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DNS on Windows Server 2003, 3rd Edition
book

DNS on Windows Server 2003, 3rd Edition

by Cricket Liu, Matt Larson, Robbie Allen
December 2003
Intermediate to advanced content levelIntermediate to advanced
416 pages
13h 50m
English
O'Reilly Media, Inc.
Content preview from DNS on Windows Server 2003, 3rd Edition

Registering Name Servers

When you get around to setting up more and more name servers, a question may strike you—do I need to register all of my primary and secondary name servers with my parent zone? The answer is no. Only those servers you want to make available to name servers outside of your zone need to be registered with your parent. For example, if you run nine name servers for your zone, you may choose to tell the parent zone about only four of them. Within your network, you use all nine servers. Five of those nine servers, however, are queried only by resolvers on hosts that are configured to query them. Their parent name servers don’t delegate to them, so they’ll never be queried by remote name servers. Only the four servers registered with your parent zone are queried by other name servers, including caching-only and partial-secondary name servers on your network. This setup is shown in Figure 9-6.

Registering only some of your name servers
Figure 9-6. Registering only some of your name servers

Besides being able to pick and choose which of your name servers are hammered by outside queries, there’s a technical motivation for registering only some of your zone’s name servers: there is a limit to how many servers will fit in a UDP response packet. In practice, around 10 name server records should fit. Depending on the data (how many servers’ names are in the same domain), you can get more or fewer.[2] There’s ...

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Publisher Resources

ISBN: 0596005628Supplemental ContentErrata Page