User manual

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 HSA300A User Manual
Page 36 of 49
Copyright ©2003 BroadMax Technology Limited
• PPPoA / PPPoE
Connection protocols selected between PPPoA and PPPoE.
• NAT (Enable / Disable)
NAT (Network Address Translation) is required when a small local area
network is connected to an Internet, where the Internet connection
provides only a single IP address. It should be enable if the user wants
to share Internet access in a local network.
• VPI / VCI
The VPI (Virtual Path Identifier) and VCI (Virtual Circuit Identifier)
identifies an ATM virtual channel. These values are provided by
Internet service provider for connection between modems and ATM
devices such as DSLAMs.
• User Name
The User Name of the Internet account provided by Internet service
provider.
• Password
The password for the above account.
• Authentication Protocol (CHAP / PAP)
The Authentication Protocol provided by Internet service provider.
CHAP is set as default.
• Auto Connect
This option enable the modem to connect PPP automatically if
available.
• DHCP Server (Enable / Disable)
A DHCP (Dynamic Host Configuration Protocol) Server provides valid
IP addresses to DHCP Clients inside the network. It should be enable
if a user wants the modem to distribute IP addresses to PCs it
connects to. Please notice that only one DHCP Server is allowed
within a local network
Click Save to proceed after filling in the required information.
If DHCP Sever is enabled, the DHCP Server page is displayed for user to
input DHCP Server information. See section 6.12 for details.
If DHCP Server is not enabled, information is then saved into the modem.
See section 6.13 for details.
5.10 NAT Inbound page
The NAT protocol allows users to share an Internet access when only one
public IP address is available. However, not all applications can be accessed
behind NAT. NAT Inbound is needed to expose a certain application in the
private network to the public Internet.
The NAT Inbound configuration allows packets arriving on the WAN public IP
with a specific port number to be forwarded to a specific machine on the
private network. It is usually used in exposing a server inside a private
network, so that it can be accessed by the public Internet.