js-reverse-dns-ip-filter

Javascript Reverse DNS IP Filter

Verify a caller IP against supposed calling service IPs.
This library resolve supposed calling service IP to get service FQDN name
and then ask core dns all known FQDN (*.service.local) for this service.

If caller IP does not match a known IP for the service false value is returned else true is returned

This library is known to work with Kubernetes core dns in cluster mode.