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System Health shows as critical "Device is encountering persistent connection failures", affected are * domains


Article ID: 162230


Updated On:


Endpoint Detection and Response Advanced Threat Protection Platform


ATP:N System Health shows as critical with message "Device is encountering persistent connection failures"

Verifying this with status_check following can be observed:
Connectivity to Servers:
                                AzTec Server is NOT reachable. (
                                Software Update Server is NOT reachable. (

Verifying connection to any of the servers above via tcp_check, connection is shown as "Connected".


It is possible that Symantec Advanced Threat Protection:Network (SATP:N) is connecting via HTTPS/SSL filtering device (Firewall, Proxy Server etc) to the remote systems. If so, filtering of HTTPS connections from SATP:N system must be disabled on these devices.

Please note: It is recommended not to filter any ports or protocols as far as connections from SATP:N device to remote backend servers are concerned.

Please contact Symantec support for further assistance.