Technical information

Watson SHDSL Router
Web-based Management Manual
Watson-SHDSL-Router-GUI-Manual.doc
Version 2.3-03
9-46
Revision: 2012-02-29
PPP-on-Demand Use PPP on demand to initiate the point-to-point protocol ses-
sion only when packets are actually sent over the Internet.
Time Between Reconnect Attempts Specify the duration between PPP recon-
nected attempts, as provided by your ISP.
Figure 9-65: PPP Configuration
PPP Authentication Point-to-Point Protocol (PPP) currently supports four
authentication protocols: Password Authentication Protocol (PAP), Challenge
Handshake Authentication Protocol (CHAP), and Microsoft CHAP version 1 and 2.
This section allows you to select the authentication protocols your gateway may
use when negotiating with a PPTP server. Select all the protocols if no information
is available about the server's authentication protocols. Note that encryption is per-
formed only if 'Microsoft CHAP', 'Microsoft CHAP version 2', or both are selected.
Figure 9-66: PPP Authentication
Login User Name As agreed with ISP.
Login Password As agreed with ISP.
Support Unencrypted Password (PAP) Password Authentication Protocol (PAP)
is a simple, plain-text authentication scheme. The user name and password are re-
quested by your networking peer in plain-text. PAP, however, is not a secure au-
thentication protocol. Man-in-the-middle attacks can easily determine the remote
access client's password. PAP offers no protection against replay attacks, remote
client impersonation, or remote server impersonation.
Support Challenge Handshake Authentication (CHAP) The Challenge
Handshake Authentication Protocol (CHAP) is a challenge-response authentication
protocol that uses MD5 to hash the response to a challenge. CHAP protects
against replay attacks by using an arbitrary challenge string per authentication at-
tempt.
Support Microsoft CHAP Select this check box if you are communicating with a
peer that uses Microsoft CHAP authentication protocol.