Motorola 3347 - Manual (Page 12)

12
Wide Area Network Termination
PPPoE/PPPoA (Point-to-Point Protocol over Ethernet/ATM)
The PPPoE specification, incorporating the PPP and Ethernet standards, allows your com-
puter(s) to connect to your Ser vice Provider’s network through your Ethernet WAN connec-
tion. The 2200 and 3300-series Gateway suppor ts PPPoE, eliminating the need to install
PPPoE client software on any LAN computers.
Ser vice Providers may require the use of PPP authentication protocols such as Challenge
Handshake Authentication Protocol (CHAP) or Password Authentication Protocol (PAP).
CHAP and PAP use a username and password pair to authenticate users with a PPP ser ver.
A CHAP authentication process works as follows:
1. The password is used to scramble a challenge string.
2. The password is a shared secret, known by both peers.
3. The unit sends the scrambled challenge back to the peer.
PAP, a less robust method of authentication, sends a username and password to a PPP
ser ver to be authenticated. PAP’s username and password pair are not encr ypted, and are
therefore sent “unscrambled”.
Instant-On PPP
You can configure your Gateway for one of two types of Internet connections:
• Always On
• Instant On
These selections provide either an uninterrupted Internet connection or an as-needed con-
nection.
While an Always On connection is convenient, it does leave your network permanently con-
nected to the Internet, and therefore potentially vulnerable to attacks.
Motorola Netopia®'s Instant On technology furnishes almost all the benefits of an Always-
On connection while providing two additional security benefits:
• Your network cannot be attacked when it is not connected.