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P-660R-F1 Series User’s Guide
191
C
HAPTER
16
Logs
16.1
Overview
This chapter contains information about configuring general log settings and viewing the ZyXEL
Device’s logs.
The web configurator allows you to choose which categories of events and/or alerts to have the
ZyXEL Device log and then display the logs or have the ZyXEL Device send them to an
administrator (as e-mail) or to a syslog server.
16.1.1
What You Can Do in the Log Screens
Use the View Log screen (
Section 16.2 on page 191
) to see the logs for the categories that you
selected in the Log Settings screen.
Use The Log Settings screen (
Section 16.3 on page 193
) to configure the mail server, the syslog
server, when to send logs and what logs to send.
16.1.2
What You Need To Know About Logs
Alerts
An alert is a message that is enabled as soon as the event occurs. 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.
Logs
A log is a message about an event that occurred on your ZyXEL Device. For example, when
someone logs in to the ZyXEL Device, you can set a schedule for how often logs should be enabled,
or sent to a syslog server.
16.2
The View Log Screen
Use the View Log screen to see the logs for the categories that you selected in the Log Settings
screen (
Section 16.3 on page 193
). Click Maintenance > Logs to open the View Log screen.
Entries in red indicate alerts. The log wraps around and deletes the old entries after it fills. Click a
column heading to sort the entries. A triangle indicates ascending or descending sort order.
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Figure 123
Maintenance > Logs > View Log
The following table describes the fields in this screen.
Table 71
Maintenance > Logs > View Log
LABEL
DESCRIPTION
Display
The categories that you select in the
Log Settings
screen display in the drop-
down list box.
Select a category of logs to view; select
All Logs
to view logs from all of the log
categories that you selected in the
Log Settings
page.
Email Log Now
Click this to send the log screen to the e-mail address specified in the
Log
Settings
page (make sure that you have first filled in the
E-mail Log Settings
fields in
Log Settings
).
Refresh
Click this to renew the log screen.
Clear Log
Click this to delete all the logs.
#
This field is a sequential value and is not associated with a specific entry.
Time
This field displays the time the log was recorded.
Message
This field states the reason for the log.
Source
This field lists the source IP address and the port number of the incoming packet.
Destination
This field lists the destination IP address and the port number of the incoming
packet.
Notes
This field displays additional information about the log entry.
Use WAN IP
Address
Select this option to update the IP address of the host name(s) to the WAN IP
address.
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16.3
The Log Settings Screen
Use the Log Settings screen to configure the mail server, the syslog server, when to send logs and
what logs to send.
To change your ZyXEL Device’s log settings, click
Maintenance > Logs > Log Setting
s. The
screen appears as shown.
Alerts are e-mailed as soon as they happen. Logs may be e-mailed as soon as the log is full.
Selecting many alert and/or log categories (especially
Access Control
) may result in many e-mails
being sent.
Figure 124
Maintenance > Logs > Log Settings
The following table describes the fields in this screen.
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Table 72
Maintenance > Logs > Log Settings
LABEL
DESCRIPTION
E-mail Log Settings
Mail Server
Enter the server name or the IP address of the mail server for the e-mail
addresses specified below. If this field is left blank, logs and alert messages will
not be sent via E-mail.
Mail Subject
Type a title that you want to be in the subject line of the log e-mail message that
the ZyXEL Device sends. Not all ZyXEL Device models have this field.
Send Log to
The ZyXEL Device sends logs to the e-mail address specified in this field. If this
field is left blank, the ZyXEL Device does not send logs via e-mail.
Send Alerts to
Alerts are real-time notifications that are sent as soon as an event, such as a DoS
attack, system error, or forbidden web access attempt occurs. Enter the E-mail
address where the alert messages will be sent. Alerts include system errors,
attacks and attempted access to blocked web sites. If this field is left blank, alert
messages will not be sent via E-mail.
Log Schedule
This drop-down menu is used to configure the frequency of log messages being
sent as E-mail:
Daily
Weekly
Hourly
When Log is Full
None.
If you select
Weekly
or
Daily
, specify a time of day when the E-mail should be
sent. If you select
Weekly
, then also specify which day of the week the E-mail
should be sent. If you select
When Log is Full
, an alert is sent when the log fills
up. If you select
None
, no log messages are sent.
Day for Sending
Log
Use the drop down list box to select which day of the week to send the logs.
Time for
Sending Log
Enter the time of the day in 24-hour format (for example 23:00 equals 11:00 pm)
to send the logs.
Clear log after
sending mail
Select the checkbox to delete all the logs after the ZyXEL Device sends an E-mail
of the logs.
Syslog Logging
The ZyXEL Device sends a log to an external syslog server.
Active
Click
Active
to enable syslog logging.
Syslog IP
Address
Enter the server name or IP address of the syslog server that will log the selected
categories of logs.
Log Facility
Select a location from the drop down list box. The log facility allows you to log the
messages to different files in the syslog server. Refer to the syslog server manual
for more information.
Active Log and Alert
Log
Select the categories of logs that you want to record.
Send
Immediate Alert
Select log categories for which you want the ZyXEL Device to send E-mail alerts
immediately.
Apply
Click this to save your customized settings and exit this screen.
Cancel
Click this to restore your previously saved settings.
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16.4
SMTP Error Messages
If there are difficulties in sending e-mail the following error message appears.
“SMTP action request failed. ret= ??". The “??"are described in the following table.
Table 73
SMTP Error Messages
16.4.1
Example E-mail Log
An "End of Log" message displays for each mail in which a complete log has been sent. The
following is an example of a log sent by e-mail.
You may edit the subject title.
-1 means ZyXEL Device out of socket
-2 means tcp SYN fail
-3 means smtp server OK fail
-4 means HELO fail
-5 means MAIL FROM fail
-6 means RCPT TO fail
-7 means DATA fail
-8 means mail data send fail

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