6-26 CHAPTER 6: MANUAL SETUP
Packet filters control inter-network data transmission b y accepting or rejecting the
passage of specific packets through network interfaces based on packet header
information. When data packets are received by a network interface such as an
Ethernet (LAN) or WAN port, a packet filter analyzes the pack et information using
a set of rules you define. A filter then lets the pa cket pass through or discards it.
This chapter contains information on the filtering capabilities for your
OfficeConnect Remote 812. It is divided into the following sections:
Filtering Overview
OfficeConnect Remote 812 Filtering Capabiliti es
Creating Filters
Assigning Filters
Applying Filters
Managing Filters
Filtering Overview Filters can provide added security by accepting packet s only from specific
addresses or they can be added to reduce networ k traffic and improve overall
performance. Filters can also be used to approxima te spoofing when routers with
different or incompatible spoofing methods are linked over the WAN. Spoofing is
the use of a forged IP source address to circumvent a firewall.
Packet filters control inter-network data transmission b y accepting or rejecting the
passage of specific packets through network interfaces based on packet header
information. When data packets are received by a network interface such as an
Ethernet LAN or WAN port, a packet filter analyzes packet header information
against a set of rules you define. A filter then lets the packet pass through or
discards it.
OfficeConnect Remote 812 Filtering Capabilities
The OfficeConnect Remote 812 provides an extensiv e set of data and call filtering
capabilities. The OfficeConnect Remote 812 supports the following filtering
capabilities:
Input and output data filtering.
Source and destination address filtering.
Protocol filtering.
Source and destination port filtering. A pack et filter can control what services
local or remote users can access.
Call filtering can control whether a packe t can initiate an outgoing call.
Route filtering can filter source and destination addresse s in packets that
exchange routing table information.
Established session filtering. A packet filter can permit users to connect with a
remote network without letting remote users have access to the local network
(or vice versa).
Filter Classes The OfficeConnect Remote 812 supports three filter cla sses: