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ZyXEL Communications 91-009-073003B manual 582

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Chapter 34 Anti-Spam

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582	ZyWALL USG 50 User’s Guide

Contents

Default Login Details www.zyxel.com Page About This User's Guide Page Page Document Conventions Page Safety Warnings Contents Overview Page Table of Contents Page Page Part II: Technical Reference Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Introducing the ZyWALL 1.1 Overview and Key Default Settings 1.2 Rack-mountedInstallation 1.2.1Rack-MountedInstallation Procedure 1.3 Front Panel 1.3.1 Front Panel LEDs 1.4 Management Overview 1.5 Starting and Stopping the ZyWALL Page Features and Applications 2.1 Features Page 2.2 Applications 2.2.1 VPN Connectivity 2.2.2 SSL VPN Network Access 2.2.2.1 Full Tunnel Mode 2.2.3 User-AwareAccess Control 2.2.4 Multiple WAN Interfaces Web Configurator 3.1 Web Configurator Requirements 3.2Web Configurator Access Page 3.3 Web Configurator Screens Overview 3.3.1Title Bar 3.3.1.1 About 3.3.2 Navigation Panel 3.3.2.3 Configuration Menu Page Page Page 3.3.3 Main Window 3.3.3.2 Site Map 3.3.3.3 Object Reference 3.3.4 Tables and Lists 3.3.4.1 Manipulating Table Display Page 3.3.4.2 Working with Table Entries 3.3.4.3 Working with Lists Page Installation Setup Wizard 4.1 Installation Setup Wizard Screens 4.1.1Internet Access Setup - WAN Interface 4.1.2Internet Access: Ethernet Page 4.1.3 Internet Access: PPPoE 4.1.4 Internet Access: PPTP 4.1.5ISP Parameters 4.1.6 Internet Access Setup - Second WAN Interface 4.1.7 Internet Access - Finish 4.2 Device Registration Page Page Quick Setup 5.1 Quick Setup Overview 5.2 WAN Interface Quick Setup 5.2.1 Choose an Ethernet Interface 5.2.2 Select WAN Type 5.2.3 Configure WAN Settings 5.2.4WAN and ISP Connection Settings Page 5.2.5 Quick Setup Interface Wizard: Summary 5.3 VPN Quick Setup 5.4 VPN Setup Wizard: Wizard Type 5.5 VPN Express Wizard - Scenario 5.5.1 VPN Express Wizard - Configuration 5.5.2 VPN Express Wizard - Summary 5.5.3 VPN Express Wizard - Finish 5.5.4 VPN Advanced Wizard - Scenario 5.5.5VPN Advanced Wizard - Phase 1 Settings Page 5.5.6 VPN Advanced Wizard - Phase 5.5.7 VPN Advanced Wizard - Summary 5.5.8 VPN Advanced Wizard - Finish Configuration Basics 6.1Object-basedConfiguration 6.2 Zones, Interfaces, and Physical Ports 6.2.1 Interface Types 6.2.2Default Interface and Zone Configuration Page 6.3 Terminology in the ZyWALL 6.4 Packet Flow 6.4.1Routing Table Checking Flow Page 6.4.2NAT Table Checking Flow 6.5Feature Configuration Overview 6.5.1 Feature 6.5.2 Licensing Registration 6.5.3 Licensing Update 6.5.4 Interface 6.5.5 Trunks 6.5.6 Policy Routes 6.5.7 Static Routes 6.5.8 Zones 6.5.9 DDNS 6.5.10 NAT 6.5.11 HTTP Redirect 6.5.12 ALG 6.5.13 Auth. Policy 6.5.14 Firewall 6.5.15 IPSec VPN 6.5.16 SSL VPN 6.5.17 Application Patrol 6.5.18 Anti-Virus 6.5.19 IDP 6.5.20 ADP 6.5.21 Content Filter 6.5.22 Anti-Spam 6.6 Objects 6.6.1 User/Group 6.7 System 6.7.1 DNS, WWW, SSH, TELNET, FTP, SNMP, Vantage CNM 6.7.2Logs and Reports 6.7.3 File Manager 6.7.4 Diagnostics 6.7.5 Shutdown Tutorials 7.1How to Configure Interfaces, Port Roles, and Zones 7.1.1 Configure a WAN Ethernet Interface 7.1.2 Configure Port Roles 7.1.3 Configure the DMZ Interface for a Local Network 7.1.4 Configure Zones 7.2 How to Configure a Cellular Interface Page 7.3How