AudioCodes MP-26 series, User Manual

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User's Manual 210 Document #: LTRT-23510
MP-26x/MP-27x Multimedia Home Gateway
Table 12-4: PPP Tab Parameter Descriptions
Parameter Description
On Demand Use PPP on demand to initiate the PPP session only when packets are
actually sent over the Internet.
Idle Time Before
Hanging Up Specify the amount of idle time (during which no data is sent or received) that
should elapse before the gateway disconnects the PPP connection.
Note: This parameter appears only if On Demand is selected.
Time Between
Reconnect
Attempts Specify the duration between PPP reconnected attempts, as provided by your
ISP.
PPP Authentication PPP supports four authentication protocols: Password Authentication Protocol
(PAP), Challenge Handshake Authentication Protocol (CHAP), Microsoft CHAP
version 1, and Microsoft CHAP version 2.
This section allows you to select the authentication protocols your device 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 performed only if 'Microsoft CHAP', 'Microsoft CHAP version 2', or
both are selected.

Login User Name: login username according to ISP

Login Password: login password according to ISP

Support Un-encrypted Password (PAP): PAP is a simple, plaintext
authentication scheme. The username and password are requested by your
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): 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 attempt.

Support Microsoft CHAP: Select this check box if you are communicating
with a peer that uses Microsoft CHAP authentication protocol.

Support Microsoft CHAP Version 2 : Select this check box if you are
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 point-
to-point link. It is also used to signal a failure of the compression/
decompression mechanism in a reliable manner. For each compression
algorithm, select one of the following from the drop down menu.

Reject: Reject PPP connections with peers that use the compression
algorithm.

Allow: Allow PPP connections with peers that use the compression
algorithm.

Require: Ensure a connection with a peer is using the compression
algorithm.