Lantronix EMG 7500, Руководство пользователя

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7: Networking
EMG™ Edge Management Gateway User Guide 104
Security Suite Select the security suite used by the profile:
None : Select this to connect to a WLAN network with no security, e.g.
an open network that does not require a security token or password.
WEP : Select this to connect to a WLAN network that uses Wired
Equivalent Privacy security. WEP is a simple and efficient security
mode, encrypting the data using the RC4 algorithm with either 64 bit
encryption or 128 bit encryption. However, WEP has become more
vulnerable due to advances in hacking technology. State-of-the-art
equipment can find WEP keys in a few minutes.
WPA2/WPA Mixed Mode : select this to connect to a WLAN network
that uses WiFi Protected Access (WPA) security or WiFi Protected
Access II (WPA2) security. The EMG will accept either protocol when
connecting to an access point (WPA2 will be preferred over WPA). The
keys used by WPA and WPA2 are are are 256 bit, and the data is
encrypted with Temporal Key Integrity Protocol (TKIP) or Counter
Mode CBC-MAC Protocol (CCMP), an AES encryption suite. WPA2
with CCMP encryption is the preferred security suite, as it offers the
greatest level of security.
WEP Security Parameters If the WEP security suite is selected, these authentication parameters
can be selected and configured:
Authentication : Select Open for a connection that establishes without
first checking for matching encryption keys (if keys do not match, data
may be dropped or become garbled and prevent connectivity on the IP
level), or Shared for a connection that compares encryption keys of
both parties as a form of authentication (if mismatches occur, no
connection establishes). Note: Open authentication requires a
passphrase; this passphrase is used to encrypt the data, and is not
used for authentication.
Key Type: For WEP Shared authentication, select the type of key
required for the WLAN network: Passphrase for an ASCII password, or
Hex for a 40 bit or 104 bit hexadecimal key.
Key Size: For WEP Shared authentication, select the size of key
required for the WLAN network: 40 bit for 64 bit WEP, or 104 bit for 128
bit WEP. If you use a 40 bit key size, you need a key that is 5 ASCII
characters or 10 hex characters long; the 24 bit initialization vector (IV)
is added to the 40 bit long key to produce a 64 bit key. If you use a 104
bit key size, you need a key that is 13 ASCII characters or 26 hex
characters long; the 24 bit initialization vector is added to the 104 bit
long key to produce a 128 bit key. The initialization vector is not user
configurable.
Passphrase / Retype Passphrase: For WEP Shared authentication
with Passphrase, enter the ASCII passphrase required to authenticate
the connection. For Key Size of 40 bits, the passphrase must be 5
characters. For Key Size of 104 bits, the passphrase must be 13
characters. All printable characters may be used in the passphrase.
Transmit Key Index: For WEP Shared authentication with Hex keys,
select which of the 4 hex keys to use to encrypt the data that is
transmitted. For interoperability with some systems, this index must be
set to 1.
Key 1-4: For WEP Shared authentication with Hex keys, enter at least
1 and up to 4 hexadecimal keys. The keys should be exactly 10
hexadecimal characters for 64 bit WEP, and exactly 26 hexadecimal
characters for 128 bit WEP. The Show Keys checkbox can be used to
display the masked key.