to Configure Load Balancing 7.3.1 Set Up Available Bandwidth on Ethernet Interfaces 7.3.2Configure the WAN Trunk Page 7.4 How to Set Up an IPSec VPN Tunnel 7.4.1 Set Up the VPN Gateway 7.4.2 Set Up the VPN Connection 7.4.3Configure Security Policies for the VPN Tunnel 7.5 How to Configure User-awareAccess Control 7.5.1 Set Up User Accounts 7.5.2Set Up User Groups 7.5.3Set Up User Authentication Using the RADIUS Server Page 7.5.4 Web Surfing Policies With Bandwidth Restrictions Page Page 7.5.5 Set Up MSN Policies 7.5.6Set Up Firewall Rules 7.6How to Use a RADIUS Server to Authenticate User Accounts based on Groups Page 7.7How to Use Endpoint Security and Authentication Policies 7.7.1 Configure the Endpoint Security Objects Page 7.7.2 Configure the Authentication Policy 7.8 How to Configure Service Control 7.8.1 Allow HTTPS Administrator Access Only From the LAN Page 7.9How to Allow Incoming H.323 Peer-to-peerCalls 7.9.1 Turn On the ALG 7.9.2 Set Up a NAT Policy For H.323 Page 7.9.3 Set Up a Firewall Rule For H.323 7.10 How to Allow Public Access to a Web Server 7.10.1 Create the Address Objects 7.10.2 Configure NAT 7.10.3 Set Up a Firewall Rule 7.11 How to Use an IPPBX on the DMZ Page 7.11.1 Turn On the ALG 7.11.2 Create the Address Objects 7.11.3 Setup a NAT Policy for the IPPBX 7.11.4 Set Up a WAN to DMZ Firewall Rule for SIP 7.11.5 Set Up a DMZ to LAN Firewall Rule for SIP 7.12How to Use Multiple Static Public WAN IP Addresses for LAN to WAN Traffic 7.12.1 Create the Public IP Address Range Object 7.12.2 Configure the Policy Route Page Page Page Dashboard 8.1 Overview 8.1.1 What You Can Do in this Chapter 8.2The Dashboard Screen Page Page Page Page 8.2.1 The CPU Usage Screen 8.2.2 The Memory Usage Screen 8.2.3 The Active Sessions Screen 8.2.4 The VPN Status Screen 8.2.5 The DHCP Table Screen 8.2.6 The Number of Login Users Screen Page Page Monitor 9.1 Overview 9.1.1 What You Can Do in this Chapter 9.2The Port Statistics Screen Page 9.2.1 The Port Statistics Graph Screen 9.3 Interface Status Screen Page 9.4 The Traffic Statistics Screen Page Page 9.5 The Session Monitor Screen Page Page 9.6 The DDNS Status Screen 9.7 IP/MAC Binding Monitor 9.8 The Login Users Screen 9.9 Cellular Status Screen Page 9.9.1 More Information 9.10 Application Patrol Statistics 9.10.1 Application Patrol Statistics: General Setup 9.10.2 Application Patrol Statistics: Bandwidth Statistics 9.10.3 Application Patrol Statistics: Protocol Statistics 9.10.4Application Patrol Statistics: Individual Protocol Statistics by Rule 9.11 The IPSec Monitor Screen 9.11.1 Regular Expressions in Searching IPSec SAs 9.12 The SSL Connection Monitor Screen 9.13 The Anti-VirusStatistics Screen Page 9.14 The IDP Statistics Screen Page 9.15 The Content Filter Statistics Screen Page 9.16 Content Filter Cache Screen Page Page 9.17 The Anti-SpamStatistics Screen Page 9.18 The Anti-SpamStatus Screen 9.19 Log Screen Page Page Registration 10.1 Overview 10.1.1What You Can Do in this Chapter 10.1.2What you Need to Know Page 10.2 The Registration Screen Page 10.3 The Service Screen Page Interfaces 11.1 Interface Overview 11.1.1What You Can Do in this Chapter 11.1.2 What You Need to Know Page 11.2Port Role 11.3 Ethernet Summary Screen Page 11.3.1 Ethernet Edit Page Page Page Page Page Page Page Page 11.3.2 Object References 11.4 PPP Interfaces 11.4.1 PPP Interface Summary 11.4.2 PPP Interface Add or Edit Page Page Page 11.5 Cellular