Note:   This parameter has been deprecated in favor of dns.cache.timeout.

This configuration parameter specifies the amount of time, in seconds, before a cached DNS response expires.

In most cases, you set this configuration parameter using group policy. You can, however, set it manually in the configuration file if you are not using group policy or want to temporarily override group policy.

If you are manually setting this parameter, the parameter value should be a positive integer. For example, the default values expires a cached DNS response after 300 seconds:

adclient.dns.cache.timeout: 300