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3Com OfficeConnect 3CRWDR101A-75 User Manual

Other manuals for OfficeConnect 3CRWDR101A-75: Installation Manual
Manual is about: OfficeConnect ADSL Wireless 54 Mbps 11g Firewall Router

Summary of OfficeConnect 3CRWDR101A-75

  • Page 1

    Http://www.3com.Com/ part no. 10015091 rev. Aa published march 2006 officeconnect adsl wireless 54 mbps 11g firewall router user guide wl-552 ® 3crwdr101a-75 3crwdr101b-75.

  • Page 2

    3com corporation 350 campus drive, marlborough, ma usa 01752-3064 copyright © 2004, 2005, 2006, 3com corporation. All rights reserved. No part of this documentation may be reproduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) ...

  • Page 3: Ontents

    C ontents a bout t his g uide naming convention 7 conventions 8 feedback about this user guide 8 related documentation 9 1 i ntroducing the r outer officeconnect adsl wireless 54 mbps 11g firewall router 11 router advantages 13 package contents 13 minimum system and component requirements 14 physica...

  • Page 4

    4 r unning the s etup w izard accessing the setup wizard 27 setup wizard - change password 30 setup wizard - time and time zone 30 setup wizard - connection type 31 setup wizard - lan settings 36 setup wizard - wireless settings 37 setup wizard - configuration summary 38 5 c onfiguring the r outer n...

  • Page 5

    Schedule rule 74 pc privileges 75 url filter 77 server control 79 quality of service 81 qos settings 81 traffic mapping 81 traffic statistics 82 advanced 83 security 83 static routes 86 rip 87 ddns 88 snmp 90 syslog 91 proxy arp 92 system tools 93 restart router 93 configuration 93 upgrade 94 time z...

  • Page 6: Ip A

    Connecting to the internet 104 forgotten password and reset to factory defaults 104 wireless networking 105 recovering from corrupted software 107 frequently asked questions 108 a ip a ddressing the internet protocol suite 109 managing the router over the network 109 ip addresses and subnet masks 10...

  • Page 7

    G lossary r egulatory n otices i ndex.

  • Page 9: Bout

    A bout t his g uide this guide describes how to install and configure the 3com officeconnect © adsl wireless 54 mbps 11g firewall router (3crwdr101a-75/3crwdr101b-75). This guide is intended for use by those responsible for installing and setting up network equipment; consequently, it assumes a basi...

  • Page 10

    8 a bout t his g uide conventions table 1 and table 2 list conventions that are used throughout this guide. Table 1 notice icons icon notice type description information note information that describes important features or instructions. Caution information that alerts you to potential loss of data ...

  • Page 11

    Feedback about this user guide 9 feedback about this user guide your suggestions are very important to us. They will help make our documentation more useful to you. Please e-mail comments about this document to 3com at: pddtechpubs_comments@3com.Com please include the following information when comm...

  • Page 12

    10 a bout t his g uide.

  • Page 13: Ntroducing

    1 i ntroducing the r outer welcome to the world of networking with 3com ® . In the modern business environment, communication and sharing information is crucial. Computer networks have proved to be one of the fastest modes of communication but, until recently, only large businesses could afford the ...

  • Page 14

    12 c hapter 1: i ntroducing the r outer figure 1 example network without a router when 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 or hub, expanding the number of computers ...

  • Page 15

    Router advantages 13 router advantages the advantages of the router include: ■ shared internet connection for both wired and wireless computers ■ high speed 802.11g wireless networking ■ no need for a dedicated, “always on” computer serving as your internet connection ■ cross-platform operation for ...

  • Page 16

    14 c hapter 1: i ntroducing the r outer minimum system and component requirements your router requires that the computer(s) and components in your network be configured with at least the following: ■ a computer with an operating system that supports tcp/ip networking protocols (for example windows 9...

  • Page 17

    Physical features 15 2 power led green indicates that the router is powered on, and the boot up is successful. 3 sync led green if the led is on it indicates that dsl connection is present. This led flashes during configuration at power up. 4 online led green if this led is on, your username/passwor...

