ZyXEL Communications ZYWALL USG 20 User manual

www.zyxel.com
www.zyxel.com
ZyWALL USG 20/20W
Unified Security Gateway
Copyright © 2011
ZyXEL Communications Corporation
Version 2.21
Edition 4, 4/2011
Default Login Details
LAN Port P2, P3
IP Address https://192.168.1.1
User Name admin
Password 1234

About This User's Guide
ZyWALL USG 20/20W User’s Guide 3
About This User's Guide
Intended Audience
This manual is intended for people who want to want to configure the ZyWALL
using the Web Configurator.
How To Use This Guide
•Read Chapter 1 on page 29 chapter for an overview of features available on the
ZyWALL.
•Read Chapter 3 on page 43 for web browser requirements and an introduction
to the main components, icons and menus in the ZyWALL Web Configurator.
•Read Chapter 4 on page 59 if you’re using the installation wizard for first time
setup and you want more detailed information than what the real time online
help provides.
•Read Chapter 5 on page 69 if you’re using the quick setup wizards and you want
more detailed information than what the real time online help provides.
• It is highly recommended you read Chapter 6 on page 87 for detailed
information on essential terms used in the ZyWALL, what prerequisites are
needed to configure a feature and how to use that feature.
• It is highly recommended you read Chapter 7 on page 107 for ZyWALL
application examples.
• Subsequent chapters are arranged by menu item as defined in the Web
Configurator. Read each chapter carefully for detailed information on that menu
item.
• To find specific information in this guide, use the Contents Overview, the
Table of Contents, the Index, or search the PDF file. E-mail
[e-mail] if you cannot find the information you require.
Related Documentation
•Quick Start Guide
The Quick Start Guide is designed to show you how to make the ZyWALL
hardware connections and access the Web Configurator wizards. (See the
wizard real time help for information on configuring each screen.) It also
contains a connection diagram and package contents list.
•CLI Reference Guide
The CLI Reference Guide explains how to use the Command-Line Interface (CLI)
to configure the ZyWALL.
Note: It is recommended you use the Web Configurator to configure the ZyWALL.

About This User's Guide
ZyWALL USG 20/20W User’s Guide
4
• Web Configurator Online Help
Click the help icon in any screen for help in configuring that screen and
supplementary information.
• ZyXEL Web Site
Please refer to www.zyxel.com for additional support documentation and
product certifications.
User Guide Feedback
Help us help you. Send all User Guide-related comments, questions or suggestions
for improvement to the following address, or use e-mail instead. Thank you!
The Technical Writing Team,
ZyXEL Communications Corp.,
6 Innovation Road II,
Science-Based Industrial Park,
Hsinchu, 300, Taiwan.
E-mail: [email protected]om.tw
Need More Help?
More help is available at www.zyxel.com.
• Download Library
Search for the latest product updates and documentation from this link. Read
the Tech Doc Overview to find out how to efficiently use the User Guide, Quick
Start Guide and Command Line Interface Reference Guide in order to better
understand how to use your product.
• Knowledge Base
If you have a specific question about your product, the answer may be here.
This is a collection of answers to previously asked questions about ZyXEL
products.

About This User's Guide
ZyWALL USG 20/20W User’s Guide 5
•Forum
This contains discussions on ZyXEL products. Learn from others who use ZyXEL
products and share your experiences as well.
Customer Support
Should problems arise that cannot be solved by the methods listed above, you
should contact your vendor. If you cannot contact your vendor, then contact a
ZyXEL office for the region in which you bought the device.
See http://www.zyxel.com/web/contact_us.php for contact information. Please
have the following information ready when you contact an office.
• Product model and serial number.
•Warranty Information.
• Date that you received your device.
• Brief description of the problem and the steps you took to solve it.
Disclaimer
Graphics in this book may differ slightly from the product due to differences in
operating systems, operating system versions, or if you installed updated
firmware/software for your device. Every effort has been made to ensure that the
information in this manual is accurate.

Document Conventions
ZyWALL USG 20/20W User’s Guide
6
Document Conventions
Warnings and Notes
These are how warnings and notes are shown in this User’s Guide.
Warnings tell you about things that could harm you or your device.
Note: Notes tell you other important information (for example, other things you may
need to configure or helpful tips) or recommendations.
Syntax Conventions
• The ZyWALL may be referred to as the “ZyWALL”, the “device”, the “system” or
the “product” in this User’s Guide.
• Product labels, screen names, field labels and field choices are all in bold font.
• A key stroke is denoted by square brackets and uppercase text, for example,
[ENTER] means the “enter” or “return” key on your keyboard.
• “Enter” means for you to type one or more characters and then press the
[ENTER] key. “Select” or “choose” means for you to use one of the predefined
choices.
• A right angle bracket ( > ) within a screen name denotes a mouse click. For
example, Maintenance > Log > Log Setting means you first click
Maintenance in the navigation panel, then the Log sub menu and finally the
Log Setting tab to get to that screen.
• Units of measurement may denote the “metric” value or the “scientific” value.
For example, “k” for kilo may denote “1000” or “1024”, “M” for mega may
denote “1000000” or “1048576” and so on.
• “e.g.,” is a shorthand for “for instance”, and “i.e.,” means “that is” or “in other
words”.

