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Firewall

When hackers attempt to enter your network, we can alert you by email

Your E-mail
Address

Enter your email address.

SMTP Server
Address

Enter your SMTP server address (usually the part
of the email address following the “@” sign).

POP3 Server
Address

Enter your POP3 server address (usually the part
of the email address following the “@” sign).

User Name

Enter your email account user name.

Password

Enter your email account password.

Connection Policy

Fragmentation
half-open wait

10 secs

Configures the number of seconds that a packet
state structure remains active. When the timeout
value expires, the router drops the unassembled
packet, freeing that structure for use by another
packet.

TCP SYN wait

30 secs

Defines how long the software will wait for a TCP
session to reach an established state before
dropping the session.

TCP FIN wait

5 secs

Specifies how long a TCP session will be
managed after the firewall detects a
FIN-exchange.

TCP connection
idle timeout

3600 secs
(1 hour)

The length of time for which a TCP session will be
managed if there is no activity.

UDP session idle
timeout

30 secs

The length of time for which a UDP session will
be managed if there is no activity.

DoS Detect Criteria

Total incomplete
TCP/UDP sessions
HIGH

300
sessions

Defines the rate of new unestablished sessions
that will cause the software to

start

deleting

half-open sessions.

Total incomplete
TCP/UDP sessions
LOW

250
sessions

Defines the rate of new unestablished sessions
that will cause the software to

stop

deleting

half-open sessions.

Incomplete
TCP/UDP sessions
(per min.) HIGH

250
sessions

Maximum number of allowed incomplete
TCP/UDP sessions per minute.

Incomplete
TCP/UDP sessions
(per min.) LOW

200
sessions

Minimum number of allowed incomplete
TCP/UDP sessions per minute.

Parameter

Defaults

Description

Содержание WL-550

Страница 1: ...http www 3Com com Part No 10016641 Rev AA Published March 2008 Wireless 11g Cable DSL Router User Guide WL 550 3CRWER101U 75 3CRWER101E 75 3CRWER101A 75...

Страница 2: ...mentation contained in or delivered to you in conjunction with this User Guide Unless otherwise indicated 3Com registered trademarks are registered in the United States and may or may not be registere...

Страница 3: ...Minimum System and Component Requirements 12 Physical Features 12 2 INSTALLING THE ROUTER Introduction 17 Positioning the Router 17 Powering Up the Router 18 Connecting the Router to the Internet 18 C...

Страница 4: ...n Settings 32 5 CONFIGURING THE ROUTER Navigating Through the Router Configuration screens 39 Main Menu 39 Network Settings 39 Status 39 LAN Settings 41 WAN Settings 43 Wireless 48 Firewall 57 Schedul...

Страница 5: ...Internet 90 Forgotten Password and Reset to Factory Defaults 90 Wireless Networking 91 Recovering from Corrupted Software 93 Frequently Asked Questions 94 A IP ADDRESSING The Internet Protocol Suite...

Страница 6: ...ECHNICAL SPECIFICATIONS Wireless 11g Cable DSL Router 99 Standards 100 System Requirements 100 C END USER SOFTWARE LICENSE AGREEMENT D OBTAINING SUPPORT FOR YOUR PRODUCT GLOSSARY REGULATORY NOTICES IN...

Страница 7: ...is shipped with the 3Com Wireless 11g Cable DSL Router and contains information that differs from the information in this guide follow the information in the release note Most user guides and release...

Страница 8: ...jury Table 2 Text Conventions Convention Description The words enter and type When you see the word enter in this guide you must type something and then press Return or Enter Do not press Return or En...

Страница 9: ...Document title Document part number on the title page Page number if appropriate Example 3Com Wireless 11g Cable DSL Router User Guide Part Number 149100059700J Rev AA Page 24 Do not use this e mail a...

Страница 10: ...8 ABOUT THIS GUIDE...

Страница 11: ...ide a cost effective means of sharing a single broadband Internet connection amongst several wired and wireless computers The Router also provides protection in the form of an electronic firewall prev...

Страница 12: ...hen you use the Router in your network Figure 2 it becomes your connection to the Internet Connections can be made directly to the Router or to an OfficeConnect Switch expanding the number of computer...

