Question about BIND and RPZ

Felipe Arturo Polanco felipeapolanco at
Sat Aug 4 13:52:51 UTC 2018


I have a question regarding BIND and its RPZ functionality.

We are using a DNS provider that blocks malware by returning an NXDOMAIN
response back whenever a match is found.

The way they differentiate between real non-existent websites vs malware
sites is by turning off the 'recursion available' bit in the NXDOMAIN
response, non-existent sites do have this bit turned on.

Is there a way to match this flag in an RPZ policy to redirect malware
sites response to a wall garden website while not matching real
non-existent websites?

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