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GFK-2436M
Security Settings
Note: This information replaces the "Security Settings for the Ethernet Option Module" section in chapter
14 of GFK-1645J and will be included in the next revision of that manual.
Security settings are provided to prevent unauthorized access to the Ethernet Option Module configuration
mode.
Five security parameters are supported for the Ethernet Option Module (firmware versions 3.3 and later).
Security settings are provided for the three protocols: SNP/SRTP, Modbus TCP and Tunneling.
These parameters allow you to configure the Telnet password, enable the required ports and disable the
unused ports
Figure 19: Security Settings
Note: We strongly recommend configuration of the Telnet password and closing the unused ports. This will
reduce the exposure to security threats.
These ports are disabled by default. A port must be enabled if the application needs a service associated with
that port.
To upgrade firmware, the TFTP Download must be enabled. Be sure to disable TFTP Download after the
firmware update has been completed.
To connect with Device Installer, Port 77FE must be enabled.
For use as web server the configuration for Web Server must be enabled.
By default, Simple Network Management Protocol (SNMP) is Disabled.
For Modbus TCP and SRTP protocols, these security settings options are in the "Network/IP Settings" menu.
For Tunneling (Passthrough), these security settings are in "basic parameters/server" menu.
The maximum password length is 16 characters. These characters can be alphanumeric or special characters.
The password requires a minimum length of 8 characters.
A password set on a protocol's firmware remains in effect if the firmware is changed to that of a different
protocol. For example, if a password is set on Modbus TCP firmware and later the firmware is changed to
SNP/SRTP, the same password set on Modbus TCP firmware will still apply.
June 2023
17
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