Secure Firewall 3100 ASA Getting Started

Power on the firewall

Updated: March 18, 2026

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Overview

How to power on the Secure Firewall 3100 and confirm it started successfully by checking the front-panel LEDs for power and system status.

System power is controlled by a rocker power switch located on the rear of the firewall. The rocker power switch provides a soft notification that supports graceful shutdown of the system to reduce the risk of system software and data corruption.

Procedure

Attach the power cord to the firewall, and connect it to an electrical outlet.

Turn the power on using the rocker power switch located on the rear of the chassis, adjacent to the power cord.

Check the LEDs for the current status.

Power LED—Solid green means the firewall is powered on.

System (S) LED—See the following behavior:

Table 1. System (S) LED Behavior
LED Behavior	Description	Time After Device Powered On (minutes:seconds)
Fast flashing green	Booting up	01:00
Fast flashing amber (error condition)	Failed to boot up	01:00
Solid green	Application loaded	15:00 - 30:00
Solid amber (error condition)	Application failed to load	15:00 - 30:00

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