Actiontec MI424WR User Guide - Page 71
Password Authentication Protocol, Challenge Handshake, Microsoft CHAP versions 1 and 2
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Actiontec Wireless Broadband Router User Manual PPP Authentication Point-to-Point Protocol (PPP) currently supports four authentication protocols: Password Authentication Protocol (PAP), Challenge Handshake Authentication Protocol (CHAP), and Microsoft CHAP versions 1 and 2. Select the authentication protocols the Router may use when negotiating with a PPTP server in this section. Select all the protocols if no information is available about the server's authentication methods. Note that encryption is performed only if Microsoft CHAP, Microsoft CHAP version 2, or both are selected. MWarning: The PPP Authentication settings should not be changed unless instructed to do so by Verizon. Login User Name Enter the user name (provided by the ISP) in this text box. Login Password Enter the password (provided by the ISP) in this text box. Support Unencrypted Password (PAP) Password Authentication Protocol (PAP) is a simple, plain-text authentication scheme. The user name and password are requested by the networking peer in plain-text. PAP, however, is not a secure authentication 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) Click in this check box to activate CHAP, 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 attempt. Support Microsoft CHAP Click in this check box if communicating with a peer that uses Microsoft CHAP authentication protocol. Support Microsoft CHAP Version 2 Select this check box if communicating with a peer that uses Microsoft CHAP Version 2 authentication protocol. PPP Compression The PPP Compression Control Protocol (CCP) is responsible for configuring, enabling, and disabling data compression algorithms on both ends of the pointto-point link. It is also used to signal a failure of the compression/ decompression mechanism in a reliable manner. 68