SMC Networks Barricade Plus User manual

Barricade
™
Plus
Wireless Cable/DSL Broadband Router with VPN
Wireless Cable/DSL Broadband Router with VPN
◆ EZ 3-Click Installation Wizard
◆ IEEE 802.11b Compliant
◆ Wireless Operation at 11, 5.5, 2, or 1 Mbps
◆ Internet Access via –
• 10/100 Mbps WAN port connection to xDSL/Cable modem
◆ Home Networking via –
• Three 10/100 Mbps Ethernet switch ports with MDI/MDI-X
auto-negotiation
◆ Configuarable Parental Control by limiting access to
web sites with URL and keyword blocking
◆ Stateful Packet Inspection (SPI) Advanced Firewall
Protection
◆ Client Privileges, Intrusion Detection, NAT
◆ Built-in VPN Tunneling Capability
User Guide
SMC7004WFW

38 Tesla
Irvine, CA 92618
Phone: [phone]
Barricade™ Plus Wireless
Cable/DSL Broadband Router
User Guide
From SMC’s Barricade line of Broadband Routers
May 2002
Revision Number: R01

Copyright
Information furnished by SMC Networks, Inc. (SMC) is believed to be accurate and reliable.
However, no responsibility is assumed by SMC for its use, nor for any infringements of patents or
other rights of third parties which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of SMC. SMC reserves the right to change specifications
at any time without notice.
Copyright © 2002 by
SMC Networks, Inc.
38 Tesla
Irvine, CA 92618
All rights reserved. Printed in Taiwan
Trademarks:
SMC is a registered trademark; and Barricade is a trademark of SMC Networks, Inc. Other product and
company names are trademarks or registered trademarks of their respective holders.

i
L IMITED W ARRANTY
Limited Warranty Statement: SMC Networks, Inc. (“SMC”) warrants its products to
be free from defects in workmanship and materials, under normal use and service, for
the applicable warranty term. All SMC products carry a standard 90-day limited
warranty from the date of purchase from SMC or its Authorized Reseller. SMC may,
at its own discretion, repair or replace any product not operating as warranted with a
similar or functionally equivalent product, during the applicable warranty term. SMC
will endeavor to repair or replace any product returned under warranty within 30 days
of receipt of the product.
The standard limited warranty can be upgraded to a Limited Lifetime* warranty by
registering new products within 30 days of purchase from SMC or its Authorized
Reseller. Registration can be accomplished via the enclosed product registration card or
online via the SMC web site. Failure to register will not affect the standard limited
warranty. The Limited Lifetime warranty covers a product during the Life of that
Product, which is defined as the period of time during which the product is an “Active”
SMC product. A product is considered to be “Active” while it is listed on the current
SMC price list. As new technologies emerge, older technologies become obsolete and
SMC will, at its discretion, replace an older product in its product line with one that
incorporates these newer technologies. At that point, the obsolete product is
discontinued and is no longer an “Active” SMC product. A list of discontinued
products with their respective dates of discontinuance can be found at:
http://www.smc.com/index.cfm?action=customer_service_warranty.
All products that are replaced become the property of SMC. Replacement products
may be either new or reconditioned. Any replaced or repaired product carries either a
30-day limited warranty or the remainder of the initial warranty, whichever is longer.
SMC is not responsible for any custom software or firmware, configuration
information, or memory data of Customer contained in, stored on, or integrated with
any products returned to SMC pursuant to any warranty. Products returned to SMC
should have any customer-installed accessory or add-on components, such as expansion
modules, removed prior to returning the product for replacement. SMC is not
responsible for these items if they are returned with the product.
Customers must contact SMC for a Return Material Authorization number prior to
returning any product to SMC. Proof of purchase may be required. Any product
returned to SMC without a valid Return Material Authorization (RMA) number
clearly marked on the outside of the package will be returned to customer at
customer’s expense. For warranty claims within North America, please call our
toll-free customer support number at [phone]. Customers are responsible for all
shipping charges from their facility to SMC. SMC is responsible for return shipping
charges from SMC to customer.

