Options dialog - DNS - Response Filtering
(Main window -> Options button -> DNS / Response Filtering)

Simple DNS Plus v. 5.1
Copyright © 1999-2008 JH Software ApS
Remove host records (A/AAAA) containing the following IP addresses from responses received from other DNS servers
When this option is enabled, hosts records with the IP addresses listed will be removed from responses.
 
Trusted DNS servers - host records will NOT be removed from responses from DNS servers with these IP addresses
IP addresses of trusted DNS servers.

 

 

Background:

 

This function is primarily intended to prevent DNS rebinding attacks - it can however also be used to filter out undesirable IP addresses in general.