Question about swupdl.adobe.com

[Giles Coochey]

On 09/10/2014 12:24, IDS Submit wrote:
>
> Good morning,
>
> I have BIND 9.10.1 x86 and I have error on query swupdl.adobe.com
>
> ------------------------------------------------------------------
>
> > swupdl.adobe.com
>
> Server: dns1.ids.it
>
> Address: 81.174.15.142
>
> *** dns1.ids.it non è in grado di trovare swupdl.adobe.com: 
> Non-existent domain
>
> ------------------------------------------------------------------
>
See below...
>
> ;; ANSWER SECTION:
>
> swupdl.adobe.com. 5274    IN      CNAME   swupdl.wip4.adobe.com.
>
> swupdl.wip4.adobe.com. 67      IN      CNAME   
> swupdl.adobe.com.edgesuite.net.
>
> swupdl.adobe.com.edgesuite.net. 794 IN  CNAME   a1577.d.akamai.net.
>
> a1577.d.akamai.net. 19      IN      A       2.18.240.203
>
> a1577.d.akamai.net. 19      IN      A       2.18.240.210
>
>
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).

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.

Thanks

-- 
Regards,

Giles Coochey, CCNP, CCNA, CCNAS
NetSecSpec Ltd
+44 (0) 8444 780677
+44 (0) 7584 634135
http://www.coochey.net
http://www.netsecspec.co.uk
giles at coochey.net

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