SonicWALL TELE3 SP Service manual

SONICWALL
The TELE3 SP Administrator's Guide
SonicWALL, Inc.
1160 Bordeaux Drive
Sunnyvale, CA 94089-1209
Tel: [phone]
Fax: [phone]
E-mail: [email protected]
Web: www.sonicwall.com
Part# 232-000091-01
Rev. B 10/00

Contents Page 1
Contents
Copyright Notice ................................................................................. 7
About this Guide ................................................................................. 8
SonicWALL Technical Support .............................................................. 9
1 Introduction ......................................................................................10
Your SonicWALL TELE3 SP (Smart Path) Internet Security Appliance .....10
SonicWALL TELE3 SP Internet Security Appliance Features ...................11
2 General and Network Settings ..........................................................14
Network ............................................................................................14
Network Settings ...............................................................................14
Standard Configuration ......................................................................17
NAT with DHCP Client Configuration ...................................................20
Setting the Time and Date .................................................................23
Setting the Administrator Password ....................................................24
3 Managing Your SonicWALL TELE3 SP ...............................................25
Status ...............................................................................................27
CLI Support and Remote Management ................................................28
4 Logging and Alerts ............................................................................30
SonicWALL Log Messages ..................................................................31
Log Settings ......................................................................................32
Log Categories ..................................................................................34
Alert Categories .................................................................................35
Reports ............................................................................................35
5 Content Filtering and Blocking .........................................................37
Configuring SonicWALL Content Filtering .............................................38
Restrict Web Features ........................................................................38
URL List ............................................................................................39
Customizing the Content Filtering List .................................................41
Consent ............................................................................................43
Configuring N2H2 Internet Filtering ....................................................45
Restrict Web Features ........................................................................46
Configuring Websense Enterprise Content Filter ...................................49
Restrict Web Features ........................................................................49
Configuring Websense Content Filter List ............................................51
Websense Server Status ....................................................................51
Settings ............................................................................................51
URL Cache ........................................................................................52

Page 2 SonicWALL TELE3 SP Administrator’s Guide
6 Web Management Tools ...................................................................53
Preferences .......................................................................................54
Exporting the Settings File .................................................................55
Importing the Settings File .................................................................56
Restoring Factory Default Settings ......................................................56
Updating Firmware Manually ..............................................................59
Upgrade Features ..............................................................................60
Diagnostic Tools ................................................................................61
DNS Name Lookup ............................................................................61
Ping .................................................................................................62
Packet Trace .....................................................................................63
Tech Support Report .........................................................................66
Trace Route ......................................................................................67
7 Network Access Rules .......................................................................69
Viewing Network Access Rules ............................................................70
Services ............................................................................................70
Windows Networking (NetBIOS) Broadcast Pass Through .....................71
Detection Prevention .........................................................................71
Network Connection Inactivity Timeout ...............................................71
Add Service .......................................................................................72
Rules ................................................................................................73
Understanding the Access Rule Hierarchy ............................................78
Examples ..........................................................................................79
HTTPS Management of the SonicWALL ...............................................80
Users ................................................................................................81
User Login Changes ...........................................................................84
RADIUS ............................................................................................85
SonicWALL Management ...................................................................86
SonicWALL Remote Management ........................................................87
8 Advanced Features ...........................................................................90
Proxy Relay .......................................................................................90
Intranet ............................................................................................92
Intranet Configuration .......................................................................92
Routes ..............................................................................................94
One-to-One NAT ...............................................................................95
The Ethernet Tab ..............................................................................97
Bandwidth Management ....................................................................98
Introduction to Bandwidth Management ..............................................98

