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DNS and Iodine

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<strong>DNS</strong> & <strong>Iodine</strong><br />

Christian Grothoff<br />

<strong>DNS</strong> Zone Transfers<br />

• A <strong>DNS</strong> Zone transfer copies the <strong>DNS</strong> database<br />

• Organization typically has “backup” (secodary) <strong>DNS</strong><br />

server<br />

• Changes to primary <strong>DNS</strong> database must be propagated<br />

to backup server<br />

• RFC 2136 “<strong>DNS</strong> UPDATE” specifies incremental<br />

update for fast convergence<br />

14

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