<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=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
/* Font Definitions */
@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:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-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;}
span.EmailStyle17
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.EmailStyle18
{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:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
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-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Yesterday a customer of ours reported they couldn’t get to <b>mypay.dfas.mil</b>. Upon looking into it I see both of my Unbound servers are returning SERVFAIL. Given the type of sight this is I suspected this to be a possible DNSSEC issue. I verified there’s an issue here:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><a href="http://dnsviz.net/d/dfas.mil/dnssec/">http://dnsviz.net/d/dfas.mil/dnssec/</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>•dfas.mil/DNSKEY:This RRset is not covered by any RRSIG.<o:p></o:p></p><p class=MsoNormal>•dfas.mil/MX:DNSKEYs exist for algorithm(s) 8, 7 in the dfas.mil zone, but the dfas.mil/MX RRset was not signed by any DNSKEY with algorithm(s) 7.<o:p></o:p></p><p class=MsoNormal>•dfas.mil/SOA:DNSKEYs exist for algorithm(s) 8, 7 in the dfas.mil zone, but the dfas.mil/SOA RRset was not signed by any DNSKEY with algorithm(s) 7.<o:p></o:p></p><p class=MsoNormal>•dfas.mil/TXT:DNSKEYs exist for algorithm(s) 8, 7 in the dfas.mil zone, but the dfas.mil/TXT RRset was not signed by any DNSKEY with algorithm(s) 7.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I tested resolution against both DNS-OARC’s BIND and Unbound DNSSEC public servers:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>BIND 9 149.20.64.20 2001:4f8:3:2bc:1::64:20 <o:p></o:p></p><p class=MsoNormal>Unbound 149.20.64.21 2001:4f8:3:2bc:1::64:21<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Their Unbound server fails just as mine do, but their BIND server returns the A record. I’m reluctant to disable DNSSEC validation over this one domain, considering there appears to be an actual problem. Considering BIND as well as Google’s public DNS are validating this site OK I figured it was worth bringing up.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Any feedback is appreciated!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>/ehren<o:p></o:p></p></div></body></html>