  • Page 18

    16 c hapter 1: i ntroducing the r outer the rear panel ( figure 4 ) of the router contains four lan ports, one adsl port, a reset button, a power ok led, and a power adapter socket. Figure 4 router - rear panel 7 wireless antennae the antennae should be placed in a ‘v’ position when initially instal...

  • Page 19: Nstalling

    2 i nstalling the r outer introduction this chapter will guide you through a basic installation of the router, including: ■ connecting the router to the internet. ■ connecting the router to your network. ■ setting up your computers for networking with the router. Safety information please note the f...

  • Page 20

    18 c hapter 2: i nstalling the r outer when positioning your router, ensure: ■ it is out of direct sunlight and away from sources of heat. ■ cabling is away from power lines, fluorescent lighting fixtures, and sources of electrical noise such as radios, transmitters and broadband amplifiers. ■ water...

  • Page 21

    Powering up the router 19 powering up the router to power up the router: 1 plug the power adapter into the power adapter socket located on the back panel of the router. 2 plug the power adapter into a standard electrical wall socket. 3 press the power button located on the back of the router. Connec...

  • Page 22

    20 c hapter 2: i nstalling the r outer you can connect your phones and computer directly to the splitter as shown below ( figure 6 ): or ■ if you are using a splitterless (g.Lite) connection, then your service provider will attach the outside adsl line directly to your phone system. In this case you...

  • Page 23

    Connecting the router 21 figure 7 installing without a splitter 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 with the internet. 3com recommends that you perform the initial router config...

  • Page 24

    22 c hapter 2: i nstalling the r outer.

  • Page 25: Etting

    3 s etting u p y our c omputers the router has the ability to dynamically allocate network addresses to the computers on your network, using dhcp. However, your computers need to be configured correctly for this to take place. To change the configuration of your computers to allow this, follow the i...

  • Page 26

    24 c hapter 3: s etting u p y our c omputers figure 8 local area properties screen 6 ensure that the options obtain an ip address automatically, and obtain dns server address automatically are both selected as shown in figure 9 . Click ok. Figure 9 internet protocol (tcp/ip) properties screen 7 rest...

  • Page 27

    Obtaining an ip address automatically 25 windows xp 1 from the windows start menu, select control panel. 2 click on network and internet connections. 3 click on the network connections icon. 4 double click on lan or high speed connection icon. A screen titled local area connection status will appear...

  • Page 28

    26 c hapter 3: s etting u p y our c omputers disabling pppoe and pptp client software if you have pppoe client software installed on your computer, you will need to disable it. To do this: 1 from the windows start menu, select settings > control panel. 2 double click on internet options. 3 select th...

  • Page 29: Unning

    4 r unning the s etup w izard accessing the setup wizard the router setup program is web-based, which means that it is accessed through your web browser (netscape navigator 4.7 or higher, internet explorer 5.0 or higher, or mozilla 1.2.1 or higher). To use the setup wizard: 1 ensure that you have at...

  • Page 30

    28 c hapter 4: r unning the s etup w izard 4 to log in as an administrator, enter the password (the default password is admin) in the system password field and click log in ( figure 12 ). Figure 12 router login screen 5 when you have logged in, ■ if you are logging in for the first time, the country...

  • Page 31

    Accessing the setup wizard 29 figure 14 welcome screen ■ go to the notice board tab to see the current software information. To view the web help, click the help button. ■ go to the password tab to change the password ( figure 15 ). ■ go to the wizard tab to do a quick setup of the router ( figure 1...

  • Page 32

    30 c hapter 4: r unning the s etup w izard 3 enter the time period in login timeout to set a maximum period of time for which the login session is maintained during inactivity (default: 10 minutes). Setup wizard - change password to ensure the security of your router, it is recommended that you choo...

  • Page 33

    Accessing the setup wizard 31 4 check the enable box in the daylight savings field, if daylight savings applies to your area. 5 click next. Setup wizard - connection type the connection type screen allows you to set up the router for the type of internet connection you have. Before setting up your c...

