The nameservers for securityplusfcuhb.flb.intuit.com are broken. dig securityplusfcuhb.flb.intuit.com @flbflb-gtm-qydc.intuit.com ns -> NXDOMAIN dig securityplusfcuhb.flb.intuit.com @flbflb-gtm-qydc.intuit.com a -> CNAME dig securityplusfcuhb.flb.intuit.com @flbflb-gtm-qydc.intuit.com aaaa -> NODATA dig securityplusfcuhb.flb.intuit.com @flbflb-gtm-qydc.intuit.com cname -> NXDOMAIN
A properly functioning, RFC 1034 [1] compliant, nameserver will return CNAME to all these queries as there is a CNAME record in the zone at that name. intuit.com need to complain to their nameserver vendor to get it fixed. They also need to complain that the EDNS handling [2] is broken as they the servers fail to correctly handle EDNS versions other than 0 and they fail to correctly handle unknown EDNS options. dig securityplusfcuhb.flb.intuit.com @flbflb-gtm-qydc.intuit.com a +edns=1 -> fails to respond. The correct answer is BADVERS. dig securityplusfcuhb.flb.intuit.com @flbflb-gtm-qydc.intuit.com a +ednsopt=200 -> incorrectly returns unknown EDNS options. Mark [1] http://tools.ietf.org/html/rfc1034 [2] http://tools.ietf.org/html/rfc6891 In message <f80b214c2304c641b917b47051d743c4201b6cc...@hq-mb-08.ba.ad.ssa.gov>, "Tracy, Tedd C. Contractor" writes: > > I'm having problems querying one particular domain with BIND 9.10.0-P2 if p= > refetch is enabled. I have been able to duplicate the problem from multiple= > servers running 9.10.0-P2 with different operating systems but I have not = > been able to duplicate the problem with any other domains (yet, I'm still t= > rying), > > The domain that shows the problem is www.securityplusfcuhb.org<http://www.s= > ecurityplusfcuhb.org>. It is a CNAME that points to a CNAME that points to = > an A record: > ;; QUESTION SECTION: > ;www.securityplusfcuhb.org. IN A > > ;; ANSWER SECTION: > www.securityplusfcuhb.org. 86399 IN CNAME securityplusfcuhb.flb.intui= > t.com. > securityplusfcuhb.flb.intuit.com. 30 IN CNAME 03845.olb.prd1.flb.digitali= > nsight.com. > 03845.olb.prd1.flb.digitalinsight.com. 30 IN A 199.102.151.76 > > As long as no queries are performed at a time that would trigger a prefetch= > , everything is fine. If a query is performed at a time that does trigger a= > prefetch, all subsequent queries return NXDOMAIN. > dig @localhost a www.securityplusfcuhb.org > > ; <<>> DiG 9.10.0-P2 <<>> @localhost a www.securityplusfcuhb.org > ; (2 servers found) > ;; global options: +cmd > ;; Got answer: > ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 49996 > ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1 > > ;; OPT PSEUDOSECTION: > ; EDNS: version: 0, flags:; udp: 4096 > ;; QUESTION SECTION: > ;www.securityplusfcuhb.org. IN A > > ;; ANSWER SECTION: > www.securityplusfcuhb.org. 86187 IN CNAME securityplusfcuhb.flb.intui= > t.com. > > ;; AUTHORITY SECTION: > flb.intuit.com. 597 IN SOA flbflb-gtm-qydc.intuit.com.= > hostmaster.flb.intuit.com. 2014022110 10800 3600 604800 86400 > > Flushing the cache fixes the problem. Disabling prefetch prevents the probl= > em from happening. > > > Tedd > > --_000_F80B214C2304C641B917B47051D743C4201B6CCDE4HQMB08baadssa_ > Content-Type: text/html; charset="us-ascii" > Content-Transfer-Encoding: quoted-printable > > <html xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:o=3D"urn:schemas-micr= > osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" = > xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" xmlns=3D"http:= > //www.w3.org/TR/REC-html40"><head><meta http-equiv=3DContent-Type content= > =3D"text/html; charset=3Dus-ascii"><meta name=3DGenerator content=3D"Micros= > oft 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-compose; > font-family:"Calibri","sans-serif"; > color:windowtext;} > .MsoChpDefault > {mso-style-type:export-only; > font-family:"Calibri","sans-serif";} > @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=3D"edit" spidmax=3D"1026" /> > </xml><![endif]--><!