ZyXEL Communications Prestige 794M - Manual (Page 82)

Prestige 794M User’s Guide
Chapter 7 VPN 82
Netmask This field is applicable when you select Dial In in the Type field.
Enter the subnet mask (in dotted decimal) notation to assign to the remote VPN
client that initiates this VPN connection. For example, 255.255.255.0.
Peer Network IP Enter the IP address (in dotted decimal notation) of the remote network. For
example, 192.168.1.1.
Username If you select Dial Out in the Type field, enter the username provided.
If you select Dial In in the Type field, enter a username to be used when
establishing a VPN connection.
Password Enter the password associated with the username above.
PPP
Authentication
Type
Specify the authentication type to use when accepting or establishing a VPN
connection. Choices are PAP (Password Authentication Protocol) and CHAP
(Challenge Handshake Authentication Protocol). The default is CHAP.
When you select PAP, password is sent unencrypted. While CHAP provides better
security by encrypting the password before transmission and reauthenticates the
VPN client to protect against identity theft.
Data Encryption You can set the Prestige to encrypt data sent over the VPN connection using
MPPE (Microsoft Point to Point Encryption).
Select Auto to set the Prestige to automatically detect whether the remote VPN
device uses data encryption.
Select Enable to activate data encryption on the Prestige. Make sure the remote
VPN device also has data encryption activated with the same encryption settings
as the Prestige.
Select Disable to deactivate data encryption on the Prestige. You cannot establish
a VPN connection if data encryption in enabled on the remote VPN device.
Key Length Specify the key length for data encryption. Choices are Auto, 40 bits and 128
bits.
Select Auto to set the Prestige to automatically detect the key length used by the
remote VPN device.
Otherwise select 40 bits or 128 bits (for stronger encryption) to set the key length
manually.
Note: Make sure the key length is the same on the Prestige and the
remote VPN device.
Mode Specify the encryption mode. Choices are Stateful and Stateless.
Select Stateful to use a different encryption key after 256 packets of data
transmitted.
Select Stateless to use a different encryption key for each packet.
Idle Time Specify the time interval in minutes (where there is no traffic between the Prestige
and the computer) that can elapse before the Prestige automatically disconnects
the connection.
Enter 0 to allow connection up all the time.
Apply Click Apply to save the changes.
Table 42 VPN PPTP: LAN to LAN Connection (continued)
LABEL DESCRIPTION