Enterasys Networks Network Card Click the Compression tab, Tunnel Parameter Explanation Protocol

Tunnel Protocols	Chapter 3
	Configuring an ANG-3000/7000

	Table 3	Encryption Parameters
Tunnel	Parameter		Explanation
Protocol
IPSec	None		Disables encryption on the tunnel; because this results
			in a less secure connection, this setting is not
			recommended.
	ARCFOUR 40 bit		Enables a 40-bit key public domain algorithm that is
			designed to work with Rivest Cipher 4 (RC4), a
			stream-based cipher method that supports both 40-bit
			and 128-bit keys. Using RC4, data packets can be
			encrypted as they are received instead of in blocks.
	ARCFOUR 128 bit		Enables a 128-bit key version of ARCFOUR (described
			above).
	DES		Enables Data Encryption Standard (DES), a block
			cipher method that uses 56-bit keys. Using DES, data is
			encrypted in fixed-size blocks and packets are padded
			to become a multiple of the block size.
	Triple-DES		Enables a version of DES (described above) that
			employs a DES encryption with one key, a decryption
			with a second key, and then another encryption with a
			third key. The result is equivalent to DES with a 112-bit
			key.
PPTP	MPPE (40 bit)		Enables 40-bit key Microsoft Point-to-Point Encryption
			(MPPE) which generates a key based on a hash of the
			user’s password and invokes RC4 encryption. This type
			of encryption is supported by
			Windows 95/98/NT/2000/ME computers without any
			additional software.
	MPPE (128 bit)		Enables 128-bit key MPPE on the tunnel. To support
			128-bit keys, the Aurorean computer must receive a
			128-bit encryption upgrade available from Microsoft.
			This upgrade may not be available to users outside the
			U.S.

10Click the Compression tab.

48 RiverMaster Administrator’s Guide