ZyXEL Communications ZYWALL2 ET 2WE Bedienungsanleitung

ZyWALL 2 Series

Internet Security Gateway

User’s Guide

Version 3.62

February 2004

ZyWALL 2 Series User’s Guide

ii Copyright

The contents of this publication may not be reproduced in any part or as a whole, transcribed, stored in a

retrieval system, translated into any language, or transmitted in any form or by any means, electronic,

mechanical, magnetic, optical, chemical, photocopying, manual, or otherwise, without the prior written

permission of ZyXEL Communications Corporation.

Disclaimer

ZyXEL does not assume any liability arising out of the application or use of any products, or software

described herein. Neither does it convey any license under its patent rights nor the patent rights of others.

ZyXEL further reserves the right to make changes in any products described herein without notice.

This publication is subject to change without notice.

Trademarks

Trademarks mentioned in this publication are used for identification purposes only and may be properties of

their respective owners.

ZyWALL 2 Series User’s Guide

FCC iii

Federal Communications Commission (FCC)

Interference Statement

This device complies with Part 15 of FCC rules. Operation is subject to the following two conditions:

This device may not cause harmful interference.

This device must accept any interference received, including interference that may cause undesired

operations.

This equipment has been tested and found to comply with the limits for a CLASS B digital device pursuant to

Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful

interference in a commercial environment. This equipment generates, uses, and can radiate radio frequency

energy, and if not installed and used in accordance with the instructions, may cause harmful interference to

radio communications.

If this equipment does cause harmful interference to radio/television reception, which can be determined by

turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of

the following measures:

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and the receiver.

Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

Consult the dealer or an experienced radio/TV technician for help.

Notice 1

Changes or modifications not expressly approved by the party responsible for compliance could void the

user's authority to operate the equipment.

Certifications

1. Go to www.zyxel.com

2. Select your product from the drop-down list box on the ZyXEL home page to go to that product's page.

3. Select the certification you wish to view from this page

ZyWALL 2 Series User’s Guide

iv Information for Canadian Users

Information for Canadian Users

The Industry Canada label identifies certified equipment. This certification means that the equipment meets

certain telecommunications network protective, operation, and safety requirements. The Industry Canada

does not guarantee that the equipment will operate to a user's satisfaction.

Before installing this equipment, users should ensure that it is permissible to be connected to the facilities of

the local telecommunications company. The equipment must also be installed using an acceptable method of

connection. In some cases, the company's inside wiring associated with a single line individual service may

be extended by means of a certified connector assembly. The customer should be aware that the compliance

with the above conditions may not prevent degradation of service in some situations.

Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by

the supplier. Any repairs or alterations made by the user to this equipment, or equipment malfunctions, may

give the telecommunications company cause to request the user to disconnect the equipment.

For their own protection, users should ensure that the electrical ground connections of the power utility,

telephone lines, and internal metallic water pipe system, if present, are connected together. This precaution

may be particularly important in rural areas.

Caution

Users should not attempt to make such connections themselves, but should contact the appropriate electrical

inspection authority, or electrician, as appropriate.

Note

This digital apparatus does not exceed the class A limits for radio noise emissions from digital apparatus set

out in the radio interference regulations of Industry Canada.

ZyWALL 2 Series User’s Guide

Warranty v

ZyXEL Limited Warranty

ZyXEL warrants to the original end user (purchaser) that this product is free from any defects in materials or

workmanship for a period of up to two years from the date of purchase. During the warranty period, and upon

proof of purchase, should the product have indications of failure due to faulty workmanship and/or materials,

ZyXEL will, at its discretion, repair or replace the defective products or components without charge for

either parts or labor, and to whatever extent it shall deem necessary to restore the product or components to

proper operating condition. Any replacement will consist of a new or re-manufactured functionally

equivalent product of equal value, and will be solely at the discretion of ZyXEL. This warranty shall not

apply if the product is modified, misused, tampered with, damaged by an act of God, or subjected to

abnormal working conditions.

NOTE

Repair or replacement, as provided under this warranty, is the exclusive remedy of the purchaser. This

warranty is in lieu of all other warranties, express or implied, including any implied warranty of

merchantability or fitness for a particular use or purpose. ZyXEL shall in no event be held liable for indirect

or consequential damages of any kind of character to the purchaser.

To obtain the services of this warranty, contact ZyXEL's Service Center for your Return Material

Authorization number (RMA). Products must be returned Postage Prepaid. It is recommended that the unit be

insured when shipped. Any returned products without proof of purchase or those with an out-dated warranty

will be repaired or replaced (at the discretion of ZyXEL) and the customer will be billed for parts and labor.