Страница 13: ...ion of all network address settings DHCP Acts as a Virtual server to enable remote access to Web FTP and other services on your network Security Firewall protection against Internet hacker attacks and...

Страница 14: ...10 100 Mbps NIC for each computer to be connected to the four port switch on your Router OR An 802 11b or 802 11g wireless NIC Internet access from your local telephone company or Internet Service Pro...

Страница 15: ...LED is flashing the link is OK and data is being transmitted or received If the LED is off the WAN has been disabled in the Router or there is a problem Refer to Chapter 6 Troubleshooting 4 LAN Status...

Страница 16: ...ture which means either straight through or a crossover cable can be used 7 Power Adapter Socket Only use the power adapter that is supplied with this Router Do not use any other adapter 8 Wireless An...

Страница 17: ...All of your settings will remain upon restarting Push for 8 seconds to reset the Router to the factory default settings To perform a system reset without losing configuration settings click the Resta...

Страница 18: ...16 CHAPTER 1 INTRODUCING THE ROUTER...

Страница 19: ...at will connect to the Router A suitable location might be on top of a high shelf or similar furniture to optimize wireless connections to computers in both horizontal and vertical directions allowing...

Страница 20: ...the Router 2 Plug the power adapter into a standard electrical wall socket Connecting the Router to the Internet Prepare an Ethernet cable for connecting the WAN port of the Wireless 11g Router to the...

Страница 21: ...See Figure 7 Figure 7 Connecting the LAN You have now completed the hardware installation of your Router Next you need to set up your computers so that they can make use of the Router to communicate...

Страница 22: ...th a wireless adapter can communicate with each other as an independent wireless LAN by configuring each computer to the same radio channel However the Router can provide access to your wired wireless...

Страница 23: ...Setting up your computers for networking with the Router 21 Figure 8 WLAN Connections...

Страница 24: ...22 CHAPTER 2 INSTALLING THE ROUTER...

Страница 25: ...sed computer use the following procedure to change your TCP IP settings 1 From the Windows Start Menu select Settings Control Panel 2 Double click on Network and Dial Up Connections 3 Double click on...

Страница 26: ...ion Status will appear 5 A screen similar to Figure 9 should be displayed Select Internet Protocol TCP IP and click on Properties Figure 9 Local Area Connection Properties Screen 6 Ensure that the opt...

Страница 27: ...From the Windows Start Menu select Settings Network 2 Click on Organize Select Properties 3 Click on Manage network Connections 4 Double click Local Area Connection Select Properties and click continu...

Страница 28: ...ea Connection Properties Screen 6 Ensure that the options Obtain an IPv6 v4 address automatically and Obtain DNS servers address automatically are both selected as shown in Figure 12 Click OK Figure 1...

Страница 29: ...g procedure to change your TCP IP settings 1 From the desktop select Apple Menu Control Panels and TCP IP 2 In the TCP IP control panel set Connect Via to Ethernet 3 In the TCP IP control panel set Co...

Страница 30: ...ab A screen similar to Figure 13 should be displayed 4 Select the Never dial a connection option Figure 13 Internet Properties Screen You may want to remove the PPPoE client software from your compute...

Страница 31: ...or higher or Mozilla 1 2 1 or higher To use the Setup Wizard 1 Ensure that you have at least one computer connected to the Router Refer to Chapter 2 for details on how to do this 2 Launch your Web br...

Страница 32: ...ld and click Log in Figure 15 Figure 15 Router Login Screen 5 When you have logged in if you are logging in for the first time the Country Selection screen will appear Figure 16 Please select the coun...

Страница 33: ...d to the following screen and configure your Wireless Settings Setup Wizard Wireless Settings The Wireless Settings screen allows you to set up your wireless network settings You must specify a common...

Страница 34: ...es 11g only 11b only and 11b g mixed mode Default 11b g mixed mode Wi Fi Channel Number The radio channel used by the Router and its clients to communicate with each other This channel must be the sam...

Страница 35: ...P Point to Point Tunneling Protocol providing virtual private networks see page 36 Static IP Address manually assigning IP addresses for clients see page 37 BigPond Australia s largest ISP providing I...

