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Secure DNS Solutions

Secure DNS Solutions. Rooster. Introduction. What does security mean for DNS? What security problems exist for DNS, what is being done about them, and what you can do now to prevent people from corrupting your DNS infrastructure.

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Secure DNS Solutions

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  1. Secure DNS Solutions Rooster

  2. Introduction • What does security mean for DNS? • What security problems exist for DNS, what is being done about them, and what you can do now to prevent people from corrupting your DNS infrastructure. • IT specialists, managers, consultants, and everybody who needs to deal with their own DNS servers.

  3. Agenda • Brief overview of DNS and it’s importance • Weaknesses of DNS • What is being proposed in the IETF • What can be done now • Sources of information

  4. Overview • DNS is one of the most important services on the Internet and one of the weakest. • No authentication • Incremental Zone Transfers • Dynamic Updates • DNS spoofing • Cache corruption • UDP easily spoofed

  5. RFC’s • Secure Domain Name System Dynamic Update (RFC 2137) • Domain Name System Security Extensions (RFC 2535)

  6. Weaknesses in DNS • Spoofing • Cache Corruption • Zone Transfers • Dynamic Updates

  7. Encryption and DNS • Explain details • Give an example • Exercise to re-enforce learning

  8. Securing your DNS server now • Upgrade Upgrade Upgrade • Restrict zone transfers • Restrict Dynamic Updates • Turn off recursive queries unless necessary • Restrict who can do queries

  9. Summary • DNS is very vulnerable to all kinds of attacks, the key is staying on top of developments in DNSSEC and making sure your implementation is secure • Questions?

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