Contents Page 3
9 DHCP Server ....................................................................................102
Setup .............................................................................................102
Enable DHCP Server ........................................................................103
Deleting Dynamic Ranges and Static Entries ......................................104
DHCP over VPN ...............................................................................105
DHCP Status ...................................................................................109
DHCP Status ...................................................................................109
10 SonicWALL VPN ............................................................................110
NAT Traversal Support .....................................................................111
The VPN Interface ...........................................................................112
SonicWALL VPN Client for Remote Access and Management ...............113
The Configure Tab ...........................................................................114
VPN Advanced Settings ....................................................................117
Advanced Settings for VPN Configurations .........................................121
Enabling Group VPN on the SonicWALL .............................................122
Group VPN Client Configuration ........................................................124
Manual Key Configuration for a SonicWALL and VPN Client .................127
Installing the VPN Client Software ....................................................128
VPN for Two SonicWALLs .................................................................135
Manual Key for Two SonicWALLs ......................................................135
Example of Manual Key Configuration for Two SonicWALLs ................138
IKE Configuration for Two SonicWALLs .............................................141
Example: Linking Two SonicWALLs using IKE ....................................144
VPN Third Party Digital Certificate Support ........................................147
Overview of Third Party Digital Certificate Support .............................148
Creating a Certificate Signing Request ...............................................150
Testing a VPN Tunnel Connection Using PING ...................................154
Configuring Windows Networking .....................................................155
Adding, Modifying and Deleting Destination Networks ........................157
SonicWALL Enhanced VPN Logging ...................................................158
Disabling Security Associations .........................................................159
Basic VPN Terms and Concepts ........................................................160
11 High Availability ............................................................................163
Getting Started with High Availability ................................................164
Before Configuring High Availability ..................................................164
Network Configuration for High Availability Pair .................................164
Configuring High Availability on the Primary SonicWALL .....................165
High Availability Status ....................................................................168

Page 4 SonicWALL TELE3 SP Administrator’s Guide
High Availability Status Window ........................................................168
E-mail Alerts Indicating Status Change ..............................................170
View Log ........................................................................................170
Configuration Notes .........................................................................171
12 SonicWALL Options and Upgrades ................................................172
SonicWALL VPN Client for Windows ..................................................172
SonicWALL Network Anti-Virus .........................................................172
Content Filter List Subscription .........................................................173
Vulnerability Scanning Service ..........................................................173
SonicWALL Authentication Service ....................................................173
SonicWALL ViewPoint Reporting .......................................................173
SonicWALL Global Management System ............................................174
13 Hardware Description ...................................................................175
SonicWALL TELE3 SP Front Panel .....................................................175
SonicWALL TELE3 SP Front Panel Description ....................................175
SonicWALL TELE3 SP Back Panel ......................................................176
The SonicWALL TELE3 SP Back Panel Description ..............................176
14 Troubleshooting Guide ..................................................................178
The Link LED is off. .........................................................................178
A computer on the LAN cannot access the Internet. ...........................178
The SonicWALL does not establish authenticated sessions. .................178
The SonicWALL does not save changes that you have made. ..............179
Duplicate IP address errors ..............................................................179
Machines on the WAN are not reachable. ..........................................179
15 Appendices ....................................................................................180
Appendix A - Technical Specifications ................................................180
Appendix B - SonicWALL Support Solutions .......................................182
Appendix C - Introduction to Networking ...........................................189
Appendix D - IP Port Numbers ..........................................................194
Appendix E - Configuring TCP/IP Settings ..........................................195
Appendix F - Erasing the Firmware ...................................................197
Appendix G - Configuring RADIUS and ACE Servers ...........................198
Appendix H - Regulatory Compliance ................................................203
Notes .............................................................................................205