All repaired or replaced products will be shipped by ZyXEL to the corresponding return address, Postage

Paid. This warranty gives you specific legal rights, and you may also have other rights that vary from country

to country.

Online Registration

ZyWALL 2 Series User’s Guide

vi Customer Support

Customer Support

When you contact your customer support representative please have the following information ready:

Please have the following information ready when you contact customer support.

• 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.

SUPPORT E-MAIL TELEPHONE1WEB SITEMETHOD

LOCATION SALES E-MAIL FAX1FTP SITE

REGULAR MAIL

support@zyxel.com.tw

+886-3-578-3942 www.zyxel.com

www.europe.zyxel.com

WORLDWIDE

[email protected] +886-3-578-2439 ftp.zyxel.com

ftp.europe.zyxel.com

ZyXEL Communications Corp.

6 Innovation Road II

Science Park

Hsinchu 300

Taiwan

support@zyxel.com +1-800-255-4101

+1-714-632-0882

www.us.zyxel.comNORTH AMERICA

[email protected] +1-714-632-0858 ftp.us.zyxel.com

ZyXEL Communications Inc.

1130 N. Miller St.

Anaheim

CA 92806-2001

U.S.A.

support@zyxel.de +49-2405-6909-0 www.zyxel.deGERMANY

[email protected] +49-2405-6909-99

ZyXEL Deutschland GmbH.

Adenauerstr. 20/A2 D-52146

Wuerselen

Germany

+33 (0)4 72 52 97 97FRANCE [email protected]

+33 (0)4 72 52 19 20

www.zyxel.fr ZyXEL France

1 rue des Vergers

Bat. 1 / C

69760 Limonest

France

support@zyxel.es +34 902 195 420SPAIN

[email protected] +34 913 005 345

www.zyxel.es ZyXEL Communications

Alejandro Villegas 33

1º, 28043 Madrid

Spain

support@zyxel.dk +45 39 55 07 00 www.zyxel.dkDENMARK

[email protected] +45 39 55 07 07

ZyXEL Communications A/S

Columbusvej 5

2860 Soeborg

Denmark

support@zyxel.no +47 22 80 61 80 www.zyxel.noNORWAY

[email protected] +47 22 80 61 81

ZyXEL Communications A/S

Nils Hansens vei 13

0667 Oslo

Norway

support@zyxel.se +46 31 744 7700 www.zyxel.seSWEDEN

[email protected] +46 31 744 7701

ZyXEL Communications A/S

Sjöporten 4, 41764 Göteborg Sweden

support@zyxel.fi +358-9-4780-8411 www.zyxel.fiFINLAND

[email protected] +358-9-4780 8448

ZyXEL Communications Oy

Malminkaari 10

00700 Helsinki

Finland

1“+” is the (prefix) number you enter to make an international telephone call.

ZyWALL 2 Series User’s Guide

Table of Contents vii

Table of Contents

Copyright......................................................................................................................................................ii

Federal Communications Commission (FCC) Interference Statement................................................. iii

Information for Canadian Users ...............................................................................................................iv

ZyXEL Limited Warranty ..........................................................................................................................v

Customer Support ......................................................................................................................................vi

List of Figures ............................................................................................................................................xv

List of Tables ............................................................................................................................................xxii

Preface .....................................................................................................................................................xxvi

Getting Started ................................................................................................................................................. I

Chapter 1 Getting to Know Your ZyWALL .......................................................................................... 1-1

1.1 Introducing the ZyWALL ..........................................................................................................1-1

1.2 Features ...................................................................................................................................... 1-1

1.3 Applications for the ZyWALL................................................................................................... 1-6

Chapter 2 Introducing the Web Configurator ......................................................................................2-1

2.1 Web Configurator Overview...................................................................................................... 2-1

2.2 Accessing the ZyWALL Web Configurator............................................................................... 2-1

2.3 Resetting the ZyWALL.............................................................................................................. 2-2

2.4 Navigating the ZyWALL Web Configurator ............................................................................. 2-3

Chapter 3 Wizard Setup.......................................................................................................................... 3-1

3.1 Wizard Setup Overview ............................................................................................................. 3-1

3.2 General Setup and System Name ............................................................................................... 3-1

3.3 Internet Access........................................................................................................................... 3-2

3.4 WAN and DNS .......................................................................................................................... 3-8

3.5 Basic Setup Complete .............................................................................................................. 3-12

System and LAN .............................................................................................................................................II