Configuration Screen (3G) Page 11.5.1 Cellular Add/Edit Screen Page Page Page Page Page Page 11.6 VLAN Interfaces Page 11.6.1 VLAN Summary Screen 11.6.2 VLAN Add/Edit Page Page Page Page Page Page 11.7 Bridge Interfaces Page 11.7.1 Bridge Summary 11.7.2 Bridge Add/Edit Page Page Page Page 11.7.3 Virtual Interfaces Add/Edit Page 11.8 Interface Technical Reference Page Page Page Page Trunks 12.1 Overview 12.1.1What You Can Do in this Chapter 12.1.2What You Need to Know Page Page Page 12.2 The Trunk Summary Screen 12.3 Configuring a Trunk Page 12.4 Trunk Technical Reference Page Policy and Static Routes 13.1 Policy and Static Routes Overview 13.1.1What You Can Do in this Chapter 13.1.2What You Need to Know Page 13.2Policy Route Screen Page Page 13.2.1 Policy Route Edit Screen Page Page Page 13.3 IP Static Route Screen 13.3.1 Static Route Add/Edit Screen 13.4 Policy Routing Technical Reference NAT and SNAT Assured Forwarding (AF) PHB for DiffServ Port Triggering Maximize Bandwidth Usage Page Routing Protocols 14.1 Routing Protocols Overview 14.1.1What You Can Do in this Chapter 14.1.2What You Need to Know 14.2 The RIP Screen 14.3 The OSPF Screen Page Page Page 14.3.1 Configuring the OSPF Screen Page Page 14.3.2 OSPF Area Add/Edit Screen 14.3.3 Virtual Link Add/Edit Screen 14.4 Routing Protocol Technical Reference Page Page Zones 15.1 Zones Overview 15.1.1 What You Can Do in this Chapter 15.1.2 What You Need to Know 15.2 The Zone Screen 15.3 Zone Edit DDNS 16.1 DDNS Overview 16.1.1What You Can Do in this Chapter 16.1.2What You Need to Know 16.2 The DDNS Screen Page 16.2.1 The Dynamic DNS Add/Edit Screen Page Page NAT 17.1 NAT Overview 17.1.1 What You Can Do in this Chapter 17.1.2 What You Need to Know 17.2The NAT Screen Page 17.2.1 The NAT Add/Edit Screen Page Page 17.3 NAT Technical Reference NAT Loopback Page Page Page HTTP Redirect 18.1 Overview LAN1 18.1.1 What You Can Do in this Chapter 18.1.2 What You Need to Know 18.2 The HTTP Redirect Screen 18.2.1 The HTTP Redirect Edit Screen ALG 19.1 ALG Overview 19.1.1 What You Can Do in this Chapter 19.1.2 What You Need to Know Page Page 19.1.3Before You Begin 19.2 The ALG Screen Page 19.3 ALG Technical Reference Page IP/MAC Binding 20.1 IP/MAC Binding Overview 20.1.1What You Can Do in this Chapter 20.1.2 What You Need to Know 20.2 IP/MAC Binding Summary 20.2.1 IP/MAC Binding Edit 20.2.2 Static DHCP Edit 20.3 IP/MAC Binding Exempt List Page Authentication Policy 21.1 Overview 21.1.1 What You Can Do in this Chapter 21.1.2 What You Need to Know 21.2 Authentication Policy Screen Page Page 21.2.1 Creating/Editing an Authentication Policy Page Page Page Firewall 22.1 Overview 22.1.1What You Can Do in this Chapter 22.1.2 What You Need to Know Page 22.1.3Firewall Rule Example Applications Page Page 22.1.4 Firewall Rule Configuration Example Page 22.2 The Firewall Screen 22.2.1 Configuring the Firewall Screen Page Page 22.2.2 The Firewall Add/Edit Screen 22.3 The Session Limit Screen Page 22.3.1 The Session Limit Add/Edit Screen Page Page IPSec VPN 23.1 IPSec VPN Overview 23.1.1What You Can Do in this Chapter 23.1.2What You Need to Know Page 23.1.3Before You Begin 23.2The VPN Connection Screen Page 23.2.1 The VPN Connection Add/Edit (IKE) Screen Page Page Page Page Page Page 23.2.2 The VPN Connection Add/Edit Manual Key Screen Page Page 23.3 The VPN Gateway Screen 23.3.1 The VPN Gateway Add/Edit Screen Page Page Page Page Page Page Page 