Document Conventions
ZyWALL USG 20/20W User’s Guide 7
Icons Used in Figures
Figures in this User’s Guide may use the following generic icons. The ZyWALL icon
is not an exact representation of your device.
ZyWALL Computer Notebook computer
Server Firewall Tel epho ne
Switch Router

Safety Warnings
ZyWALL USG 20/20W User’s Guide
8
Safety Warnings
• Do NOT use this product near water, for example, in a wet basement or near a swimming
pool.
• Do NOT expose your device to dampness, dust or corrosive liquids.
• Do NOT store things on the device.
• Do NOT install, use, or service this device during a thunderstorm. There is a remote risk
of electric shock from lightning.
• Connect ONLY suitable accessories to the device.
• Do NOT open the device or unit. Opening or removing covers can expose you to
dangerous high voltage points or other risks. ONLY qualified service personnel should
service or disassemble this device. Please contact your vendor for further information.
• Make sure to connect the cables to the correct ports.
• Place connecting cables carefully so that no one will step on them or stumble over them.
• Always disconnect all cables from this device before servicing or disassembling.
• Use ONLY an appropriate power adaptor or cord for your device. Connect it to the right
supply voltage (for example, 110V AC in North America or 230V AC in Europe).
• Do NOT remove the plug and connect it to a power outlet by itself; always attach the plug
to the power adaptor first before connecting it to a power outlet.
• Do NOT allow anything to rest on the power adaptor or cord and do NOT place the
product where anyone can walk on the power adaptor or cord.
• Do NOT use the device if the power adaptor or cord is damaged as it might cause
electrocution.
• If the power adaptor or cord is damaged, remove it from the device and the power
source.
• Do NOT attempt to repair the power adaptor or cord. Contact your local vendor to order a
new one.
• Do not use the device outside, and make sure all the connections are indoors. There is a
remote risk of electric shock from lightning.
• CAUTION: RISK OF EXPLOSION IF BATTERY (on the motherboard) IS REPLACED BY AN
INCORRECT TYPE. DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.
Dispose them at the applicable collection point for the recycling of electrical and
electronic equipment. For detailed information about recycling of this product, please
contact your local city office, your household waste disposal service or the store where
you purchased the product.
• Do NOT obstruct the device ventilation slots, as insufficient airflow may harm your
device.
• Antenna Warning! This device meets ETSI and FCC certification requirements when using
the included antenna(s). Only use the included antenna(s).
• If you wall mount your device, make sure that no electrical lines, gas or water pipes will
be damaged.
Your product is marked with this symbol, which is known as the WEEE mark. WEEE
stands for Waste Electronics and Electrical Equipment. It means that used electrical
and electronic products should not be mixed with general waste. Used electrical and
electronic equipment should be treated separately.

Contents Overview
ZyWALL USG 20/20W User’s Guide 9
Contents Overview
User’s Guide ...........................................................................................................................27
Introducing the ZyWALL ............................................................................................................ 29
Features and Applications ......................................................................................................... 37
Web Configurator ....................................................................................................................... 43
Installation Setup Wizard ........................................................................................................... 59
Quick Setup ............................................................................................................................... 69
Configuration Basics .................................................................................................................. 87
Tutorials ................................................................................................................................... 107
Technical Reference ............................................................................................................163
Dashboard ...............................................................................................................................165
Monitor ..................................................................................................................................... 177
Registration ..............................................................................................................................211
Interfaces ................................................................................................................................. 217
Trunks ...................................................................................................................................... 289
Policy and Static Routes .......................................................................................................... 297
Routing Protocols ....................................................................................................................313
Zones ....................................................................................................................................... 327
DDNS ...................................................................................................................................... 331
NAT .......................................................................................................................................... 337
HTTP Redirect ......................................................................................................................... 347
ALG ......................................................................................................................................... 351
IP/MAC Binding ....................................................................................................................... 359
Authentication Policy ...............................................................................................................365
Firewall .................................................................................................................................... 373
IPSec VPN ...............................................................................................................................391
SSL VPN ................................................................................................................................. 427
SSL User Screens .................................................................................................................. 437
SSL User Application Screens ................................................................................................ 447
ZyWALL SecuExtender ...........................................................................................................449
Bandwidth Management ........................................................................................................453
ADP ......................................................................................................................................... 467
Content Filtering ...................................................................................................................... 487
Content Filter Reports .............................................................................................................513
Anti-Spam ................................................................................................................................ 521
User/Group .............................................................................................................................. 539
Addresses ................................................................................................................................ 555
Services ................................................................................................................................... 561

Contents Overview
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Schedules ................................................................................................................................ 567
AAA Server .............................................................................................................................. 573
Authentication Method .............................................................................................................583
Certificates ............................................................................................................................... 589
ISP Accounts ............................................................................................................................611
SSL Application ....................................................................................................................... 615
Endpoint Security ....................................................................................................................621
System ..................................................................................................................................... 629
Log and Report ........................................................................................................................ 679
File Manager ............................................................................................................................ 693
Diagnostics ............................................................................................................................ 705
Packet Flow Explore ................................................................................................................ 715
Reboot ..................................................................................................................................... 723
Shutdown .................................................................................................................................725
Troubleshooting .......................................................................................................................727
Product Specifications ............................................................................................................. 741