Chapter 4 System Screens....................................................................................................................... 4-1

4.1 System Overview ....................................................................................................................... 4-1

4.2 Configuring General Setup......................................................................................................... 4-1

4.3 Dynamic DNS ............................................................................................................................ 4-3

4.4 Configuring Dynamic DNS........................................................................................................ 4-3

4.5 Configuring Password................................................................................................................ 4-5

4.6 Pre-defined NTP Time Servers List ........................................................................................... 4-6

4.7 Configuring Time Setting........................................................................................................... 4-7

Chapter 5 LAN Screens........................................................................................................................... 5-1

5.1 LAN Overview........................................................................................................................... 5-1

5.2 DHCP Setup............................................................................................................................... 5-1

5.3 IP Address and Subnet Mask ..................................................................................................... 5-1

5.4 DNS Server Address Assignment .............................................................................................. 5-2

5.5 LAN TCP/IP .............................................................................................................................. 5-2

ZyWALL 2 Series User’s Guide

viii Table of Contents

5.6 Configuring IP ............................................................................................................................5-3

5.7 Configuring Static DHCP ...........................................................................................................5-6

5.8 Configuring IP Alias...................................................................................................................5-7

WAN and Wireless LAN............................................................................................................................... III

Chapter 6 WAN Screens...........................................................................................................................6-1

6.1 WAN Overview ..........................................................................................................................6-1

6.2 TCP/IP Priority (Metric) .............................................................................................................6-1

6.3 WAN IP Address Assignment ....................................................................................................6-1

6.4 Configuring Route ......................................................................................................................6-2

6.5 Configuring WAN ISP................................................................................................................6-3

6.6 Configuring WAN IP..................................................................................................................6-9

6.7 Configuring WAN MAC ..........................................................................................................6-13

6.8 Traffic Redirect.........................................................................................................................6-14

6.9 Configuring Traffic Redirect ....................................................................................................6-15

6.10 Configuring Dial Backup......................................................................................................6-17

6.11 Advanced Modem Setup.......................................................................................................6-22

6.12 Configuring Advanced Modem Setup ..................................................................................6-23

Chapter 7 Wireless LAN Screens ............................................................................................................7-1

7.1 Wireless LAN Overview.............................................................................................................7-1

7.2 Wireless LAN Basics..................................................................................................................7-1

7.3 Wireless Security ........................................................................................................................7-3

7.4 Configuring Wireless LAN.........................................................................................................7-4

7.5 Configuring MAC Filter .............................................................................................................7-6

7.6 802.1x Overview.........................................................................................................................7-7

7.7 Local User Database ...................................................................................................................7-9

7.8 Configuring 802.1X ....................................................................................................................7-9

NAT and Static Route ....................................................................................................................................IV

Chapter 8 Network Address Translation (NAT) ....................................................................................8-1

8.1 NAT Overview ...........................................................................................................................8-1

8.2 Using NAT..................................................................................................................................8-4

8.3 SUA Server.................................................................................................................................8-5

8.4 Configuring SUA Server.............................................................................................................8-7

8.5 Configuring Address Mapping....................................................................................................8-8

8.6 Configuring Trigger Port ..........................................................................................................8-11

Chapter 9 Static Route Screens ...............................................................................................................9-1

9.1 Static Route Overview ................................................................................................................9-1

9.2 Configuring IP Static Route........................................................................................................9-1

Firewall and Content Filters .......................................................................................................................... V

Chapter 10 Firewalls ..............................................................................................................................10-1

10.1 Firewall Overview ................................................................................................................10-1

10.2 Types of Firewalls.................................................................................................................10-1

ZyWALL 2 Series User’s Guide

Table of Contents ix

10.3 Introduction to Nortel Networks Firewall ............................................................................ 10-2

10.4 Denial of Service.................................................................................................................. 10-3

10.5 Stateful Inspection................................................................................................................ 10-7

10.6 Guidelines For Enhancing Security With Your Firewall ................................................... 10-11

10.7 Packet Filtering Vs Firewall............................................................................................... 10-11

Chapter 11 Firewall Screens ..................................................................................................................11-1

11.1 Access Methods ................................................................................................................... 11-1

11.2 Firewall Policies Overview .................................................................................................. 11-1

11.3 Rule Logic Overview ........................................................................................................... 11-2

11.4 Connection Direction Examples........................................................................................... 11-3

11.5 Alerts.................................................................................................................................... 11-5

11.6 Configuring Firewall............................................................................................................11-5

11.7 Example Firewall Rule....................................................................................................... 11-13

