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[banjonz]

I am using an HE tunnel and have had the same IPV6 prefix for a number of years. Three weeks ago Google Search started failing for all the boxes on my LAN, all browsers, with:

403. That’s an error.
Your client does not have permission to get URL /search?client=firefox-b-d&q=google+search+fails from this server. That’s all we know.

With IPV6 disabled there is no issue.

I guess that for some reason my prefix has been black listed by Google, although I have no idea what might have caused it. Has anyone else had a similar problem and if so what was the resolution?

Thank you

[snarked]

Google has locked out your IPv6 address for perceived abuse.  I’ve had that happen also.  It thinks your queries are automated, even if/when they’re not.

[banjonz]

Yes - I thought that was probably the case.I've been unable to find any way of contacting google about the issue, so for now I have disabled IPv6 on this machine.

I suppose another option is to remove the IPv6 tunnel, request another and hope for a different prefix. Bit of a pain to renumber my LAN and fix DNS but it is doable.

[jimzhong]

This also happened to me today. I created a new tunnel, but still got blocked by Google search. My workaround is to configure my router to reject all ipv6 http(s) traffic to Google's IPv6 blocks.