ZyXEL Communications FMG3024-D10A User Manual

Page of 316
FMG3024-D10A / FMG3025-D10A Series User’s Guide
205
C
H A P T E R
      1 9
Logs
19.1  Overview 
The web configurator allows you to choose which categories of events and/or alerts to have the 
Device log and then display the logs or have the Device send them to an administrator (as e-mail) 
or to a syslog server. 
19.1.1  What You Can Do in this Chapter
• Use  the  System Log screen to see the system logs for the categories that you select (
).
• Use  the  Phone Log screen to view phone logs and alert messages (
).
• Use  The  VoIP Call History screen to view the details of the calls performed on the Device 
(
19.1.2  What You Need To Know
The following terms and concepts may help as you read this chapter.
Alerts and Logs
An alert is a type of log that warrants more serious attention. They include system errors, attacks 
(access control) and attempted access to blocked web sites. Some categories such as System 
Errors
 consist of both logs and alerts. You may differentiate them by their color in the View Log 
screen. Alerts display in red and logs display in black.
Syslog Overview 
The syslog protocol allows devices to send event notification messages across an IP network to 
syslog servers that collect the event messages. A syslog-enabled device can generate a syslog 
message and send it to a syslog server.
Syslog is defined in RFC 3164. The RFC defines the packet format, content and system log related 
information of syslog messages. Each syslog message has a facility and severity level. The syslog 
facility identifies a file in the syslog server. Refer to the documentation of your syslog program for 
details. The following table describes the syslog severity levels. 
Table 66   
Syslog Severity Levels
CODE
SEVERITY
0
Emergency: The system is unusable.
1
Alert: Action must be taken immediately.
2
Critical: The system condition is critical.