This test performs a forward DNS lookup using the local host name to query the local DNS server in the computer's environment for the computer's IP address, and reports whether the lookup was successful or not. The test can also be optionally configured to perform a reverse DNS lookup and reports its success/failure.

The parameters associated with this test are as follows:

• The TEST PERIOD list box helps the user to decide how often this test needs to be executed.

• In the HOST text box, the host name of the server for which the test is to be configured has to be specified.

• The port number to which the selected server is listening has to be specified in the PORT text box.

• Citrix XenApp is bundled with a Health Monitoring and Recovery (HMR) test pack, which provides a standard set of tests that can be configured to monitor the health of many XenApp components and report failures. Since the eG agent runs one of the HMR tests to determine the status of the forward/reverse DNS lookups, you need to configure the eG agent with the full path to the folder containing the HMR test pack. By default, the HEALTH MONITOR TEST PATH is set to default. This implies that the eG agent runs the HMR test from its default location, which is: C:\Progra~1\Citrix\HealthMon\Tests\Citrix. However, if the HMR test pack is available in a different location in your Citrix environment, then indicate that location in the HEALTH MONITOR TEST PATH text box. For instance, your specification can be: C:\LocalDir\Citrix\HealthMon\Tests\Citrix.

• By default, the REVERSE LOOKUP ENABLED flag is set to No. This implies that the test will not report the status of the reverse DNS lookup by default. To enable the test to perform reverse DNS lookup and report its success/failure, set this flag to Yes.

• If multiple components of the same component type are awaiting configuration, then an APPLY TO OTHER COMPONENTS check box will appear in this page. Clicking on this check box will allow you to apply the configuration to all/selected components of that type.

• Once the necessary values have been provided, clicking on the UPDATE button will register the changes made.

When changing the configuration for specific servers, a “*” beside the text box corresponding to the parameter signifies that these values have to be manually configured by the user. The parameter values that require to be configured will typically be prefixed with a “$” or contain a series of “*”. A value of "none" in the parameter value indicates that the corresponding parameter value can be changed if required.