User's Manual

Elpro Technologies 450U-E Wireless Ethernet Modem & Device Server User Manual
Rev Version 1.0.12-Beta7 www.cooperbussmann.com/wirelessresources 29
When all selections have been made the configuration needs to be saved and the module restarted by
WEP (128 bit)
WEP128 (Wired Equivalent Privacy) encryption is the weakest encryption method, defined by the original IEEE802.11
standard and uses a 104bit key with a 24bit initialization vector to give a 128bit WEP encryption level. WEP is not
considered an effective security scheme, and should only be used if it is necessary to interoperate with other equipment
which does not support more modern encryption methods.
Encryption Keys 1 to 4
These are the keys used to encrypt radio data to protect
data from unwanted eavesdroppers when WEP Encryption
is selected. These keys should be the same for all 450U-E
units in the same system.
WEP keys must be entered as pairs of hexadecimal digits
separated by colons. Hexadecimal digits are in the range
0...9 and A...F.
128bit WEP requires 26 Hexadecimal digits. For example,
12:AB:EF:00:56:15:6B:E4:30:C8:05:F0:8D for 128bit
encryption
Encryption keys must not be all zeros, i.e. 00:00:00:00:00
Default WEP Key
One of the four keys may be selected as the default key, and is used to encrypt transmitted messages from the
configured unit. A 450U-E can receive and decrypt a message from a module that has a different default key index as
long as each module has the same key configured at the same index.
WPA2
WPA2-PSK (AES) (Wi-Fi Protected Access 2) replaced WPA and provides significant security improvements over this
method. In particular, it introduces CCMP, a new AES-based encryption mode with strong security. WPA2 AES
(Advanced Encryption Standard) is the most secure encryption method, is also based on 128 bit encryption key.
When WPA Encryption is selected, 128bit Encryption keys are
internally generated based on the Passphrase and System
Address (ESSID). The Passphrase must be between 8 and 63
characters in length, and the Passphrase must be the same
for all 450U-E units in the same system.
For optimal security consider using a passphrase consisting of a combination of letters and numbers (i.e. not just a simple
word or phrase) as well as upper and lower case. E
WPA Enterprise
WPA-Enterprise (802.1x) removes the need to manage the Pre-shared Key (PSK) by using an external server to provide
client authentication. Clients that are not authorized will be prevented from accessing the network. Once a client has
Figure 31 - WEP
Figure 32 WPA2
Figure 30 - Security Menu