Introduction to Log

StoneOS records various system logs, including event logs, warning logs, network logs, and configuration logs.

The log function of StoneOS is a tool to show device operation status, providing evidence for you to analyze the network and protect against network attacks.

Log Severity

Logs categorize system events by severities. The eight severities are described as follows:

Severity	No.	Description	Log Definition
Emergencies	0	Identifies invalid system events.	LOG_EMERG
Alerts	1	Identifies problems which need immediate attention such as device is being attacked.	LOG_ALERT
Critical	2	Identifies urgent problems, such as hardware failure.	LOG_CRIT
Errors	3	Generates messages for system errors.	LOG_ERR
Warnings	4	Generates messages for warning.	LOG_WARNING
Notifications	5	Generates messages for notice and special attention.	LOG_NOTICE
Informational	6	Generates informational messages.	LOG_INFO
Debugging	7	Generates all debugging messages, including daily operatiol messages.	LOG_DEBUG

Export Destinations

Log messages can be sent to the following destinations:

Console - The default output destination. You can close this destination via CLI.
Remote - Includes Telnet and SSH.
Buffer - Memory buffer.
File - By default, the logs are sent to the specified USB destination in form of a file.
Syslog Server - Sends logs to UNIX or Windows Syslog Server.
Email - Sends logs to a specified email account.
Local database - Sends logs to the local database of the device.

Log Format

To facilitate the access and analysis of the system logs, StoneOS logs follow a fixed pattern of information layout, i.e. date/time, severity level@module: descriptions. See the example below:

2000-02-05 01:51:21, WARNING@LOGIN: Admin user "hillstone" logged in through console from localhost.

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