[Pdns-users] PowerDNS Recursor / dnsdist: EDNS Client Subnet

Bjoern Franke bjo at schafweide.org
Sun Nov 24 10:50:00 UTC 2019


I'm running dnsdist with one PowerDNS Recursor as downstream. I tried to 
figure out how I can get the EDNS Client Subnet through.

E.g. if I use DoT with my mobile phone and come from (o2 
Germany in Hamburg), usually the traffic to Akamai is routed to Akamai 
in Hamburg if I use o2's DNS, OpenDNS or Using my dnsdist in 
Nuremberg, Akamai traffic is routed to Frankfurt.

I enabled "useClientSubnet=true" for dnsdist and several EDNS Client 
options in PowerDNS Recursor (ecs-add-for, edns-subnet-whitelist, 
use-incoming-edns-subnet) but nothing changes.

I stumpled upon a mail from Bert Hubert years ago mentioning 
www.geo.powerdns.com, but it seems not to work any more. In that thread 
was also mentioned edns-client-sub.net, which tells me that ECS is 
false. For my confusion, it also says ECS false when I use OpenDNS which 
supports EDNS Client Subnets afaik.

Did I miss something and getting EDNS Client Subnets through that setup 
will only work when #8401[1]/ #8402[2]

Best Regards


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