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[ScreenOS] How to troubleshoot an amber or red 'ALARM' LED on the firewall

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Article ID: KB13239 KB Last Updated: 30 May 2019Version: 7.0
Summary:
This article provides information on how to troubleshoot an amber or red ALARM LED on the front panel of the firewall.
Symptoms:
The LED turns red due to the following reasons:
  • Failure of hardware component or software module.
  • Firewall attacks detected.
  • Red blinking - self-test failure occurred when ScreenOS was starting up.

  •  
The LED turns amber due to the following reasons:
  • Low memory (less than 10% remaining).
  • High CPU utilization (more than 90% in use).
  • Session full.
  • Maximum number of VPN tunnels reached,
  • When HA/NSRP is configured, the alarm LED on both of the units will turn yellow/amber to let you know that they are configured for NSRP. This is due to an informational event in the event log. For more information, refer to KB5845 - Alarm LED is yellow/amber when two Juniper Firewalls are in a NSRP cluster.
  • HA status changed or redundant group member not found.

Note:  The reasons do vary, depending on the type of Security device. The LEDs are described in the Hardware Technical Documentation User's Guide or Hardware Installation and Configuration Guide.  
Solution:
Perform the following procedure to correct a red or amber ALARM LED:
  1. Run the following command to determine what alarm is being reported and note it down:
    get alarm event
  2. For the specific alarm, look for the meaning and recommended action in the Message Log Reference Guide

    Additional Reference:
    Firewall attacks are documented in the Concepts & Examples ScreenOS Reference Guide: Part 4, Attack Detection and Defense.   If a hardware component needs to be replaced, Contact Support

  3.   Clear the ALARM LED. For more information, refer to KB5394 - How do I turn off the alarm LED?
Modification History:
2019-05-22: Content reviewed for accuracy.  Links updated. 
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