SMC Networks Barricade SMC7004AWBR User manual

Barricade
™
Wireless
Broadband Router
Wireless Broadband Router
◆ Internet access via –
• 10 Mbps WAN port connection to xDSL/Cable modem, or
• RS-232 console port connection to ISDN/PSTN modem
◆ Home networking via –
• Three 10/100 Mbps Ethernet switch ports, or
• 11 Mbps wireless interface
◆ Built-in Print Server
◆ Automatic IP configuration with DHCP
◆ Firewall – client privileges, hacker prevention, NAT
◆ Multi-user access (up to 253), single-user account
◆ Virtual server with network address translation
◆ Virtual Private Network using PPTP, L2TP, IPSec
User Guide
SMC7004AWBR

6 Hughes
Irvine, CA 92618
Phone: [phone]
Barricade™
Wireless Broadband Router
User Guide
From SMC’s Barricade line of Broadband Routers
August 2001
Part Number: 01-111234-001 R02

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 © 2001 by
SMC Networks, Inc.
6 Hughes
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.

v
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/smc/pages_html/support.html
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
vi
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.
6 Hughes
Irvine, CA 92618

vii
C OMPLIANCES
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
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:
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

viii
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.
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]
* 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: * EN 60950 (A1/1992; A2/1993; A3/1993; A4/1995; A11/1997)

L IMITED W ARRANTY
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 Flüssigoder 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 Überhit-
zung 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.
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
x
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 Gerät gelangen. Dies könnte einen Brand bzw. elektrischen Schlag aus-
lösen.
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, daß die Stromversorgung dieses Gerätes nach der EN 60950
geprüft ist. Ausgangswerte der Stromversorgung sollten die Werte von AC
7,5-8V, 50-60Hz nicht über oder unterschreiten sowie den minimalen Strom von
1A nicht unterschreiten.
Der arbeitsplatzbezogene Schalldruckpegel nach DIN 45 635 Teil 1000 beträgt
70dB(A) oder weniger.

xi
T ABLE OF C ONTENTS
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
About the Wireless Barricade . . . . . . . . . . . . . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Connect the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Basic Installation Procedure . . . . . . . . . . . . . . . . . . . . . 2-6
Attach to Your Network Using Ethernet Cabling . . . 2-7
Attach to Your Network Using Radio Signals . . . . . . 2-8
Attach the Wireless Barricade to the Internet . . . . . 2-10
Connect the Wireless Barricade to a Printer . . . . . . 2-10
Connecting the Power Adapter . . . . . . . . . . . . . . . 2-11
Verify Port Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
3 Configuring Client PCs . . . . . . . . . . . . . . . . . . . . 3-1
TCP/IP Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Printer Client Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
4 Configuring the Barricade . . . . . . . . . . . . . . . . . 4-1
Navigating the Web Browser Interface . . . . . . . . . . . . . . . . . . 4-2
Setting a Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Making Configuration Changes . . . . . . . . . . . . . . . . . . . 4-2
Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Networking and Client Services . . . . . . . . . . . . . . . . . . . . . . . 4-5
Change Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Set Time Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
LAN Gateway and DHCP Settings . . . . . . . . . . . . . . . . . 4-7
WAN Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Dynamic IP Address – DHCP . . . . . . . . . . . . . . . . . 4-9
Static IP Address – Fixed IP . . . . . . . . . . . . . . . . . . 4-9
PPP over Ethernet – PPPoE . . . . . . . . . . . . . . . . . . 4-10
Dial-up on Demand – Modem . . . . . . . . . . . . . . . 4-11

T ABLE OF C ONTENTS
xii
DNS Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Wireless Configuration . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Channel and SSID . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Configuring Client Services . . . . . . . . . . . . . . . . . . . . 4-16
Firewall Protection . . . . . . . . . . . . . . . . . . . . . . . 4-16
Virtual Server . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Enabling Special Applications . . . . . . . . . . . . . . . 4-18
Client Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
MAC Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
Miscellaneous Settings – Misc . . . . . . . . . . . . . . . 4-23
Viewing Network and Device Status . . . . . . . . . . . . . . . . . . 4-25
Using System Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
5 Configuring Client TCP/IP . . . . . . . . . . . . . . . . . . 5-1
Installing TCP/IP Protocol in Your PC . . . . . . . . . . . . . . . . . . 5-1
Setting TCP/IP to Work with the Barricade . . . . . . . . . . . . . . 5-3
Dynamic IP Allocation via a DHCP Server . . . . . . . . . . 5-4
Manual IP Configuration . . . . . . . . . . . . . . . . . . . . . . . 5-5
Verifying Your TCP/IP Connection . . . . . . . . . . . . . . . . 5-6
6 Configuring Printer Services . . . . . . . . . . . . . . . . 6-1
Install the Printer Port Monitor . . . . . . . . . . . . . . . . . . . . . . . 6-1
Configure the Print Server . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Configure the Network Printer in
Windows 95/98/ME/2000 . . . . . . . . . . . . . . . . . . 6-4
Configure the Network Printer in Windows NT . . . . . . . 6-6
Configure the Network Printer in Unix Systems . . . . . . 6-8

