Symbol AP-51xx, Product Reference Manual, Page: 165 / 622

Network Management 5-21
5. Click Apply to save any changes to the WAN screen. Navigating away from the screen
without clicking the Apply button results in all changes to the screen being lost.
6. Click Undo Changes (if necessary) to undo any changes made. Undo Changes reverts the
settings displayed on the WAN screen to the last saved configuration.
7. Click Logout to securely exit the access point Symbol Access Point applet. A prompt
displays confirming the logout before the applet is closed.
5.2.1 Configuring Network Address Translation (NAT) Settings
Network Address Translation (NAT) converts an IP address in one network to a different IP address or
set of IP addresses in another network. The access point router maps its local (inside) network
addresses to WAN (outside) IP addresses, and translates the WAN IP addresses on incoming packets
to local IP addresses. NAT is useful because it allows the authentication of incoming and outgoing
Idle Time (seconds) Specify an idle time in seconds to limit how long the
access
point
’s WAN connection remains active after outbound and
inbound traffic is not detected. The Idle Time field is grayed out if
Keep-Alive is enabled.
Authentication Type Use the Authentication Type menu to specify the authentication
protocol(s) for the WAN connection. Choices include None, PAP or
CHAP, PAP, or CHAP.
Password Authentication Protocol (PAP) and Challenge Handshake
Authentication Protocol (CHAP) are competing identify-verification
methods.
PAP sends a username and password over a network to a server
that compares the username and password to a table of authorized
users. If the username and password are matched in the table,
server access is authorized. WatchGuard products do not support
the PAP protocol because the username and password are sent as
clear text that a hacker can read.
CHAP uses secret information and mathematical algorithms to
send a derived numeric value for login. The login server knows the
secret information and performs the same mathematical
operations to derive a numeric value. If the results match, server
access is authorized. After login, one of the numbers in the
mathematical operation is changed to secure the connection. This
prevents any intruder from trying to copy a valid authentication
session and replaying it later to log in.