23.4 IPSec VPN Background Information IKE SA Overview Page Page Page Page Page IPSec SA Overview Page Page Page Page Page SSL VPN 24.1 Overview 24.1.1What You Can Do in this Chapter 24.1.2What You Need to Know Page 24.2 The SSL Access Privilege Screen 24.2.1 The SSL Access Policy Add/Edit Screen Page 24.3 The SSL Global Setting Screen Page 24.3.1 How to Upload a Custom Logo 24.4 Establishing an SSL VPN Connection Page SSL User Screens 25.1 Overview 25.1.1 What You Need to Know 25.2 Remote User Login Page Page Page Page 25.3 The SSL VPN User Screens 25.4 Bookmarking the ZyWALL 25.5Logging Out of the SSL VPN User Screens Page Page SSL User Application Screens 26.1 SSL User Application Screens Overview 26.2 The Application Screen Page ZyWALL SecuExtender 27.1 The ZyWALL SecuExtender Icon 27.2 Statistics 27.3 View Log 27.4 Suspend and Resume the Connection 27.5 Stop the Connection 27.6 Uninstalling the ZyWALL SecuExtender Application Patrol 28.1 Overview 28.1.1What You Can Do in this Chapter 28.1.2 What You Need to Know Page Page Page Page 28.1.3Application Patrol Bandwidth Management Examples 28.1.3.1 Setting the Interface’s Bandwidth 28.1.3.2SIP Any to WAN Bandwidth Management Example 28.1.3.3 SIP WAN to Any Bandwidth Management Example 28.1.3.4HTTP Any to WAN Bandwidth Management Example 28.1.3.5FTP WAN to DMZ Bandwidth Management Example 28.1.3.6FTP LAN to DMZ Bandwidth Management Example 28.2 Application Patrol General Screen 28.3 Application Patrol Applications 28.3.1 The Application Patrol Edit Screen Page Page Page 28.3.2 The Application Patrol Policy Edit Screen Page Page 28.4 The Other Applications Screen Page Page 28.4.1 The Other Applications Add/Edit Screen Page Page Page Anti-Virus 29.1 Overview 29.1.1What You Can Do in this Chapter 29.1.2 What You Need to Know 29.1.3Before You Begin 29.2 Anti-VirusSummary Screen Page Page 29.2.1 Anti-VirusPolicy Add or Edit Screen Page 29.3 Anti-VirusBlack List 29.4 Anti-VirusBlack List or White List Add/Edit 29.5 Anti-VirusWhite List 29.6 Signature Searching Page Page 29.7 Anti-VirusTechnical Reference Page IDP 30.1 Overview 30.1.1What You Can Do in this Chapter 30.1.2What You Need To Know 30.1.3Before You Begin 30.2 The IDP General Screen Page 30.3 Introducing IDP Profiles 30.3.1 Base Profiles 30.4 The Profile Summary Screen 30.5 Creating New Profiles 30.5.1 Procedure To Create a New Profile 30.6 Profiles: Packet Inspection 30.6.1 Profile > Group View Screen Page Page 30.6.2 Policy Types 30.6.3 IDP Service Groups Page 30.6.4 Profile > Query View Screen Page 30.6.5 Query Example Page 30.7 Introducing IDP Custom Signatures 30.7.1 IP Packet Header 30.8 Configuring Custom Signatures Page 30.8.1 Creating or Editing a Custom Signature Page Page Page Page Page 30.8.2 Custom Signature Example 30.8.2.2 Analyze Packets 30.8.3 Applying Custom Signatures 30.8.4 Verifying Custom Signatures 30.9 IDP Technical Reference Page Page ADP 31.1 Overview 31.1.1 ADP and IDP Comparison 31.1.2What You Can Do in this Chapter 31.1.3What You Need To Know 31.1.4Before You Begin 31.2 The ADP General Screen 31.3 The Profile Summary Screen 31.3.1 Base Profiles 31.3.2 Configuring The ADP Profile Summary Screen 31.3.3 Creating New ADP Profiles 31.3.4 Traffic Anomaly Profiles Page Page 31.3.5 Protocol Anomaly Profiles 31.3.6 Protocol Anomaly Configuration Page Page Page 31.4 ADP Technical Reference Traffic Anomaly Background Information Page Page Page Protocol