System information

168 Chapter 4: Configuring Cisco VPN 3000 for Remote Access Using Preshared Keys
— 40-bit—Clients can use the RSA RC4 encryption algorithm using a 40-bit key
when this option is checked.
— 128-bit—Clients can use the RSA RC4 encryption algorithm using a 128-bit
key when this option is checked.
• PPTP Compression—If many of your clients connect via dial-up connections, you might
want to enable PPTP compression to decrease the amount of data being transferred. If
you enable compression, the Microsoft Point-to-Point Compression (MPPC) algorithm
is used.
• L2TP Authentication Protocols—L2TP authentication protocol options are the same as
the PPTP options previously discussed.
• L2TP Encryption—L2TP encryption options are the same as the PPTP options
previously discussed.
• L2TP Compression—L2TP compression options are the same as the PPTP options
previously discussed.
Figure 4-26 Configuration | User Management | Groups | Modify > PPTP/L2TP
chpt_04.fm Page 168 Friday, April 4, 2003 9:19 AM