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- From the Data Management tab, select the DNS tab, expand the Toolbar and click Grid DNS Properties.
- In the Grid DNS Properties editor, click Toggle Advanced Mode.
- When the additional tabs appear, click Host Naming.
The Host Name Policies section lists the following preconfigured record policies:- Strict Hostname Checking: You can only use hostnames that contain alphanumeric characters and , dashes ("-"-), and asterisks (*). You cannot use other special characters, such as underscore ("_"). Note that when you select this policy, the appliance automatically applies the policy to dynamic DNS updates and zone transfers it receives. When you select this, you can enter host names through Grid Manager using punycode, but not IDNs. The appliance stores IDNs that are created through DDNS updates and DNS transfers in punycode. You can monitor non-compliant host names using the Hostname Compliance report. For information, see Obtaining a List of Invalid Record Names.
- Allow Underscore: You can only use hostnames with alphanumeric characters, dashes, and underscores ("-" and "_"). This is the default.
- Allow Any: You can use any hostname.
- Click Add to define your own hostname checking policy.
- Enter a record policy name and a regular expression string, and click OK. See Appendix D, "Regular Expressions", for definitions of regular expressions.
Note that Grid Manager does not validate the regular expressions that you enter. Therefore, you can inadvertently specify an invalid regular expression that might cause noncompliance errors when you create records. - If you select the Strict Hostname Checking policy, the Apply policy to dynamic updates and inbound zone transfers (requires Strict Hostname Checking setting) option is enabled by default. It enables the appliance to apply the policy to dynamic DNS updates and zone transfers that it receives. You can then select which action the appliance takes when it encounters names that do not conform to the policy. Select either Fail or Warn. If you select Warn, the appliance allows the dynamic DNS update or zone transfer, but logs a syslog message.
Note: The Strict Hostname Checking policy only allows alphanumeric characters and dashes ("-"). In addition, this policy allows IDNs that are written in punycode. You cannot use other special characters, such as underscore ("_"). Therefore, DDNS updates from Microsoft Active Directory controllers may not be accepted. - Save the configuration and click Restart if it appears at the top of the screen.
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