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Important events like a login failure or a firmware update are logged to a selection of logging
destinations. Each of those events belongs to an event group, which can be activated
separately.
In the Event Log Settings you can choose how many log entries are shown on each page.
Furthermore, you can clear the log file here.
List logging enabled
The common way to log events is to use the internal log list of the U8/16-IP. To show the log
list, click on Event Log on the Maintenance page.
Since the U8/16-IP’s system memory is used to save all the inf ormation, the maximum number
of possible log list entries is restricted to 1000 events. Every entry that exceeds this limit
overrides the oldest one.
NFS Logging enabled
Defines an NFS server to write all logging data to a file that is located there. To write logging
data from multiple U8/16-IP units to only one NFS share, you have to define a file name that is
unique for each device. When you change the NFS settings and press Apply, the NFS share
will be mounted immediately. That means, the NFS share and the NFS server must be filled
with valid sources or you will get an error.
Note: If the reset button on the HTML front end is used to restart the U8/16-IP all logging
information is saved permanently and is available after the U8/16-IP has been started. If the
U8/16-IP loses power or a hard reset is performed, all logging data will be lost. To avoid this,
use one of the log methods described below.
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SMTP Logging enabled
With this option, the U8/16-IP is able to send Emails to an address given by the Email address
text field in the Event Log Settings. These mails contain the same description strings as the
internal log file and the mail subject is filled with the event group of the occurred log event. In
order to use this log destination you have to specify an SMTP server that has to be reachable
from the U8/16-IP and that needs no authentication at all (<serverip>:<port>).
SNMP Logging enabled
If this is activated, the U8/16-IP sends an SNMP trap to a specified destination IP address every
time a log event occurs. If the receiver requires a community string, you can set it in the
appropriate text fie ld. Most of the event traps only contain one descriptive string with all
information about the log event. Only authentication and host power events have a trap class
that consists of several fields with detailed information about the occurred event. To receive
these SNMP traps, any SNMP trap listener may be used.
Warning In contrast to the internal log file on the U8/16-IP, the size of the NFS log file is not
limited. Every log event will be appended to the end of the file so it grows continuously, so you
may have to delete it or move it from time to time.