Страница 36: ...u to input a Host Name type it in the Host Name field The MAC Address field will be filled automatically Check all of your settings Click NEXT to proceed or BACK to change your settings PPPoE Mode To...

Страница 37: ...sword in the Password field 3 Re type your password in the Please retype your password field 4 If your ISP has provided you with a Service Name enter it in the Service Name field otherwise leave it bl...

Страница 38: ...EXT to proceed or BACK to change your settings PPTP Mode To set up the Router for use with a PPTP connection use the following procedure Figure 22 PPTP Mode Screen 1 Enter the IP Address information r...

Страница 39: ...f your Service Provider has assigned a fixed IP address enter the assigned IP address information on the screen Figure 23 Static IP Address Screen To assign a fixed IP address 1 Enter your Internet IP...

Страница 40: ...Enter your password in the Password field 3 Re type your password in the Please retype your password field 4 Enter the Service Name provided by your ISP in the Authentication Service Name field 5 Che...

Страница 41: ...to login to the management interface The default password is admin Main Menu Clicking the Home button at any time returns you to this home page The Home screen shows the current software information...

Страница 42: ...the current time INTERNET Displays WAN connection type and status Release Click on this button to disconnect from the WAN Renew Click on this button to establish a connection to the WAN Network LAN Di...

Страница 43: ...r is equipped with a DHCP server that will automatically assign IP addresses to each computer on your network The factory default settings for the DHCP server will work with most applications If you n...

Страница 44: ...1 2 If you want to use the Router as a DHCP Server select Enabled in the DHCP Server field 3 Enter the IP address range of Start IP and End IP in the IP Address Pool fields 4 Specify the Local Domain...

Страница 45: ...et the detailed settings There are five options available for the DSL connection mode Dynamic IP Mode for multiple PCs see page 43 PPPoE PPP over Ethernet providing routing for multiple PCs see page 4...

Страница 46: ...lick SAVE SETTINGS PPPoE PPP over Ethernet provides routing for multiple PCs To configure this function correctly you should obtain the information from your ISP Figure 28 PPPoE Settings Screen 1 Ente...

Страница 47: ...Click SAVE SETTINGS PPTP PPTP is a popular choice among European DSL providers To configure this function correctly you should obtain the information from your ISP Figure 29 PPTP Settings Screen 1 Ent...

Страница 48: ...s you try to access the Internet again or to keep the session alive 5 Click SAVE SETTINGS Static IP For Multiple PCs To configure the Static IP Address mode correctly you should obtain the information...

Страница 49: ...service provider in Australia that uses a heartbeat system to maintain the Internet connection Figure 31 BigPond Mode Screen 1 Configure the built in client with your user name password and service n...

Страница 50: ...for your LAN When disabled no wireless PCs can gain access to either the Internet or other PCs on your wired or wireless LAN through this Router Figure 32 Wireless Settings Screen To use the wireless...

Страница 51: ...hould give your wireless network a unique name 2 Enable or disable Broadcast Wireless Network Name A feature of many wireless network adapters is that a computer s SSID can be set to ANY which means i...

Страница 52: ...outer 6 Click SAVE SETTINGS Wireless Security This feature prevents any non authorized party from reading or changing your data over the wireless network Figure 34 Wireless Security Screen Select the...

Страница 53: ...hanism to transmit your data securely over the wireless network Matching encryption keys must be setup on your Router and wireless client devices to use WEP Figure 35 WEP Only Screen To enable 64 bit...

Страница 54: ...key manually enter your WEP key as 13 pairs of hex digits 0 9 A F Or you can generate the 128 bit WEP key automatically enter a memorable passphrase in the Passphrase box to generate a hex key automat...

Страница 55: ...PA2 Only 3 Select 802 1X or Pre shared Key for the authentication method 802 1X for the enterprise network with a RADIUS server Pre shared key for the SOHO network environment without an authenticatio...

Страница 56: ...MAC address field if you click Allow this means only the MAC addresses registered here in the list will be allowed to access the Router via wireless link if you click Deny this means the registered MA...