T ABLE OF C ONTENTS
xiii
APPENDICES:
A Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . .A-1
B Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-1
Ethernet Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Twisted-pair Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Straight-through Cable . . . . . . . . . . . . . . . . . . . . . . B-2
Crossover Cable . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
RJ-45 Port Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Serial Port Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . B-4
DB-9 Port Pin Assignments . . . . . . . . . . . . . . . . . . . . . B-4
Serial Port to 9-Pin COM Port on PC . . . . . . . . . . . . . . . B-5
Serial Port to 25-Pin DCE Port on Modem . . . . . . . . . . . B-5
Serial Port to 25-Pin DTE Port on PC . . . . . . . . . . . . . . B-5
Printer Port Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . B-6
DB-25 Printer Port Pin Assignments . . . . . . . . . . . . . . . B-6
C Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-1
D Ordering Information . . . . . . . . . . . . . . . . . . . . D-1

T ABLE OF C ONTENTS
xiv

1-1
C HAPTER 1
I NTRODUCTION
Congratulations on your purchase of the Barricade™Wireless
Broadband Router. SMC is proud to provide you with a powerful
yet simple communication device for connecting your local area
network (wired or wireless LAN) to the Internet. For those who
want to surf the Internet at the lowest possible cost, this
Broadband Router provides a convenient and powerful solution.
About the Wireless Barricade
The Wireless Barricade provides Internet access to multiple users
by sharing a single-user account. It serves as a wireless Access
Point, and includes a
dual-port WAN interface which allows you to
connect to an xDSL or Cable
modem, ISDN TA or PSTN analog
modem. The
Wireless Barricade provides extensive firewall
protection and Virtual Private Network (VPN) services. It also
provides print services for any client attached to a LAN port.
The Wireless Barricade supports dial-on-demand for ISDN/PSTN
service, automatically connecting to the Internet when there are
requests and terminating the connection if no further requests
occur. This dual-port design also supports fail-over Internet access
through the secondary WAN port (i.e., the serial port can be used
for primary or backup Internet access).
This new Wireless Barricade technology provides many
cost-effective functions and management benefits. 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 Mbps
WAN port
•Internet connection to ISDN TA or PSTN modem via an RS-232
console 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)
•Built-in Print Server for any client attached to the LAN
•DHCP for dynamic IP configuration, and DNS for domain name
mapping
•Firewall with client privileges, hacker prevention, 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)
•Virtual Private Network support using PPTP, L2TP or IPSec
pass-through
•User-definable application sensing tunnel supports applications
requiring multiple connections
•Supports CHAP authentication protocol for dial-up
identification

I NTRODUCTION
1-3
•Supports PPP dial-in connection using standard dial-up
program
•Easy setup through a Web browser on any operating system
that supports TCP/IP
•Compatible with all popular Internet applications
Applications
Many advanced applications are provided by the Wireless Barricade,
such as:
•FlexibleLANAccess
The Wireless Barricade 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, Cable,
ISDN or PSTN connection. Since many DSL providers use
PPPoE to establish communications with end users, the
Wireless Barricade includes a built-in client for this protocol,
eliminating the need to install this service on your computer.
• Shared IP Address
The Wireless Barricade 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
• Virtual Server
If you have a fixed IP address, you can set up the Wireless
Barricade to act as a virtual host for network address
translation. 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 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.
• User-Definable Application Sensing Tunnel
You can define special applications that require multiple
connections such as Internet gaming, videoconferencing, and
Internet telephony. The Wireless Barricade can then sense the
application type and open a multi-port tunnel for it.
• DMZ Host Support
Allows a networked computer to be fully exposed to the
Internet. This function is used when the special application
sensing tunnel feature is insufficient to allow an application to
function correctly.
• Security
The Wireless Barricade 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’s 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.

I NTRODUCTION
1-5
• Virtual Private Network
The Wireless Barricade supports three of the most commonly
used VPN protocols –PPTP, L2TP 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 are
briefly described below.
•Point-to-Point Tunneling Protocol –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.
•Layer Two Tunneling Protocol –Includes most of the
features provided by PPTP, but has less overhead and is
more suited for managed networks.
•IP Security –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