Hi Nikolay, The "popular open dns services" you refer to appear to be Proxy/VPN services that also provide DNS to get around region blocking. These services proxy and/or NAT users behind a single IP address to make it look like you are coming from a different country.
I may be biased, but when I think of popular open DNS services I think of OpenDNS or Google DNS, and you should *never* see a captcha as a result of using OpenDNS. Disclaimer: I work for OpenDNS, and while I can't speak to Google DNS, I have never heard of this behaviour with their service either. Just wanted to clarify. - Chris On Tue, Nov 10, 2015 at 12:29 PM, Nikolay Shopik <sho...@inblock.ru> wrote: > When I've started using DNS from unotelly service, captcha starts > appears from time to time. If I change DNS to something else, catcha > gone immediately. > > Its probably related to DNS geo-locating to decide what records serve to > client > > On 10/11/2015 23:00, Christopher Morrow wrote: >> On Tue, Nov 10, 2015 at 1:09 PM, Nikolay Shopik <sho...@inblock.ru> wrote: >>> You may get captcha if you are using popular open dns services. At least >>> this is what I've seen. >>> >> >> pardon, what? >> >>> On 10/11/2015 20:28, Joseph Jenkins wrote: >>>> We started getting a Google Captcha for our web searches this morning. >>>> Does anyone have contact info for Google so that I can contact them and >>>> figure out where the traffic is coming from on my side or what service it >>>> is going to so that I can track down the users? >>>> >>>> Thanks, >>>> >>>> Joe Jenkins >>>> 909.636.2097 >>>>