Страница 57: ...time in seconds that a session will sit inactive before terminating Set to 0 if you do not want the session to timeout Default 300 seconds Re Authentication Period The interval time in seconds after w...

Страница 58: ...nes the request identifier of the Network Access Server The use of IEEE 802 1X offers an effective framework for authenticating and controlling user traffic to a protected network as well as dynamical...

Страница 59: ...ult Disable WDS implementation varies from vendor to vendor Hence there s no assured WDS interoperability with between all devices in the market Firewall From these screens you can configure settings...

Страница 60: ...Enable the firewall feature and click SAVE SETTINGS to proceed Schedule Rule The Router can be configured to restrict access to the Internet email or other network services at specific days and times...

Страница 61: ...hedule Rule Screen 1 Click Add Schedule Rule to add a schedule rule a screen similar to Figure 42 will appear Figure 42 Add Schedule Rule Screen 2 Enter a name and comment for the schedule rule in the...

Страница 62: ...rvices at specific days and times Restriction can be set for a single computer a range of computers or multiple computers You can define the traffic type permitted or not permitted to the Internet Fig...

Страница 63: ...ange into the Client PC IP Address fields 4 Select the services to be blocked A list of popular services is given on this screen to block a particular service check the appropriate Blocking checkbox I...

Страница 64: ...reen see page 58 6 Click OK to add the settings MAC Filter Use the MAC Filtering to block access to your network using MAC addresses Figure 45 MAC Filter Screen The Router can also limit the access of...

Страница 65: ...ring xxx Figure 46 URL Filtering Screen Enter the URL address or keywords in the URL Keyword field You can define up to 30 sites or keywords here To complete this configuration you will need to create...

Страница 66: ...cts packets at the application layer maintains TCP and UDP session information including timeouts and number of active sessions and provides the ability to detect and prevent certain types of network...

Страница 67: ...sers no longer have access to network resources The Router protects against DoS attacks including Ping of Death Ping flood attack SYN flood attack IP fragment attack Teardrop Attack Brute force attack...

Страница 68: ...sh to use Stateful Packet Inspection SPI for blocking packets click on the Yes radio button in the Enable SPI and Anti DoS firewall protection field and then check the inspection type that you need su...

Страница 69: ...ore dropping the session TCP FIN wait 5 secs Specifies how long a TCP session will be managed after the firewall detects a FIN exchange TCP connection idle timeout 3600 secs 1 hour The length of time...

Страница 70: ...ecs Length of time before an incomplete TCP UDP session is detected as incomplete Maximum half open fragmentation packet number from same host 30 sessions Maximum number of half open fragmentation pac...

Страница 71: ...Internet access This may be necessary if the NAT feature is causing problems with an application such as a game or video conferencing application Figure 48 DMZ Screen Enter the IP address of a DMZ Dem...

Страница 72: ...ost or changed It is recommended that you backup your current configuration before performing a firmware update Restore from saved Configuration file backup bin The restore option will allow you to re...

Страница 73: ...ter s firmware Firmware updates contain improvements and fixes to problems that may have existed Figure 50 Firmware Upgrade Screen Please download the firmware file to your PC first and then click Bro...

Страница 74: ...figure NAT Shares a single ISP account with multiple users sets up virtual servers System Sets the local time zone the password for administrator access the IP address of a PC that will be allowed to...

Страница 75: ...ws all of the computers on your home network to use one IP address Using the NAT capability of the Router you can access the Internet from any computer on your home network without having to purchase...

Страница 76: ...mapped to a pool of local addresses Virtual Servers The Virtual servers feature allows you to route external Internet calls for services such as a web server port 80 FTP server Port 21 or other applic...

Страница 77: ...the table To manually configure your virtual servers 1 Enter the IP address and the description in the spaces provided for the internal machine 2 Select the protocol type TCP UDP or both TCP and UDP...

Страница 78: ...uter in the DMZ 1 Click the List of well known special applications link for more information 2 Specify the public port number normally associated with an application in the Trigger Port field Set the...

Страница 79: ...to move forwards and backwards As the NAT mapping is dynamic a Refresh button is provided to refresh the NAT Mapping Table with the most updated values The content of the NAT Mapping Table is describe...

