From the WhatsUp Gold navigation menu:

1. Select the Settings tab, select Alerts and Actions and choose Alert Center.

   Alert Center Libraries view displays.

2. Click the Failed Connections panel (if collapsed).

   The Failed Connections displays.

3. On the Failed Connections panel, click "add" ().

   The Select Failed Connections Type dialog displays.

4. Choose Failed Connections and click OK.

   The Configure Threshold Alert dialog displays.

5. Edit the Failed Connections configuration.

Track devices experiencing failed, incomplete, or malformed connections. See port scanning, probing, and DoS attacks.

Configure a Network Traffic Analysis failed connections threshold:

• Name. Used in the Threshold library and the quick select title on the Alert Center Dashboard.
• Notification Policy. (Optional) Select the notification policy to apply to this threshold. The policy initiates notifications when an item is outside the configured threshold limits.
• Threshold Check Interval. Enter a time interval for Alert Center to check the Network Performance Monitor database for items that are out of the threshold limits.

  Automatically resolve items no longer out of threshold. Select this option if you want Alert Center to automatically resolve items when they return to the value within the threshold limit

Note: Notification policies are optional for most thresholds. If you do not select a notification policy, no notifications are generated for the threshold, but a dashboard report listing the out of threshold items still appears on the Alert Center Home page.

Add Condition Rules

• a host has... Select the direction(s) of traffic to consider.
• more than... Select a magnitude (limit) for conversation partners.
• in the past... Select a period for the measurement.

Select Applied Hosts

Note: Sources sending sampled data are not displayed as a selection option in the Traffic to monitor list because Network Traffic Analysis cannot determine that traffic has failed on sampled data.

• Traffic to monitor. By default, the threshold is set to monitor traffic from all Network Traffic Analysis Sources. Select the Network Traffic Analysis source or interface from which to monitor traffic. When you select a source, traffic for all interfaces on the source is monitored. When you select an interface, only traffic for the selected interface is monitored.

  Tip: When you select a source, traffic for all interfaces on the source is monitored. When you select an interface, only traffic for the selected interface is monitored.

• Hosts to monitor. By default, the threshold monitors all applicable hosts. You can also select IP ranges and IP Groups.
  • All Hosts. By default, the threshold monitors all applicable hosts

    Exclude Hosts. Select to ignore the traffic for a list of hosts you assemble here.

  • Specific Hosts. Click Apply this Threshold to Specific Hosts to choose the hosts to which the threshold applies.

    

Note: Configure the threshold check interval for a longer time than the sampling interval for thresholds relating to trends, such as percent utilization. Configure it for a time the same as (or similar to) the sampling interval when configuring a threshold for a health check.

Tip: Avoid setting the threshold check interval to a very short time. Aggressive intervals can degrade system performance. In general, setting the threshold check interval to less than five minutes is not advised.

Clone a threshold based on a custom or built-in configuration:

1. Click on a threshold on the Thresholds Library panel you want to copy.
2. Click the Copy button, and click OK to create a new Failed Connections.

   The Edit Failed Connections dialog displays.

3. Save or customize your new threshold, either:
   • Type in a new value for Name field (or keep the default) and click OK to save to the Thresholds Library.
   • Follow the Edit Failed Connections instructions.

Delete an existing Failed Connections:

1. Select Failed Connections you want to delete from the Failed Connections panel.
2. Click the Delete button, and then click Yes to confirm the deletion.

   The Failed Connections configuration is deleted.