Page 5
Copyright Notice
©2002 SonicWALL, Inc. All rights reserved.
Under the copyright laws, this manual or the software described within, can not be copied, in
whole or part, without the written consent of the manufacturer, except in the normal use of the
software to make a backup copy. The same proprietary and copyright notices must be affixed
to any permitted copies as were affixed to the original. This exception does not allow copies to
be made for others, whether or not sold, but all of the material purchased (with all backup
copies) can be sold, given, or loaned to another person. Under the law, copying includes
translating into another language or format.
SonicWALL is a registered trademark of SonicWALL, Inc.
Other product and company names mentioned herein can be trademarks and/or registered
trademarks of their respective companies.
Specifications and descriptions subject to change without notice.
LIMITED WARRANTY
SonicWALL, Inc. warrants the SonicWALL Internet Security Appliance (the Product) for one (1)
year from the date of purchase against defects in materials and workmanship. If there is a
defect in the hardware, SonicWALL will replace the product at no charge, provided that it is
returned to SonicWALL with transportation charges prepaid. A Return Materials Authorization
(RMA) number must be displayed on the outside of the package for the product being returned
for replacement or the product will be refused. The RMA number can be obtained by calling
SonicWALL Customer Service between the hours of 8:30 AM and 5:30 PM Pacific Standard
Time, Monday through Friday.
Phone:[phone]
Fax:[phone]
Web: <http://www.sonicwall.com/support>
This warranty does not apply if the Product has been damaged by accident, abuse, misuse, or
misapplication or has been modified without the written permission of SonicWALL.
In no event shall SonicWALL, Inc. or its suppliers be liable for any damages whatsoever
(including, without limitation, damages for loss of profits, business interruption, loss of
information, or other pecuniary loss) arising out of the use of or inability to use the Product.
Some states do not allow the exclusion or limitation of implied warranties or liability for
incidental or consequential damages, so the above limitation or exclusion can not apply to you.
Where liability can not be limited under applicable law, the SonicWALL liability shall be limited
to the amount you paid for the Product. This warranty gives you specific legal rights, and you
can have other rights which vary from state to state.
By using this Product, you agree to these limitations of liability.

Page 6 SonicWALL TELE3 SP Administrator’s Guide
THIS WARRANTY AND THE REMEDIES SET FORTH ABOVE ARE EXCLUSIVE AND IN
LIEU OF ALL OTHER WARRANTIES, ORAL OR WRITTEN, EXPRESS OR IMPLIED.
No dealer, agent, or employee of SonicWALL is authorized to make any extension or addition
to this warranty.
About this Guide
Thank you for purchasing the SonicWALL SonicWALL Internet Security appliance. The
SonicWALL protects your PC from attacks and intrusions, filters objectional Web sites, provides
private VPN connections to business partners and remote offices, and offers a centrally-
managed defense against software viruses.
This manual covers the configuration of the SonicWALL Internet Security appliance features.
For complete installation information, refer to the SonicWALL Internet Security Appliance
Installation Guide.
Organization of This Guide
Chapter 1, Introduction, describes the features and applications of the SonicWALL.
Chapter 2, Managing Your SonicWALL, provides a brief overview of the SonicWALL Web
Management Interface.
Chapter 3, Network Settings, describes the configuration of the SonicWALL IP settings, time,
and password.
Chapter 4, Logging and Alerting, illustrates the SonicWALL logging, alerting, and reporting
features.
Chapter 5, Content Filtering and Blocking, describes SonicWALL Web content filtering,
including subscription updates and customized Web blocking.
Chapter 6, Web Management Tools, provides directions to restart the SonicWALL, import
and export settings, upload new firmware, and perform diagnostic tests.
Chapter 7, Network Access Rules, explains how to permit and block traffic through the
SonicWALL, set up servers, and enable remote management.
Chapter 8, Advanced Features, describes advanced SonicWALL settings, such as One-to-One
NAT and Automatic Web Proxying.
Chapter 9, DHCP Server, describes the configuration and setup of the SonicWALL DHCP
server.
Chapter 10, SonicWALL VPN, explains how to create a VPN tunnel between two SonicWALLs
and creating a VPN tunnel from the VPN client to the SonicWALL.
Chapter 11, High Availabilty, describes the configuration and setup of two SonicWALL Internet
security appliances (primary and backup) for a High Availibility pair. SonicWALL High
Availability eliminates network downtime by allowing the configuration of two SonicWALLs
(one primary and one backup) as a High Availability pair.
preface.fm Page 6 Wednesday, June 12, 2002 10:48 AM

