[Pdns-users] LUA records when behind the recursor

[Brian Candler]

On 29/09/2018 13:42, Brian Candler wrote:
> Note that the default resolution is /24, i.e. you only get the top 24 
> bits of the client IP address, but if you need more specific 
> information you can change this setting (ecs-ipv4-bits)

But beware that setting it too fine will have a big negative impact on 
your DNS cache - since it'll have to make and store separate recursive 
queries for clients within each range.

Also, make sure edns-subnet-whitelist contains only your own domains or 
authoritative server IPs, so that general web browsing does not make 
separate queries for each client subnet.