L IMITED W ARRANTY
ii
WARRANTIES EXCLUSIVE: IF AN SMC PRODUCT DOES NOT OPERATE AS
WARRANTED ABOVE, CUSTOMER’S SOLE REMEDY SHALL BE REPAIR OR
REPLACEMENT OF THE PRODUCT IN QUESTION, AT SMC’S OPTION. THE
FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN
LIEU OF ALL OTHER WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED,
EITHER IN FACT OR BY OPERATION OF LAW, STATUTORY OR OTHERWISE,
INCLUDING WARRANTIES OR CONDITIONS OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE. SMC NEITHER ASSUMES NOR
AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT ANY OTHER
LIABILITY IN CONNECTION WITH THE SALE, INSTALLATION,
MAINTENANCE OR USE OF ITS PRODUCTS. SMC SHALL NOT BE LIABLE
UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE THE
ALLEGED DEFECT IN THE PRODUCT DOES NOT EXIST OR WAS CAUSED BY
CUSTOMER’S OR ANY THIRD PERSON’S MISUSE, NEGLECT, IMPROPER
INSTALLATION OR TESTING, UNAUTHORIZED ATTEMPTS TO REPAIR, OR
ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE, OR BY
ACCIDENT, FIRE, LIGHTNING, OR OTHER HAZARD.
LIMITATION OF LIABILITY: IN NO EVENT, WHETHER BASED IN CONTRACT
OR TORT (INCLUDING NEGLIGENCE), SHALL SMC BE LIABLE FOR
INCIDENTAL, CONSEQUENTIAL, INDIRECT, SPECIAL, OR PUNITIVE
DAMAGES OF ANY KIND, OR FOR LOSS OF REVENUE, LOSS OF BUSINESS, OR
OTHER FINANCIAL LOSS ARISING OUT OF OR IN CONNECTION WITH THE
SALE, INSTALLATION, MAINTENANCE, USE, PERFORMANCE, FAILURE, OR
INTERRUPTION OF ITS PRODUCTS, EVEN IF SMC OR ITS AUTHORIZED
RESELLER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
SOME STATES DO NOT ALLOW THE EXCLUSION OF IMPLIED WARRANTIES
OR THE LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR
CONSUMER PRODUCTS, SO THE ABOVE LIMITATIONS AND EXCLUSIONS
MAY NOT APPLY TO YOU. THIS WARRANTY GIVES YOU SPECIFIC LEGAL
RIGHTS, WHICH MAY VARY FROM STATE TO STATE. NOTHING IN THIS
WARRANTY SHALL BE TAKEN TO AFFECT YOUR STATUTORY RIGHTS.
* SMC will provide warranty service for one year following discontinuance from the active
SMC price list. Under the limited lifetime warranty, internal and external power supplies, fans,
and cables are covered by a standard one-year warranty from date of purchase.
SMC Networks, Inc.
38 Tesla
Irvine, CA 92618

iii
COMPLIANCES
FCC - Class B
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 residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with instructions, may cause harmful interference to
radio communications. However, there is no guarantee that the interference will not
occur in a particular installation. If this equipment does cause harmful interference to
radio or 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 the receiving antenna
• Increase the separation between the equipment and 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
FCC Caution: To assure continued compliance, (example - use only shielded
interface cables when connecting to computer or peripheral devices). Any changes
or modifications not expressly approved by the party responsible for compliance
could void the user’s authority to operate this equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
CAUTION STATEMENT:
FCC RF Radiation Exposure Statement
This equipment complies with FCC RF radiation exposure limits set forth for an
uncontrolled environment. This equipment should be installed and operated with a
minimum distance of 20 centimeters between the radiator and your body. This
transmitter must not be co-located or operating in conjunction with any other
antenna or transmitter.

