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3.17.5 Disable Port 77FE (Hex)
Note: If you choose to disable this option, keep in mind that disabling both Telnet Setup and Port 77FE will prevent
users from accessing the setup menu from the network.
Port 77FE is a setting that allows Device Installer, Web-manager, and custom programs to configure the unit
remotely. You may want to disable this capability for security purposes.
The default setting is the N (No) option, which enables remote configuration. You can configure the unit by
using Device Installer, web pages, Telnet, or serial configuration.
The Y (Yes) option disables remote configuration and web sites.
Note: The Y (Yes) option disables many of the GUI tools for configuring the unit, including the embedded Web-Manager
tool.
3.17.6 Disable Web Server
This setting defaults to the N (option). The Y (Yes) option disables web server.
3.17.7 Disable Web Setup
The Y (Yes) option disables configuration using the Web-Manager. This setting defaults to the N (option).
3.17.8 Disable ECHO Ports
Controls whether the serial port will echo characters it receives.
3.17.9 Enable Encryption
Rijndael is the block cipher algorithm chosen by the National Institute of Science and Technology (NIST) as
the Advanced Encryption Standard (AES) to be used by the US government. The NET485 supports 128-,
192-, and 256-bit encryption key lengths.
Note: Configuring encryption should be done through a local connection to the serial port of the NET485, or via a secured
network connection. Initial configuration information, including the encryption key, is sent in clear text over the network.
To configure AES encryption on the NET485:
1. When prompted to enable encryption, select Y.
2. When prompted, enter the encryption key length. The NET485 supports 128-, 192-, and 256-bit
encryption key lengths.
3. When prompted to change keys, select Y.
4. At the Enter Keys prompt, enter your encryption key. The encryption keys are entered in
hexadecimal. The hexadecimal values are echoed as asterisks to prevent onlookers from seeing the
key. Hexadecimal values are 0-9 and A-F.
For a 128-bit key length, enter 32 hexadecimal characters.
For a 192-bit key length, enter 48 hexadecimal characters.
For a 256-bit key length, enter 64 hexadecimal characters
5. Continue pressing Enter until you return to the Change Setup menu.
6. From the Change Setup menu, select option 9 to save and exit.
Encryption only applies to the port selected for data tunneling (default 10001), regardless of whether you are
using TCP or UDP.
NET485 User Guide 3-43