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Prestige 324 User's Guide Chapter 23 Filter Configuration This chapter shows you how to create and apply filters. 23.1 Introduction to Filters Your Prestige uses filters to decide whether to allow passage of a data packet and/or to make a call. There are two types of filter applications: data filtering and call filtering. Filters are subdivided into device and protocol filters, which are discussed later. Data filtering screens the data to determine if the packet should be allowed to pass. Data filters are divided into incoming and outgoing filters, depending on the direction of the packet relative to a port. Data filtering can be applied on either the WAN side or the LAN side. Call filtering is used to determine if a packet should be allowed to trigger a call. Remote node call filtering is only applicable when using PPPoE encapsulation. Outgoing packets must undergo data filtering before they encounter call filtering as shown in the following figure. Filter Configuration 23-1

Section	Page
Copyright	2
Copyright © 2003 by ZyXEL Communications Corpora	2
Disclaimer	2
Trademarks	2
Federal Communications Commission (FCC) Interference Statement	3
Notice 1	3
Certifications	3
Information for Canadian Users	4
Caution	4
Note	4
ZyXEL Limited Warranty	5
NOTE	5
Customer Support	6
List of Figures	17
List of Tables	23
Preface	27
About This User's Manual	27
Related Documentation	27
User’s Guide Feedback	27
Syntax Conventions	27
Part1.pdf	31
Prestige Internet Security Gateway Overview	31
Prestige Features	31
Applications for the Prestige	34
Introducing the Web Configurator	37
Web Configurator Overview	37
Accessing the Prestige Web Configurator	37
Resetting the Prestige	38
Navigating the Prestige Web Configurator	38
Wizard Setup	43
Wizard Setup Overview	43
Wizard Setup: General Setup and System Name	43
Wizard Setup: Screen 2	44
Wizard Setup: Screen 3	50
Basic Setup Complete	53
Part2.pdf	55
System Overview	55
Configuring General Setup	55
Dynamic DNS	56
Configuring Dynamic DNS	57
Configuring Password	58
Configuring Time Setting	59
LAN Screens	63
LAN Overview	63
DHCP Setup	63
LAN TCP/IP	63
Configuring IP	65
Configuring IP Alias	68
WAN Screens	71
WAN Overview	71
TCP/IP Priority (Metric)	71
WAN IP Address Assignment	71
Configuring Route	72
Configuring WAN ISP	73
Configuring WAN IP	79
Configuring WAN MAC	83
Traffic Redirect	84
Configuring Traffic Redirect	85
Configuring Dial Backup	86
Advanced Modem Setup	91
Configuring Advanced Modem Setup	92
Part3.pdf	97
NAT Overview	97
Using NAT	102
SUA Server	102
Configuring SUA Server	104
Configuring Address Mapping	106
Trigger Port Forwarding	109
Configuring Trigger Port Forwarding	110
Static Route Screens	113
Static Route Overview	113
Configuring IP Static Route	113
Part4.pdf	118
Universal Plug and Play Overview	118
UPnP and ZyXEL	119
Configuring UPnP	119
Installing UPnP in Windows Example	121
Using UPnP in Windows XP Example	123
Firewall	128
Introduction	128
Firewall Settings Screen	130
The Firewall, NAT and Remote Management	132
Configuring Content Filtering	133
Services	135
Part5.pdf	141
Remote Management Overview	141
Configuring WWW	142
Configuring Telnet	144
Configuring TELNET	144
Configuring FTP	145
SNMP	146
Configuring DNS	150
Configuring Security	151
Part6.pdf	155
View Log	155
Log Settings	156
Maintenance	161
Maintenance Overview	161
Status Screen	161
DHCP Table Screen	164
F/W Upload Screen	165
Configuration Screen	167
Restart Screen	170
Part7.pdf	173
SMT Introduction	173
Navigating the SMT Interface	175
Changing the System Password	178
Menu 1 General Setup	179
General Setup	179
Procedure To Configure Menu 1	179
WAN and Dial Backup Setup	185
Introduction to WAN	185
Dial Backup	186
Configuring Dial Backup in Menu 2	186
Advanced WAN Setup	187
Remote Node Profile (Backup ISP)	189
Editing PPP Options	192
Editing TCP/IP Options	193
Editing Login Script	195
Remote Node Filter	196
Menu 3 LAN Setup	199
LAN Setup	199
Protocol Dependent Ethernet Setup	200
TCP/IP Ethernet Setup and DHCP	200
Internet Access	205
Introduction to Internet Access Setup	205
Ethernet Encapsulation	205
Configuring the PPTP Client	207
Configuring the PPPoE Client	208
Basic Setup Complete	209
Remote Node Configuration	211
Introduction to Remote Node Setup	211
Remote Node Profile Setup	211
Edit IP	217
Remote Node Filter	219
Static Route Setup	223
IP Static Route Setup	223
Network Address Translation (NAT)	227
Using NAT	227
Applying NAT	227
NAT Setup	229
Configuring a Server behind NAT	235
General NAT Examples	236
Configuring Trigger Port Forwarding	244
Enabling the Firewall	247
Remote Management and the Firewall	247
Access Methods	247
Enabling the Firewall	247
Part8.pdf	250
Introduction to Filters	250
Configuring a Filter Set	253
Example Filter	262
Filter Types and NAT	264
Firewall Versus Filters	265
Applying a Filter	265
SNMP Configuration	268
About SNMP	268
Supported MIBs	269
SNMP Configuration	269
SNMP Traps	271
System Information and Diagnosis	272
System Status	272
System Information	274
Log and Trace	276
Diagnostic	280
Firmware and Configuration File Maintenance	284
Filename Conventions	284
Backup Configuration	285
Restore Configuration	289
Uploading Firmware and Configuration Files	291
System Maintenance	296
Command Interpreter Mode	296
Call Control Support	297
Time and Date Setting	299
Remote Management	304
Remote Management	304
Call Scheduling	306
Introduction to Call Scheduling	306
Part9.pdf	312
PPTP	316
NetBIOS Filter Commands	320
Log Descriptions	324
Setting up Your Computer’s IP Address	328
Brute-Force Password Guessing Protection	342
Triangle Route	344

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Prestige 324 User’s Guide

Filter Configuration

23-1

Chapter 23

Filter Configuration

This chapter shows you how to create and apply filters.

23.1 Introduction to Filters

Your Prestige uses filters to decide whether to allow passage of a data packet and/or to make a call. There are

two types of filter applications: data filtering and call filtering. Filters are subdivided into device and protocol

filters, which are discussed later.

Data filtering screens the data to determine if the packet should be allowed to pass. Data filters are divided

into incoming and outgoing filters, depending on the direction of the packet relative to a port. Data filtering

can be applied on either the WAN side or the LAN side. Call filtering is used to determine if a packet should

be allowed to trigger a call. Remote node call filtering is only applicable when using PPPoE encapsulation.

Outgoing packets must undergo data filtering before they encounter call filtering as shown in the following

figure.