C OMPLIANCES
iv
EC Conformance Declaration - Class B
SMC contact for these products in Europe is:
SMC Networks Europe,
Edificio Conata II,
Calle Fructuós Gelabert 6-8, 2o, 4a,
08970 - Sant Joan Despí,
Barcelona, Spain.
This information technology equipment complies with the requirements of the Council
Directive 89/336/EEC on the Approximation of the laws of the Member States relating to
Electromagnetic Compatibility and 73/23/EEC for electrical equipment used within certain
voltage limits and the Amendment Directive 93/68/EEC. For the evaluation of the
compliance with these Directives, the following standards were applied:
Industry Canada - Class B
This digital apparatus does not exceed the Class B limits for radio noise emissions from
digital apparatus as set out in the interference-causing equipment standard entitled “Digital
Apparatus,” ICES-003 of the Department of Communications.
Cet appareil numérique respecte les limites de bruits radioélectriques applicables aux appareils
numériques de Classe B prescrites dans la norme sur le matériel brouilleur: “Appareils
Numériques,” NMB-003 édictée par le ministère des Communications.
RFI
Emission: * Limit class B according to EN 55022:1998
* Limit class A for harmonic current emission according to EN 61000-3-2/
1995
* Limitation of voltage fluctuation and flicker in low-voltage supply system
according to EN 61000-3-3/1995
Immunity: * Product family standard according to EN 55024:1998
* Electrostatic Discharge according to EN 61000-4-2:1995 (Contact Discharge:
±4 kV, Air Discharge: ±8 kV)
* Radio-frequency electromagnetic field according to EN 61000-4-3: 1996 (80
- 1000MHz with 1kHz AM 80% Modulation: 3V/m)
* Electrical fast transient/burst according to EN 61000-4-4:1995(AC/DC
power supply: ±1kV, Data/Signal lines: ±0.5kV)
* Surge immunity test according to EN 61000-4-5:1995(AC/DC Line to Line:
±1kV, AC/DC Line to Earth: ±2kV )
* Immunity to conducted disturbances, Induced by radio-frequency fields: EN
61000-4-6:1996(0.15 - 80MHz with 1kHz AM 80% Modulation: 3V/m)
* Power frequency magnetic field immunity test according to EN
61000-4-8:1993(1A/m at frequency 50Hz)
* Voltage dips, short interruptions and voltage variations immunity test
according to EN 61000-4-11:1994(>95% Reduction @10ms, 30% Reduction
@500ms, >95% Reduction @5000ms)
LVD: * EN60950(A1/1992; A2/1993; A3/1993; A4/1995; A11/1997)

C OMPLIANCES
v
Japan VCCI Class B
Australia AS/NZS 3548 (1995) - Class B
SMC contact for products in Australia is:
SMC Communications Pty. Ltd.
Suite 18, 12 Tryon Road,
Lindfield NSW2070,
Phone: [phone]
Fax: [phone]

C OMPLIANCES
vi
Safety Compliance
Underwriters Laboratories Compliance Statement
Important! Before making connections, make sure you have the correct cord set. Check it
(read the label on the cable) against the following:
The unit automatically matches the connected input voltage. Therefore, no additional
adjustments are necessary when connecting it to any input voltage within the range marked
on the rear panel.
Wichtige Sicherheitshinweise (Germany)
1. Bitte lesen Sie diese Hinweise sorgfältig durch.
2. Heben Sie diese Anleitung für den späteren Gebrauch auf.
3. Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen. Verwenden Sie keine Flüssi-
goder Aerosolreiniger. Am besten eignet sich ein angefeuchtetes Tuch zur Reinigung.
4. Die Netzanschlu ßsteckdose soll nahe dem Gerät angebracht und leicht zugänglich sein.
5. Das Gerät ist vor Feuchtigkeit zu schützen.
6. Bei der Aufstellung des Gerätes ist auf sicheren Stand zu achten. Ein Kippen oder Fallen
könnte Beschädigungen hervorrufen.
7. Die Belüftungsöffnungen dienen der Luftzirkulation, die das Gerät vor Überhitzung
schützt. Sorgen Sie dafür, daß diese Öffnungen nicht abgedeckt werden.
8. Beachten Sie beim Anschluß an das Stromnetz die Anschlußwerte.
9. Verlegen Sie die Netzanschlußleitung so, daß niemand darüber fallen kann. Es sollte auch
nichts auf der Leitung abgestellt werden.
10. Alle Hinweise und Warnungen, die sich am Gerät befinden, sind zu beachten.
11. Wird das Gerät über einen längeren Zeitraum nicht benutzt, sollten Sie es vom Stromnetz
trennen. Somit wird im Falle einer Überspannung eine Beschädigung vermieden.
12. Durch die Lüftungsöffnungen dürfen niemals Gegenstände oder Flüssigkeiten in das
Operating Voltage Cord Set Specifications
120 Volts UL Listed/CSA Certified Cord Set
Minimum 18 AWG
Type SVT or SJT three conductor cord
Maximum length of 15 feet
Parallel blade, grounding type attachment plug rated
15A, 125V
240 Volts (Europe only) Cord Set with H05VV-F cord having three conductors
with minimum diameter of 0.75 mm2
IEC-320 receptacle
Male plug rated 10A, 250V