Page 7
Chapter 12, SonicWALL Options and Upgrades, presents a brief summary of the
SonicWALL's subscription services, firmware upgrades and other options.
Chapter 13, Hardware, provides a description of the front and back of the TELE3 SP, including
LED lights and ports.
Chapter 14,Troubleshooting Guide, shows solutions to commonly encountered problems.
Appendix A, Technical Specifications, lists the SonicWALL specifications.
Appendix B, SonicWALL Support Solutions, descriptions of available support packages from
SonicWALL.
Appendix C, Introduction to Networking, provides an overview of the Internet, TCP/IP
settings, IP security, and other general networking topics.
Appendix D, IP Port Numbers, offers information about IP port numbering.
Appendix E, Configuring TCP/IP Settings, provides instructions for configuring your
Management Station's IP address.
Appendix F, Erasing the Firmware, describes the firmware erase procedure.
Appendix G, Configuring RADIUS and ACE Servers, vendor-specific configuration
instructions for RADIUS and ACE servers. The appendix also includes a RADIUS Attributes
Dictionary.
Appendix H, Regulatory Compliance, presents important emissions standards approvals and
EMC information.
SonicWALL Technical Support
For fast resolution of technical questions, please visit the SonicWALL Tech Support Web site at
<http://www.sonicwall.com/support>. There, you will find resources to resolve most technical
issues and a Web request form to contact one of the SonicWALL Technical Support engineers.
preface.fm Page 7 Wednesday, June 12, 2002 10:48 AM

Page 8 SonicWALLTELE3 SP Administrator’s Guide
1 Introduction
Your SonicWALL TELE3 SP (Smart Path) Internet Security
Appliance
The SonicWALL TELE3 SP (Smart Path) provides a complete security solution that protects your
network from attacks, intrusions, and malicious tampering. In addition, the SonicWALL filters
objectionable Web content and logs security threats. SonicWALL VPN provides secure,
encrypted communications to business partners and branch offices.
The SonicWALL TELE3 SP uses stateful packet inspection to ensure secure firewall filtering.
Stateful packet inspection is widely considered to be the most effective method of filtering IP
traffic. MD5 authentication is used to encrypt communications between your Management
Station and the SonicWALL Web Management Interface. MD5 Authentication prevents
unauthorized users from detecting and stealing the SonicWALL password as it is sent over your
network.
SonicWALL Internet Security Appliance Functional Diagram
The following figure illustrates the SonicWALL Internet Security Appliance functions.

Introduction Page 9
By default, the SonicWALL TELE3 SP allows outbound access from the LAN to the Internet and
blocks inbound access from the Internet to the LAN. Users on the Internet are restricted from
accessing resources on the LAN unless they are authorized remote users or Network Access
Rules were created to allow inbound access.
SonicWALL TELE3 SP Internet Security Appliance Features
Internet Security
•ICSA-Certified Firewall
After undergoing a rigorous suite of tests to expose security vulnerabilities, SonicWALL
Internet security appliances have received Firewall Certification from ICSA, the
internationally-accepted authority on network security. The SonicWALL uses stateful packet
inspection, the most effective method of packet filtering, to protect your LAN from hackers
and vandals on the Internet.
•Hacker Attack Prevention
The SonicWALL automatically detects and thwarts Denial of Service (DoS) attacks such as
Ping of Death, SYN Flood, LAND Attack, and IP Spoofing.
•Network Address Translation (NAT)
Network Address Translation (NAT) translates the IP addresses used on your private LAN to
a single, public IP address that is used on the Internet. NAT allows multiple computers to
access the Internet, even if only one IP address has been provided by your ISP.
•Network Access Rules
The default Network Access Rules allow traffic from the LAN to the Internet and block traffic
from the Internet to the LAN. You can create additional Network Access Rules that allow
inbound traffic to network servers, such as Web and mail servers, or that restrict outbound
traffic to certain destinations on the Internet.
•AutoUpdate
The SonicWALL maintains the highest level of security by automatically notifying you when
new firmware is released. When new firmware is available, the SonicWALL Web
Management Interface displays a link to download and install the latest firmware. The
SonicWALL also sends an e-mail with firmware release notes.
•WAN Failover using a V.90 Modem Port
The WAN Failover feature provides an alternate means of accessing the Internet when your
“always on” broadband connection loses its connection. This unique feature allows the
SonicWALL TELE3 SP to failover to a dial-up Internet connection when the WAN Ethernet
connection loses its connectivity.
•SNMP Support
SNMP (Simple Network Management Protocol) is a network protocol used over User
Datagram Protocol (UDP) that allows network administrators to monitor the status of the
SonicWALL Internet Security appliances and receive notification of any critical events as
they occur on the network.

