Enterasys Networks Network Card manual Click the Compression tab, 226

Configuring Tunnel Protocols	Appendix B
	ANG-3000/7000 Preconfiguration Stored on a Floppy Disk

	Table 19	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.
	MPPE (128 bit)	Enables 128-bit key MPPE on the tunnel. .

6Click the Compression tab.

The Compression properties screen appears as shown in Figure 126.

226 RiverMaster Administrator’s Guide