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<div class="moz-cite-prefix">On 09/10/2014 12:24, IDS Submit wrote:<br>
</div>
<blockquote cite="mid:000001cfe3b3$a0d29480$e277bd80$@ids.it"
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<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New"">Good
morning,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New"">I
have BIND 9.10.1 x86 and I have error on query
swupdl.adobe.com<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New"">------------------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New"">>
swupdl.adobe.com<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New"">Server:
dns1.ids.it<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New"">Address:
81.174.15.142<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New"">***
dns1.ids.it non č in grado di trovare swupdl.adobe.com: <span
style="background:yellow;mso-highlight:yellow">Non-existent
domain</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New"">------------------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
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</blockquote>
See below...<span style="font-size:10.0pt;font-family:"Courier
New""><o:p> <br>
</o:p></span>
<blockquote cite="mid:000001cfe3b3$a0d29480$e277bd80$@ids.it"
type="cite">
<div class="WordSection1">
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New"">;;
ANSWER SECTION:<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New"">swupdl.adobe.com.
5274 IN CNAME swupdl.wip4.adobe.com.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New"">swupdl.wip4.adobe.com.
67 IN CNAME swupdl.adobe.com.edgesuite.net.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New"">swupdl.adobe.com.edgesuite.net.
794 IN CNAME a1577.d.akamai.net.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New"">a1577.d.akamai.net.
19 IN A 2.18.240.203<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New"">a1577.d.akamai.net.
19 IN A 2.18.240.210<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span><br>
</p>
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</blockquote>
It looks like adobe are entertaining use of a CNAME chain (a CNAME
to a CNAME which points to a CNAME which points to a CNAME which
eventually points to an A record).<br>
<br>
I expect that the upstream server to dns1.ids.it doesn't implement
this level of recursion and as such doesn't return the full details.<br>
<br>
Thanks<br>
<br>
<pre class="moz-signature" cols="72">--
Regards,
Giles Coochey, CCNP, CCNA, CCNAS
NetSecSpec Ltd
+44 (0) 8444 780677
+44 (0) 7584 634135
<a class="moz-txt-link-freetext" href="http://www.coochey.net">http://www.coochey.net</a>
<a class="moz-txt-link-freetext" href="http://www.netsecspec.co.uk">http://www.netsecspec.co.uk</a>
<a class="moz-txt-link-abbreviated" href="mailto:giles@coochey.net">giles@coochey.net</a>
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