  • Page 34

    32 c hapter 4: r unning the s etup w izard pppoe mode to set up the router for use with a ppp over ethernet (pppoe) connection, use the following procedure: figure 19 pppoe screen 1 enter your user name in the username field. 2 enter your password in the password field. 3 re-type your password in th...

  • Page 35

    Accessing the setup wizard 33 pppoa mode to set up the router for use with a ppp over atm (pppoa) connection, use the following procedure: figure 20 pppoa screen 1 enter your user name in the username field. 2 enter your password in the password field. 3 re-type your password in the retype password ...

  • Page 36

    34 c hapter 4: r unning the s etup w izard bridge mode (for a single pc) to set up the router for use with an rfc1483 bridged connection, use the following procedure: figure 21 bridged mode screen 1 enter your vpi and vci information in the vpi/vci fields. 2 select the encapsulation type (llc or vc ...

  • Page 37

    Accessing the setup wizard 35 1 enter your internet ip address in the wan ip field. 2 enter the subnet mask in the subnet mask field. 3 enter the default gateway ip address in the default gateway field. 4 enter the dns address in the dns field. 5 enter your vpi and vci information in the vpi/vci fie...

  • Page 38

    36 c hapter 4: r unning the s etup w izard to assign a fixed ip address: 1 enter your internet ip address in the wan ip field. 2 enter the subnet mask in the subnet mask field. 3 enter the default gateway ip address in the default gateway field. 4 enter the dns address in the dns field. 5 enter your...

  • Page 39

    Accessing the setup wizard 37 setup wizard - wireless settings the wireless settings screen allows you to set up the ssid and radio channel used for the wireless connection. Figure 25 wireless settings screen 1 select the channel you want to use from the channel drop-down menu. 2 specify the ssid to...

  • Page 40

    38 c hapter 4: r unning the s etup w izard setup wizard - configuration summary when you have completed the setup wizard, a configuration summary will appear. Verify the configuration information of the router and then click apply to save your settings. 3com recommends that you print out this page f...

  • Page 41: Onfiguring

    5 c onfiguring the r outer navigating through the router configuration screens this chapter describes all the screens available through the router configuration screens, and is provided as a reference. To get to the configuration screens, enter the router’s default ip in the location bar of your bro...

  • Page 42

    40 c hapter 5: c onfiguring the r outer lan settings your router 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 need to make changes to the settings...

  • Page 43

    Lan settings 41 1 enter the router’s ip address and subnet mask in the appropriate fields. The default ip address is 192.168.1.1. 2 if you want to use the router as a dhcp server, select on in the dhcp server field. 3 enter the ip address range in the ip pool start address and ip pool end address fi...

  • Page 44

    42 c hapter 5: c onfiguring the r outer ■ host name — the client machine’s host name, if configured. ■ mac address — the media access control (mac) address of the client’s network card. ■ client type — whether the client is connected to the router by wired or wireless connection. ■ check the fix che...

  • Page 45

    Wireless settings 43 wireless settings the wireless settings screens allow you to configure the settings for the wireless connections. You can enable or disable the wireless connection for your lan. When disabled, no wireless pcs can gain access to either the internet or other pcs on your wired or w...

  • Page 46

    44 c hapter 5: c onfiguring the r outer configuration the wireless configuration screen allows you to turn on/ turn off the wireless function, and set up basic wireless settings. Figure 32 wireless configuration screen to enable the wireless function: 1 check enable wireless networking checkbox. 2 s...

  • Page 47

    Wireless settings 45 encryption this feature prevents any non-authorized party from reading or changing your data over the wireless network. Figure 33 encryption screen select the wireless security mode that you want to use from the drop-down menu, and click apply. There are five selections: ■ disab...

  • Page 48

    46 c hapter 5: c onfiguring the r outer 64-bit wep wep is the basic mechanism 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 34 64-bit wep screen to enable 64-bit wep: 1 you can enter the ...

  • Page 49

    Wireless settings 47 128-bit wep wep is the basic mechanism to transmit your data securely over the wireless network. Matching encryption keys must be set up on your router and wireless client devices to use wep. Figure 35 128-bit wep screen to enable 128-bit wep: 1 you can enter the 128-bit wep key...

