Книга: Windows Server 2012 R2 Storage, Security, & Networking Pocket Consultant

Configuring a secondary DNS server

Configuring a secondary DNS server

Secondary servers provide backup DNS services on the network. If you’re using full Active Directory integration, you don’t really need to configure secondaries. Instead, you should configure multiple domain controllers to handle DNS services. Active Directory replication will then handle replicating DNS information to your domain controllers. On the other hand, if you’re using partial integration, you might want

to configure secondaries to lessen the load on the primary server. On a small or medium-size network, you might be able to use the name servers of your Internet service provider (ISP) as secondaries. In this case, you should contact your ISP to configure secondary DNS services for you. Alternatively, you can put your public DNS records on a dedicated, external DNS service while hosting your private DNS records entirely on your internal DNS servers.

Because secondary servers use forward lookup zones for most types of queries, you might not need reverse lookup zones. But reverse lookup zone files are essential for primary servers, and you must configure them for proper domain name resolution.

If you want to set up your own secondaries for backup services and load balancing, follow these steps:

1. Start the DNS Manager console. If the server you want to configure isn’t listed, connect to it as described previously.

2. Press and hold or right-click the server entry, and then tap or click New Zone to start the New Zone Wizard. Tap or click Next.

3. For Zone Type, select Secondary Zone. Tap or click Next.

4. Secondary servers can use both forward and reverse lookup zone files. You create the forward lookup zone first, so select Forward Lookup Zone, and then tap or click Next.

5. Enter the full DNS name for the zone, and then tap or click Next.

6. Tap or click in the Master Servers list, enter the IP address of the primary server for the zone, and then press Enter. The wizard then attempts to validate the server. If an error occurs, be sure the server is connected to the network and that you’ve entered the correct IP address. Also ensure that you’ve enabled zone transfers on the primary. If you want to copy zone data from other servers in case the first server isn’t available, repeat this step.

7. Tap or click Next, and then tap or click Finish. On a busy or large network, you might need to configure reverse lookup zones on secondaries. If so, follow the steps listed in the next section.

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