The Domain Name Server (DNS) monitor sends UDP DNS queries to a device and verifies it receives a valid response. If a response is not received, the monitor is considered Down. If the DNS response contains multiple responses, the monitor compares each against the validation pattern. If no matches are found, the monitor is considered Down.
Provide a unique name and description for the monitor, then configure the following:
- . Enable this option to have the monitor appear in Device Properties. If enabled, clicking from the device management actions menu within the Device Properties interface adds the monitor to the selected device if the applicable protocol or service is active on that device.
- . Enter the length of time WhatsUp Gold attempts to connect to the selected device. When the specified time is exceeded without connecting, a timeout occurs and WhatsUp Gold stops trying to connect to the server. This is considered a failed connection.
- . By default, the DNS active monitor queries the device to which the monitor is assigned. Enter an alternate IP address to force the monitor to query a different device. Please note, you can also use the
%Device.Address percent variable in this configuration field though no other percent variables are supported.
- . By default, the DNS active monitor performs a reverse DNS lookup using
188.8.131.52.in-addr.arpa. Enter an alternate name to force the monitor to query a different domain or subdomain.
- . Select the type of DNS record for the monitor to query. The default type is Pointer Record.
- . Enter an IP Address or regular expression pattern against which to check the DNS monitor query results.