Страница 80: ...s section includes all the basic configuration tools for the Router such as time settings password settings remote management and Syslog server setup Time Zone You can set the time settings for the Ro...

Страница 81: ...gs The system clock may not update immediately Allow at least 15 minutes for the Router to contact the time servers on the Internet and get a response You cannot set the clock yourself You can specify...

Страница 82: ...n to the web management system again Setting the idle time to 0 will mean the connection never times out Default 10 minutes Remote Management By default management access is only available to users on...

Страница 83: ...ct Enable administration from any Internet Host this allows any computer to access the Router remotely Before you enable this function ensure that you have set the Administration Password Click SAVE S...

Страница 84: ...ppliances and wireless devices UPnP architecture leverages TCP IP and the web to enable seamless proximity networking in addition to control and data transfer among networked devices in the home offic...

Страница 85: ...mple com might translate to 198 105 232 4 Check with your ISP for information on this screen Figure 62 DNS Screen If your ISP provided you with specific DNS addresses to use enter them into the approp...

Страница 86: ...IP address The Router supports two DDNS providers DynDNS org TZO com Before you set up DDNS you must obtain an account password or key and static domain name from your DDNS provider DDNS is disabled b...

Страница 87: ...gure 64 Static Routes Screen This screen shows a list of current static route entries For each entry the following information is displayed Index the index of the entry Network Address the network add...

Страница 88: ...n sends simplified routing data to other RIP enabled devices rather than full routing data 3 Select the Operation Mode Disabled RIP is not enabled for the WAN or LAN interface Enabled RIP is enabled f...

Страница 89: ...None Switches off authentication on the specified interface Password An unencrypted text password that needs to be set on all RIP enabled devices connected to this Router RIP information is not share...

Страница 90: ...88 CHAPTER 5 CONFIGURING THE ROUTER...

Страница 91: ...er configuration screens check the following Confirm that the physical connection between your computer and the Router is OK and that the LAN Status LEDs on the Router and network adapter are illumina...

Страница 92: ...nated Ensure that you have entered the correct information into the Router configuration screens as required by your Internet Service Provider Use the Internet Settings screen to verify this Check tha...

Страница 93: ...er If you have a wired and a wireless NIC in the same computer ensure that the wired NIC is disabled Check the status of the WLAN LED it should be lit if wireless is enabled and will flash when there...

Страница 94: ...n try initiating a search manually if the client software supports this feature or manually set the channel on your wireless computer to correspond to the Router channel number Please refer to your wi...

Страница 95: ...ed to reconfigure this computer to obtain an IP address automatically see Obtaining an IP Address Automatically on page 23 3 Restart the computer and re apply power to the Router 4 Using the Web brows...

Страница 96: ...nly 4 LAN ports on the Router How are additional computers connected You can expand the number of connections available on your LAN by using hubs switches and wireless access points connected to the R...

Страница 97: ...ice over the network the Router must be correctly configured with the following IP information An IP address A Subnet Mask IP Addresses and Subnet Masks Each device on your network must have a unique...

Страница 98: ...e 192 168 100 identifies the network on which the device resides Part two 8 identifies the device within the network This type of IP address operates on a subnet mask of 255 255 255 0 See Table 4 for...

Страница 99: ...ated once you disconnect from the network DHCP will work on any client Operating System such as Windows 95 Windows 98 Windows NT 4 0 Windows 2000 and Windows XP Also using DHCP means that the same IP...

Страница 100: ...subnet mask of 255 255 0 0 If two devices allocate themselves the same address the conflict is detected and one of the devices allocates itself a new address Automatic IP addressing support was intro...

Страница 101: ...to 48 36 24 18 12 or 6 Mbps Maximum channels 13 Range up to 304 8m 1000ft Sensitivity 6 12 18 24 36 48 Mbps 85 dBm 54 Mbps 66 dBm typical Modulation CCK BPSK QPSK OFDM Encryption 40 64 bit WEP 128 bit...

Страница 102: ...ight 30 mm 1 1 in Weight Approximately 550 g 1 1 lbs Standards Functional ISO 8802 3 IEEE 802 3 IEEE 802 11b 802 11g Environmental EN 60068 IEC 68 See Regulatory Notices for conditions of operation Sy...

