[AusNOG] Google DNS Blocking/Unblocking

[Paul Julian]

Thanks Angelo, tried that link, unfortunately it didn’t help.
 
We haven’t received any notification to our admin address for our IP range, nothing at all, just one day it stopped working and we don’t know why, we have a couple of customers who were using Google DNS who now can’t which they aren’t happy about, it doesn’t affect most customers as they use our DNS servers but we just find it strange that we seem to be blocked.
 
Regards
Paul
 
From: Angelo Giuffrida [mailto:angelo.giuffrida at gmail.com] 
Sent: Monday, 19 January 2015 7:16 PM
To: Beeson, Ayden
Cc: Paul Julian; ausnog at lists.ausnog.net
Subject: Re: [AusNOG] Google DNS Blocking/Unblocking
 
Try accessing this from the IP address that you suspect is blacklisted - http://ipv4.google.com/sorry/ - and it should clear any automated block that exists for that IP address.
On 19 Jan 2015 7:01 pm, "Beeson, Ayden" <ABeeson at csu.edu.au> wrote:
I would have assumed if you were blocked by some sort of automatic process due to some form of attack you would get an abuse email from the same automatic system, have you checked your dns admin / ip admin emails for that?

It might tell you how to get it fixed if that is the reason...

On 19 Jan 2015 17:25, Paul Julian <paul at oxygennetworks.com.au> wrote:
We have noticed recently that some customers are complaining about not being able to resolve DNS via Google’s DNS servers, upon further investigation we have found that we seem to be getting blocked by Google from pinging or resolving DNS queries to their public servers, does anybody know if there is some way we can check what the issue might be ?

I have searched the net looking for information about finding out if your address ranges is blocked by them or anything like that but can’t seem to find anything at all.

The only plausible thing I can think of is that one of our customers has had a Trojan or some problem and been hitting Google’s servers and they have blocked our range or something.

We don’t do any blocking like that within our network nor do our upstream providers so I know it’s nothing there which is causing the problem, a trace route stops responding well outside our network as well.

I would appreciate any suggestions on where I might look for some answers for this as I can’t find anything in Google’s pages anywhere nor anything via searches.

Thanks
Paul

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