, and all four sessions are up and have been live for days/months (FB had maintenance on one peering router a couple of weeks ago) and all 30 prefixes are consistent and announced.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">The NS IP’s are in the announcements, but you can’t ICMP to them, or query them as NS for the auth records either..<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:navy">Peter Knapp</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Outages [mailto:outages-bounces@outages.org]
<b>On Behalf Of </b>Rich Lafferty via Outages<br>
<b>Sent:</b> 04 October 2021 17:27<br>
<b>To:</b> Outages mailing list <outages@outages.org><br>
<b>Subject:</b> Re: [outages] Facebook.com no records?<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div name="messageBodySection">
<div>
<p class="MsoNormal">A carrier networking engineer friend of mine observed that the network that those DNS servers live in is no longer in the global routing table. Sounds like BGP issues rather than DNS ones, I guess. (I won’t admit to understanding BGP.)<br>
<br>
-Rich <o:p></o:p></p>
</div>
</div>
<div name="messageSignatureSection">
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal"><strong><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:#212121">Rich Lafferty</span></strong><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:#212121"> </span><span style="font-size:7.5pt"><br>
</span><a href="mailto:rich@lafferty.ca" target="_blank"><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:#477CCC">rich@lafferty.ca</span></a><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:#212121"> / 647-377-1165</span><span style="font-size:7.5pt"><br>
</span><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:#212121">Toronto, Canada</span><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:black"> </span><span style="font-size:7.5pt"><br>
</span><a href="http://www.lafferty.ca" target="_blank"><span style="font-size:7.5pt;font-family:"Helvetica",sans-serif;color:#477CCC">http://www.lafferty.ca</span></a><br>
<span style="font-size:7.5pt"><br>
</span><a href="https://twitter.com/mendel" target="_blank"><span style="text-decoration:none"><img border="0" width="16" id="_x0000_i1025" src="https://s3.amazonaws.com/htmlsig-assets/round/twitter.png"></span></a><a href="https://twitter.com/mendel" target="_blank"><span style="font-size:1.0pt;font-family:"Helvetica",sans-serif;color:black"> </span></a><img border="0" width="2" id="_x0000_i1026" src="https://s3.amazonaws.com/htmlsig-assets/spacer.gif"><span style="font-size:1.0pt;font-family:"Helvetica",sans-serif;color:black"> </span><a href="https://facebook.com/richlafferty" target="_blank"><span style="text-decoration:none"><img border="0" width="16" id="_x0000_i1027" src="https://s3.amazonaws.com/htmlsig-assets/round/facebook.png"></span></a><a href="https://facebook.com/richlafferty" target="_blank"><span style="font-size:1.0pt;font-family:"Helvetica",sans-serif;color:black"> </span></a><img border="0" width="2" id="_x0000_i1028" src="https://s3.amazonaws.com/htmlsig-assets/spacer.gif"><span style="font-size:1.0pt;font-family:"Helvetica",sans-serif;color:black"> </span><a href="https://linkedin.com/in/richlafferty" target="_blank"><span style="text-decoration:none"><img border="0" width="16" id="_x0000_i1029" src="https://s3.amazonaws.com/htmlsig-assets/round/linkedin.png"></span></a><a href="https://linkedin.com/in/richlafferty" target="_blank"><span style="font-size:1.0pt;font-family:"Helvetica",sans-serif;color:black"> </span></a><img border="0" width="2" id="_x0000_i1030" src="https://s3.amazonaws.com/htmlsig-assets/spacer.gif"><span style="font-size:1.0pt;font-family:"Helvetica",sans-serif;color:black"> </span><a href="https://instagram.com/wlonkly" target="_blank"><span style="text-decoration:none"><img border="0" width="16" id="_x0000_i1031" src="https://s3.amazonaws.com/htmlsig-assets/round/instagram.png"></span></a><a href="https://instagram.com/wlonkly" target="_blank"><span style="font-size:1.0pt;font-family:"Helvetica",sans-serif;color:black"> </span></a><img border="0" width="2" id="_x0000_i1032" src="https://s3.amazonaws.com/htmlsig-assets/spacer.gif"><span style="font-size:1.0pt;font-family:"Helvetica",sans-serif;color:black"> </span><a href="https://www.flickr.com/photos/mendel" target="_blank"><span style="text-decoration:none"><img border="0" width="16" id="_x0000_i1033" src="https://s3.amazonaws.com/htmlsig-assets/round/flickr.png"></span></a><a href="https://www.flickr.com/photos/mendel" target="_blank"><span style="font-size:1.0pt;font-family:"Helvetica",sans-serif;color:black"> </span></a><img border="0" width="2" id="_x0000_i1034" src="https://s3.amazonaws.com/htmlsig-assets/spacer.gif"><span style="font-size:1.0pt;font-family:"Helvetica",sans-serif;color:black"> </span><a href="https://github.com/wlonkly" target="_blank"><span style="text-decoration:none"><img border="0" width="16" id="_x0000_i1035" src="https://s3.amazonaws.com/htmlsig-assets/round/github.png"></span></a><a href="https://github.com/wlonkly" target="_blank"><span style="font-size:1.0pt;font-family:"Helvetica",sans-serif;color:black"> </span></a><img border="0" width="2" id="_x0000_i1036" src="https://s3.amazonaws.com/htmlsig-assets/spacer.gif"><span style="font-size:1.0pt;font-family:"Helvetica",sans-serif;color:black"> </span><a href="https://mendel.tumblr.com" target="_blank"><span style="text-decoration:none"><img border="0" width="16" id="_x0000_i1037" src="https://s3.amazonaws.com/htmlsig-assets/round/tumblr.png"></span></a><a href="https://mendel.tumblr.com" target="_blank"><span style="font-size:1.0pt;font-family:"Helvetica",sans-serif;color:black"> </span></a><img border="0" width="2" id="_x0000_i1038" src="https://s3.amazonaws.com/htmlsig-assets/spacer.gif"><o:p></o:p></p>
</div>
</div>
<div name="messageReplySection">
<p class="MsoNormal">On Oct 4, 2021, 1:14 PM -0300, Jon Sands via Outages <<a href="mailto:outages@outages.org">outages@outages.org</a>>, wrote:<br>
<br>
<o:p></o:p></p>
<blockquote style="border:none;border-left:solid windowtext 1.0pt;padding:0cm 0cm 0cm 8.0pt;margin-left:3.75pt;margin-top:3.75pt;margin-right:3.75pt;margin-bottom:3.75pt">
<p class="MsoNormal">Seems the facebook.com domain no longer has any DNS records? Getting<br>
nxdomain from most clients, same when digging @ 1.1.1.1 8.8.8.8 etc<br>
<br>
<a href="https://toolbox.googleapps.com/apps/dig/#A/facebook.com">https://toolbox.googleapps.com/apps/dig/#A/facebook.com</a><br>
<br>
--<br>
Jon Sands<br>
MFI Labs<br>
<a href="https://fohdeesha.com/">https://fohdeesha.com/</a><br>
<br>
_______________________________________________<br>
Outages mailing list<br>
<a href="mailto:Outages@outages.org">Outages@outages.org</a><br>
<a href="https://puck.nether.net/mailman/listinfo/outages">https://puck.nether.net/mailman/listinfo/outages</a><o:p></o:p></p>
</blockquote>
</div>
</div>
</body>
</html>