C OMPLIANCES
vii
Gerät gelangen. Dies könnte einen Brand bzw. elektrischen Schlag auslösen.
13. Öffnen sie niemals das Gerät. Das Gerät darf aus Gründen der elektrischen Sicherheit
nur von authorisiertem Servicepersonal geöffnet werden.
14. Wenn folgende Situationen auftreten ist das Gerät vom Stromnetz zu trennen und von
einer qualifizierten Servicestelle zu überprüfen:
a. Netzkabel oder Netzstecker sind beschädigt.
b. Flüssigkeit ist in das Gerät eingedrungen.
c. Das Gerät war Feuchtigkeit ausgesetzt.
d. Wenn das Gerät nicht der Bedienungsanleitung entsprechend funktioniert oder Sie mit
Hilfe dieser Anleitung keine Verbesserung erzielen.
e. Das Gerät ist gefallen und/oder das Gehäuse ist beschädigt.
f. Wenn das Gerät deutliche Anzeichen eines Defektes aufweist.
15. Stellen Sie sicher, da? die Stromversorgung dieses Ger‰tes nach der EN 60950 gepr¸ft
ist. Ausgangswerte der Stromversorgung sollten die Werte von AC 7,5-8V, 50-60Hz nicht
¸ber oder unterschreiten sowie den minimalen Strom von 1A nicht unterschreiten..
Der arbeitsplatzbezogene Schalldruckpegel nach DIN 45 635 Teil 1000 beträgt 70dB(A) oder
weniger.

C OMPLIANCES
viii

T ABLE OF C ONTENTS
ix
T ABLE OF C ONTENTS
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
About the Wireless Barricade Plus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Description of Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Connect the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Basic Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Verify Port Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
3 Configuring Client PCs . . . . . . . . . . . . . . . . . . . . . . . . 3-1
TCP/IP Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
4 Configuring the Wireless Barricade Plus . . . . . . . . . . 4-1
Navigating the Web Browser Interface . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Making Configuration Changes . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Setup Wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Broadband Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Advanced Setup Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Navigating the Web Browser Interface . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Making Configuration Changes . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
System Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Set Time Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Setting a Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Remote Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Networking and Client Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
WAN Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
DNS Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18

T ABLE OF C ONTENTS
x
LAN Gateway and DHCP Settings . . . . . . . . . . . . . . . . . . . . . . 4-19
Wireless Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
Configuring Client Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
5 Configuring Client TCP/IP . . . . . . . . . . . . . . . . . . . . . 5-1
Installing TCP/IP Protocol in Your PC . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Windows 95/98/ME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Windows 2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Setting TCP/IP to Work with the Wireless Barricade Plus . . . . . . . . . . 5-5
Windows 95/98/ME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Windows 2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Windows XP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Configuring Your Computer with Windows 95/98/ME . . . . . . 5-8
Configuring Your Computer with Windows 2000 . . . . . . . . . . 5-15
Configuring Your Computer with Windows XP . . . . . . . . . . . 5-22
Configuring Your Computer with Windows NT 4.0 . . . . . . . . 5-29
Configuring Your Macintosh Computer . . . . . . . . . . . . . . . . . . 5-36
Dynamic IP Allocation via a DHCP Server . . . . . . . . . . . . . . . 5-43
Manual IP Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-44
Verifying Your TCP/IP Connection . . . . . . . . . . . . . . . . . . . . . 5-45
A Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1
B Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-1
Ethernet Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Twisted-pair Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
RJ-45 Port Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
C Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-1
D Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . D-1

1-1
C HAPTER 1
I NTRODUCTION
Congratulations on your purchase of the Barricade™Plus Wireless Cable/
DSL Broadband Router. SMC is proud to provide you with a powerful yet
simple communication device for connecting your local area network
(LAN) to the Internet. For those who want to surf the Internet in the most
secure way, this Wireless Cable/DSL Broadband Router provides a
convenient and powerful solution.
About the Wireless Barricade Plus
The Wireless Barricade Plus provides Internet access to multiple users by
sharing a single-user account. It serves as a wireless Access Point, and
includes a
10/100Mbps WAN port which allows you to connect to an
xDSL or Cable
modem. The most outstanding feature of the Wireless
Barricade Plus is
its extensive firewall protection and Virtual Private
Network (VPN) services.
This new Wireless Barricade Plus technology provides many secure and
cost-effective functions. It is simple to configure and can be up and
running in minutes.

