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5.11.1 ENABLE THE PPTP VPN SERVER
Select PPTP VPN on the Serial & Networks menu.
Click the Enable check box to enable the PPTP Server.
Select the Minimum Authentication Required.
FIGURE 5-35. SERIAL & NETWORK: PPTP VPN SCREEN
Access is denied to remote users attempting to connect using an authentication scheme weaker than the selected scheme. From
strongest to weakest, the schemes are:
- Encrypted Authentication (MS-CHAP v2). The strongest and recommended authentication option.
- Weakly Encrypted Authentication (CHAP). This is the weakest type of encrypted password authentication to use. It is not
recommended that clients connect using this as it provides very little password protection. Also note that clients connecting using
CHAP are unable to encrypt traffic.
- Unencrypted Authentication (PAP). This is plain text password authentication. When using this type of authentication, the client
password is transmitted unencrypted.
- None. No encryption at all.
Select the Required Encryption Level.
Access is denied to remote users attempting to connect not using this encryption level. 40-bit or 128-bit encryption is
recommended.
In Local Address enter the IP address to assign to the server’s end of the VPN connection.
In Remote Addresses enter the pool of IP addresses to assign to the incoming client’s VPN connections (for example, 192.168.1.10-
20).
These must be free IP addresses, from the network (typically the LAN) that remote users are assigned while connected to the Black
Box appliance.
Enter the desired value of the Maximum Transmission Unit (MTU) for the PPTP interfaces into the MTU field (defaults to 1400).
In the DNS Server field, enter the IP address of the DNS server that assigns IP addresses to connecting PPTP clients.
CHAPTER 5: SERIAL PORT, HOST DEVICE AND USER CONFIG