Page 10 SonicWALLTELE3 SP Administrator’s Guide
Content Filtering
•SonicWALL Content Filtering Overview
You can use the SonicWALL Web content filtering to enforce your company's Internet
access policies. The SonicWALL blocks specified categories, such as violence or nudity,
using an optional Content Filter List. Users on your network can bypass the Content Filter
List by authenticating with a unique user name and password.
•Content Filter List Updates (optional)
Since content on the Internet is constantly changing, the SonicWALL automatically updates
the optional Content Filter List every week to ensure that access restrictions to new and
relocated Websites and newsgroups are properly enforced.
•Log and Block or Log Only
You can configure the SonicWALL to log and block access to objectional Web sites, or to
log inappropriate usage without blocking Web access.
•Filter Protocols
In addition to filtering access to Web sites, the SonicWALL can also block Newsgroups,
ActiveX, Java, Cookies, and Web Proxies.
Logging and Reporting
•Log Categories
You can select the information you wish to display in the SonicWALL event log. You can
view the event log from the SonicWALL Web Management Interface or receive the log as
an e-mail file.
•Syslog Server Support
In addition to the standard screen log, the SonicWALL can write detailed event log
information to an external Syslog server. Syslog is the industry-standard method to capture
information about network activity.
•ViewPoint Reporting (optional)
Monitoring critical network events and activity, such as security threats, inappropriate Web
use, and bandwidth levels, is an essential component of network security. SonicWALL
ViewPoint compliments the SonicWALL security features by providing detailed and
comprehensive reports of network activity.
SonicWALL ViewPoint is a software application that creates dynamic, Web-based network
reports. ViewPoint reporting generates both real-time and historical reports to offer a
complete view of all activity through your SonicWALL Internet security appliance.
•E-mail Alerts
The SonicWALL can be configured to send alerts of high-priority events, such as attacks,
system errors, and blocked Web sites. When these events occur, alerts can be immediately
sent to an e-mail address or e-mail pager.

Introduction Page 11
Dynamic Host Configuration Protocol (DHCP)
•DHCP Server
The DHCP Server offers centralized management of TCP/IP client configurations, including
IP addresses, gateway addresses, and DNS addresses. Upon startup, each network client
receives its TCP/IP settings automatically from the SonicWALL DHCP Server.
•DHCP Client
DHCP Client allows the SonicWALL to acquire TCP/IP settings (such as IP address, gateway
address, DNS address) from your ISP. This is necessary if your ISP assigns you a dynamic
IP address.
•DHCP over VPN
DHCP over VPN allows a Host (DHCP Client) behind a SonicWALL obtain an IP address lease
from a DHCP server at the end of a VPN tunnel. In some network deployments, it is desirable
to have all VPN networks residing in one IP subnet address space. This facilitates address
administration for the networks using VPN tunnels.
Installation and Configuration
•Installation Wizard
The SonicWALL Installation Wizard helps quickly install and configure the SonicWALL.
•Online help
SonicWALL help documentation is built into the SonicWALL Web Management Interface for
easy access during installation and management.
IPSec VPN
•SonicWALL VPN
SonicWALL VPN provides a simple, secure tool that enables corporate offices and business
partners to connect securely over the Internet. By encrypting data, SonicWALL VPN
provides private communications between two or more sites without the expense of leased
site-to-site lines.
•VPN Client Software for Windows
Mobile users with dial-up Internet accounts can securely access remote network resources
with the SonicWALL VPN Client. The SonicWALL VPN Client establishes a private, encrypted
VPN tunnel to the SonicWALL, allowing users to transparently access network servers from
any location.
Contact SonicWALL, Inc. for information about the Content Filter List, Network
Anti-Virus subscriptions, and other upgrades.
Web: http://www.sonicwall.com
E-mail: [e-mail]
Phone: [phone]
Fax: [phone]