Страница 103: ...IEEE 802 3i u and x specifications Cable Specifications The Router supports the following cable types and maximum lengths Category 3 Ethernet or Category 5 Fast Ethernet or Dual Speed Ethernet Twiste...

Страница 104: ...102 APPENDIX B TECHNICAL SPECIFICATIONS...

Страница 105: ...TALL OR OTHERWISE USE THE SOFTWARE OR DOCUMENTATION DO NOT CLICK ON THE I AGREE OR SIMILAR BUTTON AND IF YOU HAVE RECEIVED THIS SOFTWARE AND DOCUMENTATION ON PHYSICAL MEDIA PROMPTLY RETURN THE ENTIRE...

Страница 106: ...each such workstation or network server on which the Software is used as permitted hereunder Otherwise the Software and Documentation may be copied only as essential for backup or archive purposes in...

Страница 107: ...supplier of computer programs included in the Software is a third party beneficiary of the provisions of this Section 1 and such third party may protect its rights in the Software against violations...

Страница 108: ...ter Software Documentation as such terms are used in 48 C F R 12 212 or 48 C F R 227 7202 as applicable Consistent with 48 C F R 12 212 or 48 C F R 227 7202 1 through 227 7202 4 as applicable the Comm...

Страница 109: ...laws of the Commonwealth of Massachusetts U S A excluding its conflicts of laws principles and excluding the United Nations Convention on Contracts for the International Sale of Goods SEVERABILITY In...

Страница 111: ...D OBTAINING SUPPORT FOR YOUR PRODUCT For technical support register your product and request service via our online support system at http www 3Com com esupport...

Страница 112: ...110 APPENDIX D OBTAINING SUPPORT FOR YOUR PRODUCT...

Страница 113: ...Point An access point is a device through which wireless clients connect to other wireless clients and which acts as a bridge between wireless clients and a wired network such as Ethernet Wireless cl...

Страница 114: ...f Twisted Pair TP cabling defined by the EIA TIA 586 standard Category 5 can be used in Ethernet 10BASE T and Fast Ethernet networks 100BASE TX and can transmit data up to speeds of 100 Mbps Category...

Страница 115: ...levels of encryption 40 64 bit and 128 bit 128 bit is a more powerful level of encryption than 40 64 bit ESSID Extended Service Set Identifier The ESSID is a unique identifier for your wireless netwo...

Страница 116: ...your Router see also Ad Hoc mode IP Internet Protocol IP is a Layer 3 network protocol that is the standard for sending data through a network IP is part of the TCP IP set of protocols that describe t...

Страница 117: ...ress The NAT capability of the Router allows you to access the Internet from any computer on your home network without having to purchase more IP addresses from your ISP Network A network is a collect...

Страница 118: ...used to create IP address numbers used only within a particular network as opposed to valid IP address numbers recognized by the Internet which must assigned by InterNIC Subnets A network that is a c...

Страница 119: ...to extend range and reach though this can affect the overall throughput of data WECA Wireless Ethernet Compatibility Alliance An industry group formed to certify cross vendor interoperability and comp...

Страница 120: ...LAN is a group of computers and devices connected together by wireless in a relatively small area such as a house or office WPA Wi Fi Protected Access A dynamically changing encryption mechanism for w...

Страница 121: ...mentation that comes with the product This product contains encryption It is unlawful to export out of the U S without obtaining a U S Export License This product does not contain any user serviceable...

Страница 122: ...120...

Страница 123: ...r DDNS Screen 80 Dynamic IP Mode Screen 30 33 39 42 43 E Encryption Screen 46 Encryption disabling 47 F Firewall Screen 54 Forgotten Password 86 I Internet addresses 91 Internet Properties Screen 24 I...

Страница 124: ...oute Parameters Screen 81 Subnet Mask 91 T TCP IP 21 23 91 Technical specifications 95 standards 95 Time and Time Zone screen 74 75 U URL Blocking Screen 59 60 61 V Virtual Servers Screen 71 W WDS 53...

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