--[if gte mso 9]><xml> > <o:shapelayout v:ext=3D"edit"> > <o:idmap v:ext=3D"edit" data=3D"1" /> > </o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue vli= > nk=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal>I’m having= > problems querying one particular domain with BIND 9.10.0-P2 if prefetch is= > enabled. I have been able to duplicate the problem from multiple servers r= > unning 9.10.0-P2 with different operating systems but I have not been able = > to duplicate the problem with any other domains (yet, I’m still tryin= > g), <o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMso= > Normal>The domain that shows the problem is <a href=3D"http://www.securityp= > lusfcuhb.org">www.securityplusfcuhb.org</a>. It is a CNAME that points to a= > CNAME that points to an A record:<o:p></o:p></p><p class=3DMsoNormal>;; QU= > ESTION SECTION:<o:p></o:p></p><p class=3DMsoNormal>;www.securityplusfcuhb.o= > rg. IN A<o:p></o:p></= > p><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>;; ANSWER = > SECTION:<o:p></o:p></p><p class=3DMsoNormal>www.securityplusfcuhb.org. 8639= > 9 IN CNAME securityplusfcuhb.flb.intuit= > .com.<o:p></o:p></p><p class=3DMsoNormal>securityplusfcuhb.flb.intuit.com. = > 30 IN CNAME 03845.olb.prd1.flb.digitalinsight.com.<o:p></o:p></= > p><p class=3DMsoNormal>03845.olb.prd1.flb.digitalinsight.com. 30 IN A = > 199.102.151.76<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p = > class=3DMsoNormal>As long as no queries are performed at a time that would = > trigger a prefetch, everything is fine. If a query is performed at a time t= > hat does trigger a prefetch, all subsequent queries return NXDOMAIN.<o:p></= > o:p></p><p class=3DMsoNormal>dig @localhost a www.securityplusfcuhb.org<o:p= > ></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>;= > <<>> DiG 9.10.0-P2 <<>> @localhost a www.securityp= > lusfcuhb.org<o:p></o:p></p><p class=3DMsoNormal>; (2 servers found)<o:p></o= > :p></p><p class=3DMsoNormal>;; global options: +cmd<o:p></o:p></p><p class= > =3DMsoNormal>;; Got answer:<o:p></o:p></p><p class=3DMsoNormal>;; ->>= > HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 49996<o:p></o:p></p><p= > class=3DMsoNormal>;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, A= > DDITIONAL: 1<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p cla= > ss=3DMsoNormal>;; OPT PSEUDOSECTION:<o:p></o:p></p><p class=3DMsoNormal>; E= > DNS: version: 0, flags:; udp: 4096<o:p></o:p></p><p class=3DMsoNormal>;; QU= > ESTION SECTION:<o:p></o:p></p><p class=3DMsoNormal>;www.securityplusfcuhb.o= > rg. IN A<o:p></o:p></= > p><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>;; ANSWER = > SECTION:<o:p></o:p></p><p class=3DMsoNormal>www.securityplusfcuhb.org. 8618= > 7 IN CNAME securityplusfcuhb.flb.intuit= > .com.<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMs= > oNormal>;; AUTHORITY SECTION:<o:p></o:p></p><p class=3DMsoNormal>flb.intuit= > .com. 597 = > IN SOA flbflb-= > gtm-qydc.intuit.com. hostmaster.flb.intuit.com. 2014022110 10800 3600 60480= > 0 86400<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p class=3D= > MsoNormal>Flushing the cache fixes the problem. Disabling prefetch prevents= > the problem from happening. <o:p></o:p></p><p class=3DMsoNormal><o:p> = > ;</o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal><= > b><span style=3D'color:#1F497D'>Tedd </span></b><o:p></o:p></p></div></body= > ></html>= > > --_000_F80B214C2304C641B917B47051D743C4201B6CCDE4HQMB08baadssa_-- > > --===============2013608274312288261== > Content-Type: text/plain; charset="us-ascii" > MIME-Version: 1.0 > Content-Transfer-Encoding: 7bit > Content-Disposition: inline > > _______________________________________________ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe > from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users > --===============2013608274312288261==-- -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users