11.8 Predefined Services............................................................................................................ 11-18

11.9 Configuring Attack Alert ................................................................................................... 11-20

Chapter 12 Content Filtering Screens.................................................................................................. 12-1

12.1 Introduction to Content Filtering.......................................................................................... 12-1

12.2 General Content Filter Configuration................................................................................... 12-1

12.3 Content Filtering with an External Server............................................................................ 12-4

12.4 Checking Content Filtering Activation ................................................................................ 12-5

12.5 Configuring Categories ........................................................................................................ 12-5

12.6 Configuring Customization ................................................................................................ 12-14

VPN/IPSec ..................................................................................................................................................... VI

Chapter 13 Introduction to IPSec......................................................................................................... 13-1

13.1 VPN Overview ..................................................................................................................... 13-1

13.2 IPSec Architecture ............................................................................................................... 13-3

13.3 Encapsulation ....................................................................................................................... 13-4

13.4 IPSec and NAT .................................................................................................................... 13-5

Chapter 14 VPN Screens ....................................................................................................................... 14-1

14.1 VPN/IPSec Overview........................................................................................................... 14-1

14.2 IPSec Algorithms ................................................................................................................. 14-1

14.3 My IP Address...................................................................................................................... 14-2

14.4 Secure Gateway Address...................................................................................................... 14-2

14.5 Summary Screen ..................................................................................................................14-3

14.6 Keep Alive ........................................................................................................................... 14-5

14.7 NAT Traversal ..................................................................................................................... 14-6

14.8 ID Type and Content ............................................................................................................ 14-8

14.9 Pre-Shared Key ..................................................................................................................14-10

14.10 VPN Implementation.......................................................................................................... 14-10

14.11 Configuring Basic IKE VPN Rule Setup ........................................................................... 14-11

14.12 IKE Phases ......................................................................................................................... 14-21

ZyWALL 2 Series User’s Guide

x Table of Contents

14.13 Configuring Advanced IKE Setup ......................................................................................14-24

14.14 Manual Key Setup...............................................................................................................14-28

14.15 Configuring Edit Manual Setup ..........................................................................................14-28

14.16 SA Monitor .........................................................................................................................14-33

14.17 Global Settings....................................................................................................................14-34

14.18 Telecommuter VPN/IPSec Examples .................................................................................14-35

14.19 VPN and Remote Management...........................................................................................14-38

Certificates ................................................................................................................................................... VII

Chapter 15 Certificates ..........................................................................................................................15-1

15.1 Certificates Overview ...........................................................................................................15-1

15.2 Self-signed Certificates .........................................................................................................15-2

15.3 Configuration Summary........................................................................................................15-2

15.4 My Certificates .....................................................................................................................15-3

15.5 Certificate File Formats ........................................................................................................15-5

15.6 Importing a Certificate..........................................................................................................15-6

15.7 Creating a Certificate ............................................................................................................15-7

15.8 My Certificate Details.........................................................................................................15-10

15.9 Trusted CAs ........................................................................................................................15-14

15.10 Importing a Trusted CA’s Certificate .................................................................................15-16

15.11 Trusted CA Certificate Details............................................................................................15-17

15.12 Trusted Remote Hosts.........................................................................................................15-21

15.13 Verifying a Trusted Remote Host’s Certificate...................................................................15-23

15.14 Importing a Trusted Remote Host’s Certificate ..................................................................15-24

15.15 Trusted Remote Host Certificate Details ............................................................................15-25

15.16 Directory Servers ................................................................................................................15-29

15.17 Add or Edit a Directory Server ...........................................................................................15-30

Authentication Server, Remote Management and UPnP ........................................................................VIII

Chapter 16 Authentication Server ........................................................................................................16-1

16.1 Authentication Server Overview...........................................................................................16-1

16.2 Local User Database .............................................................................................................16-1

16.3 Configuring Local User Database.........................................................................................16-1

16.4 Configuring RADIUS ...........................................................................................................16-3

Chapter 17 Remote Management Screens............................................................................................17-1

17.1 Remote Management Overview............................................................................................17-1

17.2 Introduction to HTTPS .........................................................................................................17-2

17.3 Configuring WWW...............................................................................................................17-4

17.4 HTTPS Example ...................................................................................................................17-6

17.5 SSH Overview ....................................................................................................................17-13

17.6 How SSH works..................................................................................................................17-14

17.7 SSH Implementation on the ZyWALL ...............................................................................17-15

17.8 Configuring SSH.................................................................................................................17-15

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