- ARESCOM NetDSL 800 ADSL Modem version 5.2b1 User's Guide

Terminology for Configuration Parameters
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NetDSL Software User’s Guide
discriminate between different virtual connections and ATM nodes.
Virtual Channel Identifier
Each connection in an ATM network is characterized by a Virtual Channel (VC).
This is a header subfield that is assigned manually when NetDSL is used. A VC
has only local significance on the link between ATM nodes. When the connection
is released, the VC value on the involved links will be released and can be reused
by other connections.
Bridge Packet Filtering
Establishing Bridge packet filters allows you to monitor and selectively filter
packets that enter or leave the NetDSL. You can use filtering to protect your
network from unauthorized access, and restrict certain web traffic from leaving
your LAN. This is done by examining each packet that enters the NetDSL to see
if the following characteristics match the criteria for the filter (true), or whether
they do not match (false):
MAC: Identifies each device on the network and the Internet
For either true/false condition, the following packet dispositions can be set:
Pass: automatically pass through the modem
Restrict: pass only if there is an available connection
Discard: packet is blocked and discarded
Pass to next filter: packet goes to the next filter in sequence
The IP Packet Filtering allows for up to 32 sequential filters, and each filter can
be set to examine source packets, destination packets, or both.