The App Health Reports page (Usage > App Health Reports) summarizes unresponsive hosts that users have tried to connect to over the past 24 hours
There may be two steps involved when a user tries to connect to a host. First is resolving the the host/resource name into an IP address and second is sending/receiving traffic to/from that host. App Health Reports covers both of these eventualities:
When any type of resolver is used and they return errors, then these will appear in an app health report. For instance, a cloud resolver might report invalid credentials or API quota issues, and a DNS server might report NXDOMAIN.
Once an IP address is obtained and a user attempts to connect to an app using an action defined with a specific host definition (/32 or /128) and using an ALLOW rule and the TCP up protocol: the Gateway monitors the return traffic from the host to ensure there is a response. When there is no response within 30 seconds, an unresponsive report is generated.
NOTE
It is not possible to monitor ranges of IP addresses as there is no way to determine that a range is responsive based on user's traffic.
The App Health Reports page summarizes the number of unresponsive reports generated over the past 24 hours in which at least five users have experienced problems with the same app.
Background information
App Health Reports is part of Digital Experience Monitoring which is a separately licensable option. For information about how licensing works, refer to Licenses.
The Active Sessions details for each user will show if they have triggered any unresponsive host reports. There is both a global report and a Site/Gateway-specific report.
The Troubleshooting user/device access section provides comprehensive guidance that will help you track down access issues.
Viewing specific Entitlements
Click on any row in the App Health Reports page to access specific details about relating to the affected entitlement.
App Reports identify the IP address of the unresponsive host and the port on which the user was connecting. It also provides the action reference number, with which users can reference back to the original entitlement configuration.
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Name Reports detail any error and the intended target.
NOTE
When an entitlement appears in the App Health Reports list, the issue may relate to only one of the actions specified in the entitlement and within that, only one of the hosts listed.