[dns-operations] EDNS client subnet authoritative server implementation

Stefan Schmidt zaphodb at zaphods.net
Fri Feb 9 15:12:42 UTC 2018

On 2018-02-09 15:41, John Kristoff wrote:
> Thank you Stefan, very helpful.  Does this mean you're using an earlier
> version of PowerDNS 3.4.0 then as demonstrated by your example where
> Google returns client subnet detail?

No, i think we upgraded about the time Wilmer van der Gaast announced 
that Google DNS would switch as well [1] and have been using it on 
PowerDNS 3.4 and 4.0.5 for a while now. While i have not tried ECS on 
PowerDNS 4.1.0 yet i'm sure it will be just as well with the amount of 
tests for ECS that i spotted in the code so far. Searching my emails i 
also found the announcement that Google DNS will now autodetect EDNS 
Client Subnet with Code 8. [2]



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