Managing DNS Service

Mac OS X Server provides a simple interface for starting and stopping DNS service as well as viewing logs and status. Basic DNS settings can be configured with Server Admin. More advanced features require configuring BIND from the command-line, and are not covered here.

Starting and Stopping DNS Service

Use this procedure to start or stop DNS service. Remember to restart the DNS service whenever you make changes to the DNS service in Server Admin.

To start or stop DNS service:

1In Server Admin, choose DNS from the Computers & Services list.

2Make sure you have at least one Zone and its reverse lookup zone created and fully configured.

3Click Start Service or Stop Service.

The service may take a moment to start (or stop).

Enabling or Disabling Zone Transfers

In the Domain Name System, zone data is replicated among authoritative DNS servers by means of the “zone transfer.” Secondary DNS servers (“slaves”) use zone transfers to acquire their data from primary DNS servers (“masters”). Zone transfers must be enabled to use secondary DNS servers.

To enable or disable zone transfer:

1In Server Admin, choose DNS in the Computer & Services list.

2Click Settings.

3Select the General tab.

4Select or deselect Allow Zone Transfers as needed.

Enabling or Disabling Recursion

Recursion is a process to fully resolve domain names into IP addresses. Users’ applications depend on the DNS server to perform this function. Other DNS servers that query yours don’t have to perform the recursion.

To prevent malicious users from altering the master zone’s records (“cache poisoning”), or allowing unauthorized use of the server for DNS service, you can disable recursion. However, if you stop it, your own users won’t be able to use your DNS service to look up any names outside of your zones.

You should only disable recursion if no clients are using this DNS server for name resolution and no servers are using it for forwarding.

Chapter 2 DNS Service

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Apple 034-2351_Cvr manual Managing DNS Service, Starting and Stopping DNS Service, Enabling or Disabling Zone Transfers
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