[outages] Google Resolver 8.8.8.8 Selectively responding to RDNS requests

[Scott Berkman]

Check out this page and the link from there to the Google Public DNS 
User Group or the Issue Tracker for reporting issues:

https://developers.google.com/speed/public-dns/docs/using?csw=1#troubleshooting

Hope that helps,

   -Scott



On 05/23/2014 03:31 AM, Blake McKeeby wrote:
> I have a /24 in an Internap colo and use Google Resolver 8.8.8.8 on all my machines. Google will not consistently respond to RDNS lookups from source IP X.X.X.1 but will respond consistently if I change the IP address of the machine to X.X.X.2. I have proven the DNS response is never returned using tcpdump.
> It's positively not a local networking issue as changing my resolver to 4.2.2.2 (Level 3) while the machine uses X.X.X.1, the RDNS responses arrive without fail.
>
> Has anyone else seen this sort of selective response by Google? Do they maintain some sort of black list?
>
>
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