Page 12 SonicWALL TELE3 SP Administrator’s Guide
2 General and Network Settings
This chapter describes the tabs in the General section and the configuration of the SonicWALL
TELE3 SP Network Settings. The Network Settings include the SonicWALL IP settings, the
administrator password, and the time and date. There are three tabs other than Status in the
General section:
•Network
•Time
•Password
Network
Note: The Network Settings change to the dial-up ISP network settings when a WAN Failover
occurs on the SP.
To configure the SonicWALL Network Settings, click General, and then click the Network
tab.
Network Settings
Network Addressing Mode
The Network Addressing Mode menu determines the network address scheme of your
SonicWALL. It includes four options: Standard, NAT Enabled, NAT with DHCP Client, and
NAT with PPPoE.

General and Network Settings Page 13
•Standard mode requires valid IP addresses for all computers on your network, but allows
remote access to authenticated users.
•NAT Enabled mode translates the private IP addresses on the network to the single, valid
IP address of the SonicWALL. Select NAT Enabled if your ISP assigned you only one or
two valid IP addresses.
•NAT with DHCP Client mode configures the SonicWALL to request IP settings from a
DHCP server on the Internet. NAT with DHCP Client is a typical network addressing
mode for cable and DSL customers.
•NAT with PPPoE mode uses PPPoE to connect to the Internet. If desktop software and a
user name and password is required by your ISP, select NAT with PPPoE.
LAN Settings
•SonicWALL LAN IP Address
The SonicWALL LAN IP Address is the IP address assigned to the SonicWALL LAN port.
It is used for managing the SonicWALL. This IP address should be a unique address from
the LAN address range.
•LAN Subnet Mask
The LAN Subnet Mask defines which IP addresses are on the LAN. The default Class C
subnet mask of "255.255.255.0" supports up to 254 IP addresses on the LAN. If the Class
C subnet mask is used, all local area network addresses should contain the same first three
numbers as the SonicWALL LAN IP Address--for example, "192.168.168."
Multiple LAN Subnet Mask Support
Note: This feature does not replace or substitute configuring routes with the Routes tab in the
Advanced section of the SonicWALL. If you have to define a subnet on the other side of a
router, you must define a static route using the Routes tab in the Advanced section.
Multiple LAN Subnet Mask Support facilitates the support of legacy networks incorporating
the SonicWALL, and makes it easier to add additional nodes if the original subnet is full. Before
you can configure multiple local LAN subnets in the SonicWALL, you must have the following
information:
•Network Gateway Address - This is an IP address assigned to the SonicWALL in addition
to the existing LAN IP address. If you have configured your SonicWALL in Standard mode,
the IP address should be the Default Gateway IP address assigned to your Internet router
on the same subnet. All users on the subnet you are configuring must use this IP address
as their default router/gateway address.
•Subnet Mask - This value defines the size, and based upon the Network Gateway entry,
the scope of the subnet. If you are configuring a subnet mask that currently exists on the
LAN, enter the existing subnet mask address into the Subnet Mask field. If you are
configuring a new subnet mask, use a subnet mask that does not overlap any previously
defined subnet masks.

