ECS implementation in Unbound and Privacy Concerns

[sir izake]

Dear All,

I have Unbound 1.20 DNS recursive  resolver. I intend to enable ECS to
improve geo-location response to CDN resources.

Unfortunately,  i got below error after i enabled subnetcache in modules

module-config: "respip validator subnetcache iterator"

fatal error: module_conf lists module 'subnetcache' but that module is not
available

How do I get this to work?

If anyone has successfully set this up in their environment, how did you
minimize exposure to users IP info. Did you observe any performance related
issues?

Warm regards
Isaac
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