Log; Chapter 20 Log; Overview; What You Can Do In This Chapter - ZyXEL Communications VMG1312-B Series User Manual

20.1 Overview

The web configurat or allows you t o choose which cat egories of event s and/ or alert s t o have t he
Device log and t hen display t he logs or have t he Device send t hem t o an adm inist rat or ( as e- m ail)
or t o a syslog server.

20.1.1 What You Can Do in this Chapter

• Use t he Syst e m Log screen t o see t he syst em logs (
• Use t he Se cu r it y Log screen t o see t he securit y- relat ed logs for t he cat egories t hat you select
( Sect ion 20.3 on page

20.1.2 What You Need To Know

The following t erm s and concept s m ay help as you read t his chapt er.
Alerts and Logs
An alert is a t ype of log t hat warrant s m ore serious at t ent ion. They include syst em errors, at t acks
( access cont rol) and at t em pt ed access t o blocked web sit es. Som e cat egories such as Syst e m
Er r or s consist of bot h logs and alert s. You m ay different iat e t hem by t heir color in t he Vie w Log
screen. Alert s display in red and logs display in black.
Syslog Overview
The syslog prot ocol allows devices t o send event not ificat ion m essages across an I P net work t o
syslog servers t hat collect t he event m essages. A syslog- enabled device can generat e a syslog
m essage and send it t o a syslog server.
Syslog is defined in RFC 3164. The RFC defines t he packet form at , cont ent and syst em log relat ed
inform at ion of syslog m essages. Each syslog m essage has a facilit y and severit y level. The syslog
facilit y ident ifies a file in t he syslog server. Refer t o t he docum ent at ion of your syslog program for
det ails. The following t able describes t he syslog severit y levels.
Table 89 Syslog Severit y Levels
CODE
0
1
2
3
4
VMG1312-B Series User's Guide
245) .
SEVERITY
Em ergency: The syst em is unusable.
Alert : Act ion m ust be t aken im m ediat ely.
Crit ical: The syst em condit ion is crit ical.
Error: There is an error condit ion on t he syst em .
Warning: There is a warning condit ion on t he syst em .
C
HAPTER
Sect ion 20.2 on page
2 0

Log

244) .
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