SMC Networks Barricade SMC7004ABR User manual

Barricade
™
Broadband Router
10/100 Mbps Broadband Router
◆ Internet access via –
• 10/100 Mbps WAN port connection to xDSL/Cable modem, or
• RS-232 console port connection to ISDN/PSTN modem
◆ Home networking via –
• Four/Eight 10/100 Mbps Ethernet switch ports
◆ 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
SMC7004ABR

38 Te s l a
Irvine, CA 92618
Phone: [phone]
Barricade™
Broadband Router
User Guide
From SMC’s Barricade line of Broadband Routers
February 2002
Revision Number: 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 © 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.

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/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
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.
38 Tesla
Irvine, CA 92618

vii
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
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

C OMPLIANCES
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: * EN60950(A1/1992; A2/1993; A3/1993; A4/1995; A11/1997)

C OMPLIANCES
ix
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 auslösen.
13. Öffnen sie niemals das Gerät. Das Gerät darf aus Gründen der elektrischen Sicher-
heit 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.

T ABLE OF C ONTENTS
xi
T ABLE OF C ONTENTS
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
About the 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Basic Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Attach to Your Network Using Ethernet Cabling . . . 2-7
Attach the Barricade to the Internet . . . . . . . . . . . . . . . 2-8
Connect a Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Connecting the Power Adapter . . . . . . . . . . . . . . . . . . 2-9
Verify Port Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
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 . . . . . . . . . . . . . . . . . . . . . 4-3
Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Networking and Client Services . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Change Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Set Time Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
LAN Gateway and DHCP Settings . . . . . . . . . . . . . . . . . . 4-8
WAN Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Dynamic IP Address – DHCP . . . . . . . . . . . . . . . . . . 4-10

T ABLE OF C ONTENTS
xii
Static IP Address – Fixed IP . . . . . . . . . . . . . . . . . . . . .4-10
PPP over Ethernet – PPPoE . . . . . . . . . . . . . . . . . . . .4-11
Dial-up on Demand – Modem . . . . . . . . . . . . . . . . . . .4-12
DNS Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-13
Configuring Client Services . . . . . . . . . . . . . . . . . . . . . . . .4-14
Firewall Protection . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14
Virtual Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-15
Enabling Special Applications . . . . . . . . . . . . . . . . . . .4-16
Client Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-17
Misc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-18
Viewing Network and Device Status . . . . . . . . . . . . . . . . . . . . . .4-19
Using System Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-20
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
Configuring Your Computer with Windows 95/98/ME . . .5-4
Step 1. Configure TCP/IP Settings . . . . . . . . . . . . . . . .5-4
Step 2. Disable HTTP Proxy . . . . . . . . . . . . . . . . . . . . .5-7
Step 3. Obtain IP Settings from Your Barricade . . . . . .5-9
Configuring Your Computer with Windows 2000 . . . . . .5-11
Step 1. Configure TCP/IP Settings . . . . . . . . . . . . . . .5-11
Step 2. Disable HTTP Proxy . . . . . . . . . . . . . . . . . . . .5-14
Step 3. Obtain IP Settings From Your Barricade . . . . .5-16
Configuring Your Computer with Windows NT 4.0 . . . .5-18
Step 1. Configure TCP/IP Settings . . . . . . . . . . . . . . .5-18
Step 2. Disable HTTP Proxy . . . . . . . . . . . . . . . . . . . .5-21
Step 3. Obtain IP Settings From Your Barricade . . . . .5-23
Configuring Your Macintosh Computer . . . . . . . . . . . . . .5-24
Step 1. Configure TCP/IP Settings . . . . . . . . . . . . . . .5-24
Step 2. Disable HTTP Proxy . . . . . . . . . . . . . . . . . . . .5-26
Step 3. Obtain IP Settings From Your Barricade . . . . .5-28
Dynamic IP Allocation via a DHCP Server . . . . . . . . . . . .5-30
Manual IP Configuration . . . . . . . . . . . . . . . . . . . . . . . . . .5-31
Verifying Your TCP/IP Connection . . . . . . . . . . . . . . . . .5-32

T ABLE OF C ONTENTS
xiii
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
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™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 on the Internet
at the lowest possible cost, this Broadband Router provides a
convenient and powerful solution.
About the Barricade
The Barricade provides Internet access to multiple users by sharing
a single-user account. The most outstanding feature of the
Barricade is the
dual-port WAN interface which allows you to
connect to an xDSL or Cable
modem, ISDN TA or PSTN analog
modem. The
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 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 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 10/100 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
• 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
• Supports PPP dial-out connection
• 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 Barricade, such as:
• LAN Access
The Barricade provides connectivity to 10/100 Mbps devices,
making it easy to create a network in small offices or homes.
• 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
Barricade includes a built-in client for this protocol,
eliminating the need to install this service on your computer.
• Shared IP Address
The 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.
•VirtualServer
If you have a fixed IP address, you can set up the 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 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.

A PPLICATIONS
1-4
• User-Definable Application Sensing Tunnel
You can define special applications that require multiple
connections such as Internet gaming, videoconferencing, and
Internet telephony. The 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 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
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.
• Virtual Private Network
The 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 Barricade are briefly
described below.

I NTRODUCTION
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• 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
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