Page 14 SonicWALL TELE3 SP Administrator’s Guide
Note: The SonicWALL cannot be managed from any of the additional Network Gateway
addresses. You must use the IP address set as the LAN IP address of the SonicWALL. Also, you
cannot mix Standard and NAT subnets behind the SonicWALL.
WAN Settings
•WAN Gateway (Router) Address
The WAN Gateway (Router) Address is the IP address of the WAN router or default gateway
that connects your network to the Internet. If you use Cable or DSL, your WAN router is
probably located at your ISP.
If you select NAT with DHCP Client or NAT with PPPoE mode, the WAN Gateway
(Router) Address is assigned automatically.
•SonicWALL WAN IP Address
The SonicWALL WAN IP Address is a valid IP address assigned to the WAN port of the
SonicWALL. This address should be assigned by your ISP.
If you select NAT Enabled mode, this is the only address seen by users on the Internet
and all activity appears to originate from this address.
If you select NAT with DHCP Client, NAT with PPPoE, or NAT with L2TP Client mode,
the SonicWALL WAN IP address is assigned automatically.
If you select Standard mode, the SonicWALL WAN IP Address is the same as the
SonicWALL LAN IP Address.
•WAN/LAN Subnet Mask
The WAN/LAN Subnet Mask determines which IP addresses are located on the WAN.
This subnet mask should be assigned by your ISP.
If you select NAT with DHCP Client, NAT with PPPoE, or NAT with L2TP Client mode,
the WAN/LAN Subnet Mask is assigned automatically.
If you select Standard mode, the WAN/LAN Subnet Mask is the same as the LAN
Subnet Mask.
DNS Settings
•DNS Servers
DNS Servers, or Domain Name System Servers, are used by the SonicWALL for diagnostic
tests with the DNS Lookup Tool, and for upgrade and registration functionality. DNS
Server addresses should be assigned by your ISP.
If you select NAT with DHCP Client or NAT with PPPoE mode, the DNS Server
addresses is assigned automatically.
Note: The SonicWALL does not relay DNS settings to the LAN; you must enable and
configure the SonicWALL DHCP server or manually configure your computer DNS settings
to obtain DNS name resolution.

General and Network Settings Page 15
Standard Configuration
If your ISP provided you with enough IP addresses for all the computers and network devices
on your LAN, enable Standard mode.
To configure Standard addressing mode, complete the following instructions:
1. Select Standard from the Network Addressing Mode menu. Because NAT is disabled,
you must assign valid IP addresses to all computers and network devices on your LAN.
2. Enter a unique, valid IP address from your LAN address range in the SonicWALL LAN IP
Address field. The SonicWALL LAN IP Address is the address assigned to the
SonicWALL LAN and is used for management of the SonicWALL.
3. Enter your network subnet mask in the LAN Subnet Mask field. The LAN Subnet Mask
tells your SonicWALL which IP addresses are on your LAN. The default value,
"255.255.255.0", supports up to 254 IP addresses.
4. Enter your WAN router or default gateway address in the WAN Gateway (Router)
Address field. Your router is the device that connects your network to the Internet. If you
use Cable or DSL, your WAN router is located at your ISP.
5. Enter your DNS server IP address(es) in the DNS Servers field. The SonicWALL uses the
DNS servers for diagnostic tests and for upgrade and registration functionality.
6. Click Update. Once the SonicWALL has been updated, a message confirming the update
is displayed at the bottom of the browser window. Restart the SonicWALL for these
changes to take effect.
NAT Enabled Configuration
Network Address Translation (NAT) connects your entire network to the Internet using a single
IP address. Network Address Translation offers the following:
• Internet access to additional computers on the LAN. Multiple computers can access the In-
ternet even if your ISP only assigned one or two valid IP addresses to your network.
• Additional security and anonymity because your LAN IP addresses are invisible to the out-
side world.
If your ISP hasn't provided enough IP addresses for all machines on your LAN, enable NAT and
assign your network a private IP address range. You should use addresses from one of the
following address ranges on your private network:
10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255
192.168.0.0 - 192.168.255.255
Note: If your network address range uses valid TCP/IP addresses, Internet sites within that
range are not accessible from the LAN. For example, if you assign the address range 199.2.23.1
- 199.2.23.255 to your LAN, a Web server on the Internet with the address of 199.2.23.20 is
not accessible.

