User's Manual

Table Of Contents
39
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 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 (BSD and Deflate), select one of the following from the drop-down list:
Reject Selecting this option rejects PPP connections with peers that use the compression algorithm. If Reject
is activated, throughput may diminish.
Allow Selecting this option allows PPP connections with peers that use the compression algorithm.
Require Selecting this option insures a connection with a peer using the compression algorithm.
Internet Protocol
Select one of the following Internet Protocol options from the “Internet Protocol” drop-down list:
Obtain an IP Address Automatically This option is selected by default. Change only if required by the ISP. The
server that assigns the TG590 Router with an IP address also assigns a subnet mask. Override the
dynamically assigned subnet mask by selecting the “Override Subnet Mask” and entering a different subnet
mask.
Use the Following IP Address Select this option to configure the TG590 to use a permanent (static) IP address.
The ISP should provide this address.
DNS Server
The Domain Name System (DNS) is the method by which website or domain names are translated into IP
addresses. The TG590 Router can be configured to automatically obtain a DNS server address, or the address