[Netalyzr] DNS redirected to third-part​y servers: www.google​.com

Nicholas Weaver nweaver at ICSI.Berkeley.EDU
Thu Jun 14 11:32:35 PDT 2012

I think this may be a false positive:

The systems respond like standard Google servers, both in normal communication and in errors (previous situations where this occured had the servers respond differently to errors than legitimate Google servers).  So it could be Google has added some new servers in Poland, but not updated the reverse DNS.  I will contact a friend at google to confirm...

However, if you want to be extra sure, you can switch to Google Public DNS ( and

On Jun 14, 2012, at 11:26 AM, Maciej Soltysiak wrote:

> Hi,
> My netalyzr runs recently start to show that my ISP redirects www.google.com to 3rd party.
> I would like to make sure it's me or my ISP and not something changed in google CDN or Netalyzr so could anyone else verify if you are getting similar results, please?
> My run is here:
> http://n1.netalyzr.icsi.berkeley.edu/summary/id=43ca253f-21386-3947730d-5148-4bce-9140#DNSLookup
> The IPs that get resolved are:
> Possible reasons:
> - DNS issues on my home router, which has a bit experimental software (cerowrt from bufferbloat.net), but it didn't show before on same firmware.
> - Ongoing cache poisoning attack. My ISP DNS is
> - this might be if google is using another pool for CDN then it's a false positive. -- I'm located in Poznan, Poland, (Europe)
> Best regards,
> Maciej Soltysiak
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