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User guide

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A data log filename includes the name of the appliance and/or target device, plus the system
data and time when the file was created. Current files have a .txt file name extension. If a port
supports session sharing, concurrent sessions on that port will be written to a single log file.
Data log files are not backed up by the DSView software backup utility.
When a data log file is created, a companion signature file with the same name is created, but
with a .sig file name extension. This file is digitally signed using the DSView software private
key. When a user wants to display the content of a data log file, the DSView software will first
verify the digital signature to ensure the file has not been altered.
You may also export the DSView system X.509 certificate and use its public key to validate
the signature of files, using external tools. See System certificate and SSH key on page 51.
Data log licenses
A data log license is used for each enabled data log port connection. A direct SSH/Telnet
session to an appliance will not require or use a data log license for the DSView software to
capture data logs for that appliance session. Only sessions related to appliance ports require a
data log license.
A data log license is used when data logging is enabled on a port connection. When data
logging is disabled on a port connection, that license is freed and returned to the available
pool.
The DSView software ships with 32 available data log licenses - that is, 32 data logging
sessions may be enabled on appliance connections that support data logging. An add-on license
key may be obtained to support a certain number of additional data logging sessions or an
unlimited number of data logging sessions (site license). See Licenses on page 60 for more
information.
Configuring Data Logging
Complete the following steps to configure DSView software data logging.
• Make sure you have sufficient data log licenses - one per port connection for which you
want to log session data; see Data log licenses on page 210.
• Enable the SSH server; see Enabling the SSH server on page 211.
• Enable the Syslog server; see Enabling the Syslog server on page 212.
• Enable data logging on appliance and/or target device connections; see Enabling and
disabling data logging on units on page 212.
210 DSView™ 4 Installer/User Guide