On 04/08/2016 16:45, WANG Cui 王璀 wrote:
I researched in the source code and find out in file: pdns_recursor.cc,
function: getEDNSSubnetMask(), there is an if test:
* if(g_ednsdomains.check(dn) || g_ednssubnets.match(rem)) where the
“rem” is actually is the forwarder IP that I set by:
* forward-zones-recurse=.=8.8.8.8
Of course the if test won’t pass, therefore pdns-recursor never append
subnet option in query.
I couldn't see this setting in the current documentation, but I found
from a previous announcement:
https://mailman.powerdns.com/pipermail/pdns-users/2015-November/011803.html
"It works by setting edns-subnet-whitelist to a list of domain names or
nameserver netmasks that should be getting EDNS Client Subnet queries."
So it seems to be behaving as stated: if it's a subnet, it matches
against the remote nameserver which the query is being sent to.
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