Useful references
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- Albitz P. and Liu C., DNS and BIND 4th edition (O'Reilly 2001) ISBN 0-596-00158-4.
- Larson M. and Liu C. DNS on Windows 2000 2nd edition (O'Reilly 2001) ISBN 0-596-00230-0.
Janet CSIRT Blog post series - simple ways to improve your DNS resilience and security: