Pentagram Cerberus P6371 User manual

Installation and Operation Manual
PENTAGRAM Cerberus P6371
The latest versions of manual, drivers and applications are available on
www.pentagram.eu
2008-10-07

NOTE! Any information and technical data are subject to change without prior notification
and/or indication in this manual.
© 2008 PENTAGRAM
All rights reserved; copying and reproduction is strictly forbidden.

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INDEX
INTRODUCTION........................................................................................................................ 5
FEATURES ...................................................................................................................................5
PACKAGE CONTENTS ................................................................................................................6
PRODUCT OVERVIEW ............................................................................................................. 6
IMPORTANT NOTES ....................................................................................................................6
FRONT PANEL .............................................................................................................................6
BACK PANEL ...............................................................................................................................7
DEFAULT SETTINGS ...................................................................................................................7
RESETTING ROUTER ..................................................................................................................7
CONNECTING CERBERUS TO COMPUTER. .............................................................................8
CONFIGURE TCP/IP.....................................................................................................................8
CONFIGURE ROUTER VIA WEB BROWSER ....................................................................... 13
LOGIN .........................................................................................................................................13
NAVIGATION ..............................................................................................................................14
STATUS TAB ..............................................................................................................................15
BASIC SETTINGS / QUICK SETUP ...........................................................................................16
NETWORK / LAN........................................................................................................................17
NETWORK / WAN.......................................................................................................................18
NETWORK / MAC CLONE..........................................................................................................27
DHCP / DHCP SETTINGS ..........................................................................................................28
DHCP / DHCP CLIENTS LIST .................................................................................................... 29
DHCP / ADDRESS RESERVATION ...........................................................................................29
FORWARDING / VIRTUAL SERVERS .......................................................................................30
FORWARDING / PORT TRIGGERING .......................................................................................31
FORWARDING / DMZ.................................................................................................................33
FORWARDING / UPNP...............................................................................................................33
SECURITY / FIREWALL .............................................................................................................34
SECURITY / IP ADDRESS FILTERING ......................................................................................35
SECURITY / DOMAIN FILTERING .............................................................................................37
SECURITY / MAC ADDRESS FILTERING .................................................................................38
SECURITY / REMOTE MANAGEMENT .....................................................................................39
SECURITY / ADVANCED SECURITY ........................................................................................40
STATIC ROUTING ......................................................................................................................41
IP & MAC BINDING / BINDING SETTINGS................................................................................42
IP & MAC BINDING / ARP LIST .................................................................................................43
DYNAMIC DNS ...........................................................................................................................43
SYSTEM TOOLS / TIME SETTINGS ..........................................................................................44
SYSTEM TOOLS / FIRMWARE UPGRADE ...............................................................................45
SYSTEM TOOLS / FACTORY DEFAULTS ................................................................................ 45
SYSTEM TOOLS / BACKUP AND RESTORE ........................................................................... 45
SYSTEM TOOLS / REBOOT ......................................................................................................46
SYSTEM TOOLS / LOG..............................................................................................................47
SYSTEM TOOLS / STATISTICS.................................................................................................47
TROUBLESHOOTING............................................................................................................. 49
USING LEDS TO DIAGNOSE PROBLEMS................................................................................49
PROBLEMS WITH RESOLVING IP ADDRESS FROM THE ROUTER’S DHCP SERVER IN
WINDOWS VISTA .......................................................................................................................49
PROBLEMS WITH THE WEB INTERFACE ...............................................................................50
PROBLEMS WITH THE LOGIN USERNAME AND PASSWORD..............................................50
PROBLEMS WITH LAN INTERFACE ........................................................................................50
PROBLEMS WITH THE INTERNET ACCESS ...........................................................................50
INTERNET CONNECTION DISCONNECTS:..............................................................................50

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Introduction
The Cerberus P 6371 Router integrates 4-port Switch, firewall and NAT-router. Its design is
dedicated to Small Office/Home Office (SOHO) network solutions. The Cerberus P 6371
Router will allow you to connect your network better than ever, sharing Internet Access, files
and fun, easily and securely.
Features
•Complies with IEEE 802.3, IEEE 802.3u standards.
•One 10/100M Auto-Negotiation RJ45 WAN port, 4 10/100M Auto-Negotiation RJ45 LAN
ports, supporting Auto MDI/MDIX.
•Shares data and Internet access for users, supporting PPPoE, Dynamic IP, Static IP,
L2TP, PPTP, BigPond Cable Internet access.
•Supports Virtual Server, Special Application and DMZ host.
•Supports UPnP, Dynamic DNS, Static Routing, VPN Pass-through.
•Connecting Internet on demand and disconnecting from the Internet when idle for
PPPoE.
•Built-in NAT and DHCP server supporting static IP address distributing.
•Built-in firewall supporting IP address filtering, Domain Name filtering, and MAC address
filtering.
•Supports connecting/disconnecting from the Internet on a specified time of day.
•Supports access control, parents and network administrators can establish restricted
access policies based on time of day for children or staff.
•Supports Flow Statistics.
•Supports ICMP-FLOOD, UDP-FLOOD, TCP-SYN-FLOOD filter.
•Ignores Ping packets from WAN or LAN ports.
•Supports firmware upgrade.

