Features

• Can REFUSE base on query-name for any resource-record type.
  • Query will not leave the server or is not forwarded.
• REDIRECT based on query-name for A, AAAA, CNAME, MX, SOA or SRV resource-record types.
• Can generate custom responses based on query-name for TXT records.
• Can REDIRECT based on answer/responses for A, AAAA, CNAME, MX, SOA and SRV resource-record types.
• Matching can be done based on domain-name, IP Address (both IPv4 and IPv6, both address or CIDR notations), or regexes.
  • IP-Address only on answers/responses.
  • Both whitelisting or blacklisting supported (whitelisting has precedence).
• Can collapse CNAME chains.
• Can REFUSE IPv6 based queries and answers (AAAA resource records, IPv6 Addresses or .ip6.arpa domains).
• Can use local-files or URL-Based lists for black and whitelisting.
  • Auto-update supported.
  • Includes extensive unduplicating to keep memory usage low.'
  • Saves lists for distribution purposes.
• Matched queries are cached for performance.
  • Can be saved to build more efficient lists.
• Elaborate logging on the filtering/processes.
• Command-line interface for all above.

and more ...