User`s guide

74
Option
Description
ATM
Routed IP LLC
RFC 1483 LLC encapsulated routed IP over
ATM
To use PPPoA or PPPoE encapsulation, one of the available PPP instances must first be
configured to use this APVC instance as its Layer 1 interface on the associated
Configuration – Interfaces
> PPP > PPP n > Advanced page.
VPI
This parameter is used to set the Virtual Path Identifier for this APVC in the range 0 -
255.
VCI
This parameter is used to set the Virtual Channel Identifier for this APVC in the range 0 -
65535.
Entity
Instance
Parameter
Values
Equivalent Web Parameter
apvc 0 vpi 0-255 VPI
apvc 0 vci 0-65535 VCI
DSL Network Settings
Configuration – Network > Interfaces > DSL> DSL Network Settings
This DSL PVC is using PPP 1
The default interface for DSL is PPP 1
Description
Enter a description for the DSL if required
Username
Enter ADSL Username
Password
Enter the password for the DSL account
Confirm password
Enter the password for the DSL account
Enable NAT on this interface
This parameter is used to select whether IP Network Address Translation (NAT) or Network
Address and Port Translation (NAPT) are used at the Ethernet interface. When the
parameter is set to disabled, no NAT will take place. When this parameter is enabled, extra
options described below will be displayed.
NAT and NAPT can have many uses but they are generally used to allow a number of private
IP hosts (PCs for example) to connect to the Internet through a single shared public IP
address. This has two main advantages, it saves on IP address space (the ISP only need
assign you one IP address), and it isolates the private IP hosts from the Internet, effectively
providing a simple firewall because unsolicited traffic from the Internet cannot be routed
directly to the private IP hosts.
To use NAT or NAPT correctly in the example of connecting private hosts to the Internet,
NAT or NAPT should be enabled on the router’s WAN side interface and should be disabled
on the router’s LAN side interface.