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Page 94 SonicWALL Internet Security Appliance Administrator’s Guide
5. Syslog Server - In addition to the standard event log, the SonicWALL can send a detailed log to
an external Syslog server. The SonicWALL Syslog captures all log activity and includes every
connection source and destination IP address, IP service, and number of bytes transferred. The
SonicWALL Syslog support requires an external server running a Syslog daemon on UDP Port
514.
Syslog Analyzers such as WebTrends Firewall Suite can be used to sort, analyze, and graph the
Syslog data.
Enter the Syslog server name or IP address in the Add Syslog Server field. Messages from the
SonicWALL are then sent to the servers. Up to three Syslog Server IP addresses can be added.
If the SonicWALL is managed by SGMS, however, the Syslog Server fields cannot be configured
by the administrator of the SonicWALL.
6. E-mail Log Now - Clicking E-mail Log Now immediately sends the log to the address in the Send
Log To field and then clears the log.
7. Clear Log Now - Clicking Clear Log Now deletes the contents of the log.
8. Send Log / Every / At - The Send Log menu determines the frequency of log e-mail messages:
Daily, Weekly, or When Full. If the Weekly option is selected, then enter the day of the week the
e-mail is sent in the Every menu. If the Weekly or the Daily option is selected, enter the time of
day when the e-mail is sent in the At field. If the When Full option is selected and the log fills up,
it is e-mailed automatically.
9. When log overflows - The log buffer fills up if the SonicWALL cannot e-mail the log file. The
default behavior is to overwrite the log and discard its contents. However, you can configure the
SonicWALL to shut down and prevent traffic from traveling through the SonicWALL if the log is
full.
10. Syslog Individual Event Rate (seconds/event) - The Syslog Individual Event Rate setting
prevents repetitive messages from being written to Syslog. If duplicate events occur during the
period specified in the Syslog Individual Event Rate field, they are not written to Syslog as
unique events. Instead, the additional events are counted, and then at the end of the period, a
message is written to the Syslog that includes the number of times the event occurred.
The Syslog Individual Event Rate default value is 60 seconds and the maximum value is 86,400
seconds (24 hours). Setting this value to 0 seconds sends all Syslog messages without filtering.
11. Syslog Format - You can choose the format of the Syslog to be Default or WebTrends. If you
select WebTrends, however, you must have WebTrends software installed on your system.