Page 16 SonicWALL TELE3 SP Administrator’s Guide
When NAT is enabled, users on the Internet cannot access machines on the LAN unless they
have been designated as Public LAN Servers.
To enable Network Address Translation (NAT), complete the following instructions.
1. Select NAT Enabled from the Network Addressing Mode menu in the Network
window.
2. Enter a unique IP address from your LAN address range in the SonicWALL LAN IP
Address field. The SonicWALL LAN IP Address is the address assigned to the SonicWALL
LAN and is used for management of the SonicWALL.
3. Enter your network subnet mask in the LAN Subnet Mask field. The LAN Subnet Mask
tells the SonicWALL which IP addresses are on your LAN. Use the default value,
"255.255.255.0", if there are less than 254 computers on your LAN.
4. Enter your WAN router or default gateway address in the WAN Gateway (Router)
Address field. This is the device that connects your network to the Internet. If you use
Cable or DSL, your WAN router is probably located at your ISP.
5. Enter a valid IP address assigned by your ISP in the SonicWALL WAN IP (NAT Public)
Address field. Because NAT is enabled, all network activity appears to originate from this
address.
6. Enter your WAN subnet mask in the WAN/LAN Subnet Mask field. This subnet mask
should be assigned by your ISP.

General and Network Settings Page 17
7. Enter your DNS server IP address(es) in the DNS Servers field. The SonicWALL uses these
DNS servers for diagnostic tests and for upgrade and registration functionality.
8. Click Update. Once the SonicWALL has been updated, a message confirming the update
is displayed at the bottom of the browser window. Restart the SonicWALL for these
changes to take effect.
If you enable Network Address Translation, designate the SonicWALL LAN IP Address as
the gateway address for computers on your LAN. Consider the following example:
• The SonicWALL WAN Gateway (Router) Address is "10.1.1.1".
• The SonicWALL WAN IP (NAT Public) Address is "10.1.1.25".
• The private SonicWALL LAN IP Address is "192.168.168.1".
• Computers on the LAN have private IP addresses ranging from "192.168.168.2" to
"192.168.168.255".
In this example, "192.168.168.1", the SonicWALL LAN IP Address, is used as the gateway or
router address for all computers on the LAN.

Page 18 SonicWALL TELE3 SP Administrator’s Guide
NAT with DHCP Client Configuration
The SonicWALL can receive an IP address from a DHCP server on the Internet. If your ISP did
not provide you with a valid IP address, and instructed you to set your network settings to
obtain an IP address automatically, enable NAT with DHCP Client. NAT with DHCP Client
mode is typically used with Cable and DSL connections.
To obtain IP settings dynamically, complete the following instructions.
1. Select NAT with DHCP Client from the Network Addressing Mode menu.
2. Enter a unique IP address from your LAN address range in the SonicWALL LAN IP
Address field. The SonicWALL LAN IP Address is the address assigned to the SonicWALL
LAN and is used for management of the SonicWALL.
3. Enter your network subnet mask in the LAN Subnet Mask field. The LAN Subnet Mask
tells your SonicWALL which IP addresses are on your LAN. The default value,
"255.255.255.0", supports up to 254 IP addresses.
4. Click Update. Once the SonicWALL has been updated, a message confirming the update
is displayed at the bottom of the browser window. Restart the SonicWALL for these
changes to take effect.
Note: When NAT is enabled, designate the SonicWALL LAN IP Address as the gateway address
for computers on the LAN.

General and Network Settings Page 19
When your SonicWALL has successfully received a DHCP lease, the Network window displays
the SonicWALL WAN IP settings.
•TheLease Expires value shows when your DHCP lease expires.
•TheWAN Gateway (Router) Address, SonicWALL WAN IP (NAT Public) Address,
WAN/LAN Subnet Mask, and DNS Servers are obtained from a DHCP server on the
Internet.
Note: The SonicWALL does not relay DNS settings to the LAN; you must enable and configure
the SonicWALL DHCP server or manually configure DNS settings on your computers to obtain
DNS name resolution.
In the WAN/LAN Settings section of Network, you can Renew and Release the
SonicWALL WAN IP (NAT Public) Address lease. When you click on Renew, the SonicWALL
renews the IP address used for the WAN IP address. Click Release, and the lease is released
with the DHCP server.
NAT with PPPoE Configuration
The SonicWALL can use Point-to-Point Protocol over Ethernet to connect to the Internet. If your
ISP requires the installation of desktop software and user name and password authentication
to access the Internet, enable NAT with PPPoE.
To configure NAT with PPPoE, complete the following instructions.
1. Select NAT with PPPoE from the Network Addressing Mode menu.