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Secure DNS SolutionsSecure DNS SolutionsRooster

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Introduction 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.

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AgendaAgenda

Brief overview of DNS and it’s importance

Weaknesses of DNSWhat is being proposed in the IETFWhat can be done nowSources of information

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Overview Overview

DNS is one of the most important services on the Internet and one of the weakest.

No authenticationIncremental Zone TransfersDynamic UpdatesDNS spoofingCache corruptionUDP easily spoofed

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RFC’sRFC’s

Secure Domain Name System Dynamic Update (RFC 2137)

Domain Name System Security Extensions (RFC 2535)

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Weaknesses in DNSWeaknesses in DNS

SpoofingCache CorruptionZone TransfersDynamic Updates

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Encryption and DNSEncryption and DNS

Explain detailsGive an exampleExercise to re-enforce learning

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Securing your DNS server nowSecuring your DNS server now

Upgrade Upgrade UpgradeRestrict zone transfersRestrict Dynamic UpdatesTurn off recursive queries unless necessaryRestrict who can do queries

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SummarySummary

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?