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Package Contents
1. PENTAGRAM Cerberus P 6371 router
2. Power adapter 9 V, 0,8 A
3. Ethernet cable (RJ-45)
4. CD
5. Quick Installation Guide
Product Overview
Important Notes
•Do not use the router in high humidity or high temperatures.
•Do not use the same power source for the router as other equipment.
•Do not open or repair the case yourself. If the router is too hot, turn off the
power immediately and have it repaired at a qualified service center.
•Avoid using this product and all accessories outdoors.
•Place the router on a stable surface.
•Only use the power adapter that comes with the package. Using a
different voltage rating power adaptor may damage the router.
Front Panel
LED Action Description
Not lit No PowerPWR Lit up Power on
Lit up The router is initializing
Flashing The router is working properly
SYS
Not lit The router has a hardware error
Not lit There is no device linked to the corresponding port
Lit up There is a device linked to the corresponding port but no activity
WAN / 1-4
Flashing There is an active device linked to the corresponding port

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Back Panel
Label Used for...
POWER Connecting with supplied power adapter
LAN 1-4 (RJ-45) Connecting with computers/devices through Ethernet cable
WAN (RJ-45) Connecting with DSL/cable modem through Ethernet cable
RESET Resetting the device.
Default Settings
Before changing configuration familiarize yourself with these default settings.
IP Address 192.168.1.100
Subnet Mask 255. 255. 255.0
DHCP Server Enabled
DHCP Server IP Address Pool 100 IP addresses
from 192.168.1.101
IP Address Lease Time 7200 seconds (2 hours)
User Name admin
Password pentagram
It is recommended to change User Name and Password as soon as possible.
If you ever forget the password to log in, you may need to restore the factory default settings.
This procedure is described on the next page.
Resetting router
•Use the Factory Defaults function on System Tools -> Factory Defaults page in the
router's Web-based Utility, or
•Use the RESET button: First, turn off the router's power. Second, press and hold the
default reset button then turn on the router's power, until the SYS LED lights up (about 3
seconds). Last, release the reset button and wait for the router to reboot.

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Connecting Cerberus to Computer.
Connecting via Ethernet Port (Ethernet Card)
All Ethernet ports of router are made in the technology, which automatically activates
Crossover if necessary. Thanks to autonegotiation of connection speed the router will
automatically select the maximum available speed rate. Transfer at 10/100 Mbit/s rate
requires the category 5 cable wired with RJ-45 connectors. In case of "straight" cable both
connectors must be crimped in standard EIA/TIA 568B. In case of Crossover cable one
connector must be in standard EIA/TIA 56A, and the second in EIA/TIA 568B. After connecting
the device to one of the ports, corresponding LED will begin to blink. That signals the process
of the auto-checking of port and the negotiation of connection speed rate.
Configure TCP/IP
After connecting the computer to the router the TCP/IP protocol should be configured. The
protocol should be automatically installed together with Network card drivers. It is advised that
TCP/IP should be configured to receive IP address and all the necessary network parameters
from DHCP server automatically. You can find step-by-step configuration for different
Windows systems below.

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Windows Vista
Note: Network configuration require administrator privileges. When User Account Control
window pops up, either click Continue (Administrator user) or select Administrator user and
enter valid password (Standard user).
1. Click Start →Control Panel.
2. Click View network status and tasks.
3. Click View status for appropriate
connection.
4. On General tab, Click the Properties
button.
5. On General tab, select Internet Protocol
Version 4 (TCP/IPv4) and click
Properties.

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6. On General tab, select Obtain an IP
address automatically and Obtain DNS
server address automatically.
7. Click OK to save settings and close
Internet Protocol Version 4 (TCP/IPv4)
Properties window.
Note: In some cases Windows Vista cannot obtain an IP address from certain router’s DHCP
server. If you encounter this, follow this steps to resolve this problem (Microsoft Support page)
http://support.microsoft.com/kb/928233/en-us