F EATURES AND B ENEFITS
1-2
Features and Benefits
• Internet connection to xDSL or cable modem via a 10/100 Mbps
WAN port
• Local network connection via 10/100 Mbps Ethernet ports or
11 Mbps wireless interface (supporting up to 128 mobile users)
• 802.11b Compliant – interoperable with multiple vendors
• Provides seamless roaming within 802.11b WLAN environment
• Supports 64-bit and 128-bit WEP (Wired Equivalent Privacy)
• DHCP for dynamic IP configuration, and DNS for domain name
mapping
• Firewall with Stateful Packet Inspection, client privileges, intrusion
detection, VPN, and NAT
• NAT also enables multi-user access with a single-user account,
and virtual server functionality (providing protected access to
Internet services such as Web, FTP, mail and Telnet)
• Supports VPN (Virtual Private Network) tunneling, IPSec and PPTP
• Easy setup through a Web browser on any operating system
that supports TCP/IP
• Compatible with all popular Internet applications

I NTRODUCTION
1-3
Applications
Many advanced applications are provided by the Wireless Barricade Plus,
such as:
• Flexible LAN Access
The Wireless Barricade Plus provides connectivity to 10/
100 Mbps wired devices as well as 11 Mbps wireless mobile users.
The wireless interface makes it easy to create a network in
difficult-to-wire environments, or to provide quick access to
databases for mobile workers.
• Internet Access
This device supports Internet access through an xDSL, or Cable
connection. Since many DSL providers use PPPoE to establish
communications with end users, the Wireless Barricade Plus includes
a built-in client for this protocol, eliminating the need to install this
service on your computer.
• Shared IP Address
The Wireless Barricade Plus provides Internet access for up to 253
users with a shared IP address. Using only one ISP account, multiple
users on your network can browse the Web at the same time.

A PPLICATIONS
1-4
•VirtualServer
If you have a fixed IP address, you can set up the Wireless Barricade
Plus to act as a virtual host using network address translation (NAT).
Remote users access various services at your site using a constant
IP address. Then, depending on the requested service (or port
number), the Wireless Barricade Plus can route the request to the
appropriate server (at another internal IP address). This secures
your network from direct attack by hackers, and provides more
flexible management by allowing you to change internal IP
addresses without affecting outside access to your network.
• DMZ Host Support
Allows a networked computer to be fully exposed to the
Internet.
• Security
The Wireless Barricade Plus supports security features that can deny
Internet access to specified users, or filter all requests for specific
services the administrator does not want to serve. The Wireless
Barricade Plus’ firewall can also block common hacker attacks,
including IP Spoofing, Land Attack, Ping of Death, IP with zero
length, Smurf Attack, UDP port loopback, Snork Attack, TCP null
scan, and TCP SYN flooding.
• Stateful Packet Inspection (SPI)
Stateful Packet Inspection is one of the firewall features provided
by the Wireless Barricade Plus. The SPI ensures that the data coming
into your network was requested by an end node computer on your
network. The Wireless Barricade Plus examines the incoming data and
compares it to a database of trusted information. As traffic leaves
the network, it is defined by certain characteristics. Incoming
information is then compared to these sets of characteristics. If
the incoming data matches the predefined set of characteristics,

I NTRODUCTION
1-5
the incoming traffic is allowed. If no match is found, the
incoming traffic is discarded.
• Virtual Private Network (VPN)
The Wireless Barricade Plus supports two of the most commonly
used VPN protocols – PPTP and IPSec. These protocols allow
remote users to establish a secure connection to their corporate
network. If your service provider supports VPNs, then any of these
protocols can be used to create an authenticated and encrypted
tunnel for passing secure data over the Internet (i.e., a
traditionally shared data network). The VPN protocols
supported by the Wireless Barricade Plus are briefly described below.
• Point-to-Point Tunneling Protocol (PPTP) – Provides a secure
tunnel for remote client access to a PPTP security gateway. PPTP
includes provisions for call origination and flow control required
by ISPs.
• IP Security (IPSec) – Provides IP network-layer encryption. IPSec
can support large encryption networks (such as the Internet) by
using digital certificates for device authentication.

A PPLICATIONS
1-6