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Services
240 IOLAN SDS/SCS/STS/MDC User’s Guide, Version 4.0
Services
Overview
Services are either daemon or client processes that run on the IOLAN. You can disable any of the
services for security reasons.
Functionality
If you disable any of the daemons, it can affect how the IOLAN can be used or accessed. For
example, if you disable WebManager (HTTPS and HTTP) services, you will not be able to access the
IOLAN with the WebManager. If you disable the DeviceManager service, the DeviceManager will
not be able to connect to the IOLAN. If you do not want to allow users to Telnet to the IOLAN, you
can disable the Telnet Server service; therefore, disabling daemons can also be used as an added
security method for accessing the IOLAN.
By default, all daemon and client applications are enabled, except IPsec, and running on the IOLAN.
Field Descriptions
Enable/disable the following options:
Telnet Server Telnet daemon process in the IOLAN listening on TCP port 23.
Default: Enabled
TruePort Full
Mode
The TruePort daemon process in the IOLAN that supports TruePort Full Mode
on UDP port 668. You can still communicate with the IOLAN in Lite Mode
when this service is disabled.
Default: Enabled
Syslog Client Syslog client process in the IOLAN.
Default: Enabled
Modbus Modbus daemon process in the IOLAN listening on port 502.
Default: Enabled
SNMP SNMP daemon process in the IOLAN listening on port 161.
Default: Enabled