Chaining with consensus could lead to unpredictable results about php-dns HOT 2 OPEN

This is interesting. I'll have some time to look into it tomorrow evening and will give you an update. My gut feeling is the equality check is too strict but it's been a while and I need to refresh how the this thing works hehe.

from php-dns.

Hi, well I have the feeling that there is something special going on with google.com as when querying it, it only returns one record, but the record changes every lookup and the returned IP addresses range seems to be dependent from where you are querying it, so there will never be a possible consensus between CloudFlare and Google DNS servers.

I did the same test with a domain name which is using CloudFlare DNS servers as authoritative servers and the result is the same as for google.com.
It doesn't return the same IP addresses if I'm querying it using CloudFlare or Google DNS. My guess is that they have many servers at different locations and their DNS returns the geographically closest one (and CloudFlare/Google DNS are not located in the same area).

Something like: https://docs.ultradns.neustar/HTML5/Content/User%20Guides/Traffic_Management_User_Guide/Directional.htm

This then defeat the great consensus thing :/

Kind regards.

from php-dns.