Lantronix XPort User Manual download pdf (Page 42)

4: Using Setup Mode for Configuration

XPort™ User Guide 42

Encryption only applies to the port selected for tunneling (default 10001), regardless

of whether you are using TCP or UDP.

Generally, one of two situations applies.

 Encrypted XPort-to-XPort communication (and in the future, XPort

communication to other Lantronix device servers) is supported without extra

effort.

 The XPort uses standard AES encryption protocols. To communicate

successfully, products and applications on the peer side must use the same

protocols and the same shared key as the XPort. To ease the development

process, Lantronix provides an AES encryption DLL for Windows and

protocol source code samples. See the document entitled Encryption

Enabling Your Serial Device on the Lantronix web site (www.lantronix.com

)

for more instructions and sample code.

The following export agreement is required for the optional encryption:

I agree that I will not export or re-export this software file to a national

resident of Cuba, Iran, Iraq, Libya, North Korea, Sudan, Syria or any other

country to which the United States has embargoed goods; or to anyone on

the US Treasury Department's list of Specially Designated Nationals and

Blocked Persons, US Commerce Department's Table of Denial Orders and

Entitles List, or the US State Department's Debarred List. By receiving this

software, I am agreeing to the foregoing and I am representing and

warranting that I am not located in, under the control of, or a national or

resident of any such country or on any such list.

Encryption Tutorial

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 XPort supports 128, 192 and 256 bit encryption key lengths.

Follow the steps below to configure AES encryption on the XPort.

Note: Configuring encryption should be done through a local connection to

the serial port of the XPort, or via a secured network connection. Initial

configuration information including the encryption key is sent in clear text

over the network.

1. Telnet to the configuration port on the XPort (Port 9999).

Example Telnet command syntax is shown below. In the command examples

below, replace the x's with the IP address of the XPort.

Microsoft Windows command syntax: telnet xxx.xxx.xxx.xxx 9999 Unix

command syntax: telnet xxx.xxx.xxx.xxx:9999

2. When prompted, press Enter to go into Setup Mode.

3. At the Change Setup menu, select option 6 for security.

4. When prompted to enable encryption, press Y.

5. Enter the encryption key length when prompted. XPort supports 128-, 192- and

256-bit encryption key lengths.

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Lantronix XPort User Manual Page 42

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