Setting Up and Reviewing the SOA Record

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Setting Up and Reviewing the SOA Record

Configuring a zone is straightforward. Essentially, the information that you are entering here includes details for the Start of Authority (SOA) record and information about using WINS.

Setting up the information is easy. The following steps outline the process:

1.	Right-click the zone you want to configure. Choose Properties from the menu. The Properties dialog box should appear and present the basic zone information (see Figure 13.10).
2.	Click on the SOA Record tab to bring up the information about the SOA (see Figure 13.11).

Edit the information in the SOA record. The fields that you can change here are as follows:

Primary Name Server DNS Name. The name of the Primary name server that contains the files for the domain. Note that only the host name is entered, and then a "." that means this domain (for example, NS1 is NS1.ScrimTech.com.)
Responsible Person Mailbox DNS Name. The e-mail address of the person who is in charge of the DNS. (Note, as in the Primary Name Server, you need to enter only the e-mail—followed by a period—if the e-mail address is within this domain.
Serial Number. A version ID that is assigned to the zone. The number is updated whenever you make changes to the database, so the secondary servers know that changes were made and can retrieve the new information.
Refresh Interval. Tells the Secondary servers how often they should check their version number with the primaries to see if they need to transfer the zone information again.
Retry Interval. Tells how long the Secondary server should wait before retrying the Primary server if it could not connect at the time given in Refresh Interval.
Expire Time. Sets how long a Secondary Server continues to give out information on this zone after not being able to connect with the Primary server.
Minimum Default TTL. When a DNS Server performs an inerative query to resolve a name, the name is cached. This value sets how long other DNS Servers are allowed to keep the information about records that your DNS Server resolves for them.

4.	Click the Notify tab (see Figure 13.12). (This is not really part of the SOA; however, it is added here because it deals with the Secondary servers.)
5.	Enter the IP addresses of all the Secondary servers that should be notified when a change is made.
6.	If desired, you can choose Only Allow Access From Secondaries Included on Notify List, which restricts which servers can retrieve your zone information.
7.	Click OK to accept the changes you have made (the WINS tab is covered in the next section).

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