Anomaly Background Information Page Page Page Content Filtering 32.1 Overview 32.1.1What You Can Do in this Chapter 32.1.2What You Need to Know Page 32.1.3Before You Begin 32.2 Content Filter General Screen Page Page 32.3 Content Filter Policy Add or Edit Screen Page 32.4 Content Filter Profile Screen 32.5 Content Filter Categories Screen Page Page Page Page Page Page Page Page Page Page Page 32.5.1 Content Filter Blocked and Warning Messages 32.6 Content Filter Customization Screen Page 32.7 Content Filter Technical Reference External Content Filter Server Lookup Procedure Content Filter Reports 33.1 Overview 33.2 Viewing Content Filter Reports Page Page Page Page Page Page Page Anti-Spam 34.1 Overview 34.1.1What You Can Do in this Chapter 34.1.2What You Need to Know Page 34.2 Before You Begin 34.3 The Anti-SpamGeneral Screen Page 34.3.1 The Anti-SpamPolicy Add or Edit Screen Page 34.4 The Anti-SpamBlack List Screen Page 34.4.1 The Anti-SpamBlack or White List Add/Edit Screen 34.4.2 Regular Expressions in Black or White List Entries 34.5 The Anti-SpamWhite List Screen 34.6 The DNSBL Screen Page 34.7 Anti-SpamTechnical Reference Page Page Page Page User/Group 35.1 Overview 35.1.1What You Can Do in this Chapter 35.1.2What You Need To Know Page Page 35.2 User Summary Screen 35.2.1 User Add/Edit Screen Page Page 35.3 User Group Summary Screen 35.3.1 Group Add/Edit Screen 35.4 Setting Screen Page Page 35.4.1Default User Authentication Timeout Settings Edit Screens Page 35.4.2 User Aware Login Example 35.5 User /Group Technical Reference Page Addresses 36.1 Overview 36.1.1What You Can Do in this Chapter 36.1.2What You Need To Know 36.2Address Summary Screen Page 36.2.1 Address Add/Edit Screen 36.3 Address Group Summary Screen 36.3.1 Address Group Add/Edit Screen Page Services 37.1 Overview 37.1.1What You Can Do in this Chapter 37.1.2What You Need to Know 37.2The Service Summary Screen Page 37.2.1 The Service Add/Edit Screen 37.3 The Service Group Summary Screen Page 37.3.1 The Service Group Add/Edit Screen Schedules 38.1 Overview 38.1.1What You Can Do in this Chapter 38.1.2What You Need to Know 38.2The Schedule Summary Screen 38.2.1 The One-TimeSchedule Add/Edit Screen 38.2.2 The Recurring Schedule Add/Edit Screen Page Page AAA Server 39.1 Overview 39.1.1 Directory Service (AD/LDAP) 39.1.2 RADIUS Server 39.1.3 ASAS 39.1.4What You Can Do in this Chapter 39.1.5What You Need To Know Page 39.2Active Directory or LDAP Server Summary 39.2.1 Adding an Active Directory or LDAP Server Page 39.3 RADIUS Server Summary Page 39.3.1 Adding a RADIUS Server Page Authentication Method 40.1 Overview 40.1.1What You Can Do in this Chapter 40.1.2 Before You Begin 40.1.3 Example: Selecting a VPN Authentication Method 40.2Authentication Method Objects 40.2.1 Creating an Authentication Method Object Page Page Page Certificates 41.1 Overview 41.1.1What You Can Do in this Chapter 41.1.2What You Need to Know Page 41.1.3Verifying a Certificate Page 41.2 The My Certificates Screen 41.2.1 The My Certificates Add Screen Page Page Page Page 41.2.2 The My Certificates Edit Screen Page Page 41.2.3 The My Certificates Import Screen 41.3 The Trusted Certificates Screen 41.3.1 The Trusted Certificates Edit Screen Page Page Page 41.3.2 The Trusted Certificates Import Screen 41.4 Certificates Technical Reference OCSP Page ISP Accounts 42.1 Overview 42.1.1What You Can Do in this Chapter 42.2 ISP Account Summary 42.2.1 