D-Link DWC-1000 DWC-1000 User's Guide - Page 116

VPN Settings Field Enable PPTP Server Nat Classical Starting IP Address Ending IP Address PAP CHAP MS-CHAP Table 6-5. Fields on the PPTP SERVER Page Description PPTP Client Configuration Enables or disable the PPTP server. Choices are: • Checked = enable PPTP server. • Unchecked = disable PPTP server. PPTP Routing Mode NAT is a technique that allows several computers on a LAN to share an Internet connection. The computers on the LAN use a "private" IP address range while the Option port on the router is configured with a single "public" IP address. Along with connection sharing, NAT also hides internal IP addresses from the computers on the Internet. Select NAT if your ISP has assigned only one IP address to you. The computers that connect through the router will need to be assigned IP addresses from a private subnet (for example:,192.168.10.0). Enables or disables classical routing. Choices are: • Checked = enable classical routing. IP addresses on the LAN will be exposed and be in the same subnet as the Option. If your ISP assigned an IP address for every computer you use, select this option. • Unchecked = disable classical routing. Enter the range of IP addresses that is allocated to PPTP Clients Enter the starting IP address of the range of IP addresses to assign to connecting users. This IP address is taken as the server IP address and rest of the addresses in the range are assigned to clients. Enter the ending IP address of the range of IP addresses to assign to connecting users. Authentication Supported Enables or disables support for Password Authentication Protocol (PAP) authentication method. PAP is a 2-way handshake protocol designed for use with PPP. Password Authentication Protocol is a plain text password used on older SLIP systems. It is not secure. Choices are: • Checked = enable support for PAP. • Unchecked = disable support for PAP. Enables or disables support for Challenge Handshake Authentication Protocol (CHAP) authentication method. CHAP is a 3-way handshake protocol that is considered more secure than PAP. Choices are: • Checked = enable support for CHAP. • Unchecked = disable support for CHAP. Enables or disables support for MS-CHAP authentication method. MS-CHAP uses a Microsoft version of RSA Message Digest 4 challenge-and-reply protocol. This only works on Microsoft systems and enables data encryption. To select this authentication method causes all data to be encrypted. Choices are: • Checked = enable support for MS-CHAP. • Unchecked = disable support for MS-CHAP. 116 DWC-1000 Wireless Controller User's Guide