Lantronix SecureBox SDS2100 User Manual page 43

SDS2100 User Guide
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. The SDS supports 128-, 192-,
and 256-bit encryption key lengths.
6. When prompted to change keys, press Y.
7. At the Enter Keys prompts, 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.
8. Continue pressing Enter until you return to the Change Setup menu.
9. At 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:
Figure 3-14. Encryption Keys
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
Encrypted SDS-to-SDS communication. Be sure to configure both SDS
devices with the same encryption key.
Third-party application to SDS-encrypted communication: SDS 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 SDS. To ease the development process, Lantronix
provides an AES encryption DLL for Windows and protocol source code
samples. See the document "Encryption Enabling Serial Devices" on the
Lantronix web site (www.lantronix.com) for more instructions and sample
code.
43
3: Configuring the Unit