ISP Account Edit Page Page SSL Application 43.1 Overview 43.1.1What You Can Do in this Chapter 43.1.2What You Need to Know 43.1.3 Example: Specifying a Web Site for Access 43.2 The SSL Application Screen 43.2.1 Creating/Editing a Web-basedSSL Application Object Page Page Endpoint Security 44.1 Overview 44.1.1 What You Can Do in this Chapter 44.1.2 What You Need to Know 44.2 Endpoint Security Screen Page 44.3 Endpoint Security Add/Edit Page Page Page Page Page System 45.1 Overview 45.1.1What You Can Do in this Chapter 45.2 Host Name 45.3 Date and Time Page Page 45.3.1 Pre-definedNTP Time Servers List 45.3.2 Time Server Synchronization 45.4Console Port Speed 45.5 DNS Overview 45.5.1 DNS Server Address Assignment 45.5.2Configuring the DNS Screen Page Page 45.5.3 Address Record 45.5.4 PTR Record 45.5.5 Adding an Address/PTR Record 45.5.6 Domain Zone Forwarder 45.5.7 Adding a Domain Zone Forwarder 45.5.8 MX Record 45.5.9 Adding a MX Record 45.5.10 Adding a DNS Service Control Rule 45.6 WWW Overview 45.6.1 Service Access Limitations 45.6.2 System Timeout 45.6.3 HTTPS 45.6.4 Configuring WWW Service Control Page Page Page 45.6.5 Service Control Rules 45.6.6 Customizing the WWW Login Page Page Page Page 45.6.7 HTTPS Example 45.6.7.2 Netscape Navigator Warning Messages 45.6.7.3 Avoiding Browser Warning Messages 45.6.7.4Login Screen 45.6.7.5 Enrolling and Importing SSL Client Certificates Page Page Page 45.6.7.6 Using a Certificate When Accessing the ZyWALL Example 45.7 SSH 45.7.1 How SSH Works 45.7.2 SSH Implementation on the ZyWALL 45.7.3 Requirements for Using SSH 45.7.4 Configuring SSH Page 45.7.5 Secure Telnet Using SSH Examples 45.8Telnet 45.8.1 Configuring Telnet 45.9 FTP 45.9.1 Configuring FTP Page 45.10 SNMP Page 45.10.1Supported MIBs 45.10.2 SNMP Traps 45.10.3 Configuring SNMP Page 45.11 Vantage CNM 45.11.1 Configuring Vantage CNM Page 45.12 Language Screen Log and Report 46.1 Overview 46.1.1What You Can Do In this Chapter 46.2 Email Daily Report Page 46.3 Log Setting Screens 46.3.1 Log Setting Summary 46.3.2 Edit System Log Settings Page Page Page Page 46.3.3 Edit Remote Server Log Settings Page 46.3.4 Active Log Summary Screen Page Page File Manager 47.1 Overview 47.1.1What You Can Do in this Chapter 47.1.2What you Need to Know Page Page 47.2 The Configuration File Screen Page Page Page 47.3 The Firmware Package Screen Page 47.4 The Shell Script Screen Page Page Diagnostics 48.1 Overview 48.1.1What You Can Do in this Chapter 48.2 The Diagnostic Screen 48.3 The Packet Capture Screen Page 48.3.1 The Packet Capture Files Screen 48.3.2 Example of Viewing a Packet Capture File Page Reboot 49.1 Overview 49.1.1 What You Need To Know 49.2 The Reboot Screen Page Shutdown 50.1 Overview 50.1.1 What You Need To Know 50.2 The Shutdown Screen Page Troubleshooting Page Page Page Page Page Page Page Page Page Page Page Page Page 51.1 Resetting the ZyWALL 51.2Getting More Troubleshooting Help Product Specifications Page Page Page Page 52.1 Power Adaptor Specifications Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Internet Explorer Page Page Page Page Page Page Page Page Firefox Page Page Page Page Opera Page Page Page Page Page Page Konqueror Page Page Page Page End-UserLicense Agreement for “ZyWALL USG 50” Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Copyright Certifications (Class B) Page ZyXEL Limited Warranty Page Index

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