Configure
Note:
The Y (Yes) option disables many of the GUI tools for configuring the unit, including the embedded Web-Manager
tool.
3.16.6 Disable Web Server
This setting defaults to the N (option). The Y (Yes) option disables web server.
3.16.7 Disable Web Setup
The Y (Yes) option disables configuration using the Web-Manager. This setting defaults to the N (option).
3.16.8 Disable ECHO Ports
Controls whether the serial port will echo characters it receives.
3.16.9 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 NET232 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 NET232, 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 NET232:
1.
When prompted to enable encryption, select Y.
2.
When prompted, enter the encryption key length. The NET232 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.
Generally, one of two situations applies:
•
Encrypted NET232-to-NET232 communication. Be sure to configure both NET232 devices
with the same encryption key.
•
Third-party application to NET232-encrypted communication: NET232 uses standard AES
encryption protocols. To communicate successfully, products and applications on the peer
side must use the same protocols and the same encryption key as the NET232.
•
Lantronix Secure Com Port Redirector provides an encrypted connection from Windows-
based applications to the NET232. Information about SCPR is at
http://www.lantronix.com/device-networking/software-services/scpr.html
Note: Developers can license the Lantronix Encryption Library Suite. See http://www.lantronix.com/device-
networking/utilities-tools/.
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NET232/NETUSB User Guide
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