9. The method of claim 8 wherein the range of source IP addresses are represented in CIDR notation.
9. The method of claim 8 wherein the range of source IP addresses are represented in CIDR notation. 10. The method of claim 9 wherein determining that a first field in a portion of the received DNS queries matches the filter criteria comprises matching a source IP address in the portion of the received DNS queries to an IP address in the filter rule.