  • Page 50

    48 c hapter 5: c onfiguring the r outer wpa-psk (no server) wpa (wi-fi protected access) provides dynamic key changes and constitutes the best security solution. If your network does not have a radius server. Select the no server option. Figure 36 wpa-psk (no server) screen 1 select wpa-psk (no serv...

  • Page 51

    Wireless settings 49 wpa (with radius server) wpa (wi-fi protected access) provides dynamic key changes and constitutes the best security solution. This function requires that a radius server is running on the network. Figure 37 wpa (with radius server) screen 1 select wpa with radius server from th...

  • Page 52

    50 c hapter 5: c onfiguring the r outer connection control this feature is used to filter the clients based on their mac addresses. Check the enable mac address filtering checkbox, the connection control screen will appear. Figure 38 connection control screen there are two options available in the a...

  • Page 53

    Wireless settings 51 client list you can view the list of all wireless clients that are connected to the router. Figure 39 client list screen click refresh to update the list. Wds settings the router supports wds (wireless distribution system). Wds enables one or more access points to rebroadcast re...

  • Page 54

    52 c hapter 5: c onfiguring the r outer 3 click add to add the mac address of the ap to the list, the add wds screen will appear (refer to figure 41 ). Figure 41 add wds screen enter the mac address(es) of one or more access points in the ap mac address table, and click apply. Advance the advance sc...

  • Page 55

    Wireless settings 53 ■ dtim interval: a dtim (delivery traffic indication message) is a countdown mechanism used to inform your wireless clients of the next window for listening to broadcast and multicast messages. ■ fragmentation threshold: this is the maximum size for directed data packets transmi...

  • Page 56

    54 c hapter 5: c onfiguring the r outer internet settings you can configure the settings for your dsl connection. Atm pvc this feature is used to configure the parameters for your dsl connection. The information necessary to complete these screens should be obtained from your isp. Check with your is...

  • Page 57

    Internet settings 55 pppoe ppp over ethernet, provides routing for multiple pcs. To configure this function correctly, you should obtain the information from your isp. Figure 45 pppoe settings screen 1 select pppoe from the protocol drop-down menu. 2 enter the ip address and subnet mask information ...

  • Page 58

    56 c hapter 5: c onfiguring the r outer ■ manual - start in last state means that after re-booting the router, the internet connection will stay in the previous condition before the reboot. 5 if you want your router to automatically disconnect from the internet after a period of inactivity, specify ...

  • Page 59

    Internet settings 57 13 click apply. Pppoa ppp over atm, this is a popular choice among european dsl providers. To configure this function correctly, you should obtain the information from your isp. Figure 46 pppoa settings screen 1 select pppoa from the protocol drop-down menu. 2 ip assigned by isp...

  • Page 60

    58 c hapter 5: c onfiguring the r outer 4 select the connection type from the connect type drop-down menu. ■ always connected means the internet connection to your isp is always on. ■ auto - triggered by traffic means your router will automatically connect to your isp every time a pc needs to access...

  • Page 61

    Internet settings 59 used for connections in which there is no fixed timing relationship between samples, but that still need a guaranteed qos. Compare with abr, cbr, and ubr. ■ ubr (unspecified bit rate): the ubr service class is intended for delay-tolerant or non-real-time applications, for exampl...

  • Page 62

    60 c hapter 5: c onfiguring the r outer 4 select the type of quality of service that you want from the qos class drop-down menu. ■ cbr (constant bit rate): the cbr service class is intended for real-time applications, for example, those requiring tightly constrained delay and delay variation, such a...

  • Page 63

    Internet settings 61 routing mode over atm (rfc 1483 routed mode) this mode is commonly used with either dynamic or static ip addressing. In this mode the wan adsl port will be configured with an ip address provided by the isp. To configure the settings correctly, you should obtain the information o...

  • Page 64

    62 c hapter 5: c onfiguring the r outer 8 select the type of quality of service that you want from the qos class drop-down menu. ■ cbr (constant bit rate): the cbr service class is intended for real-time applications, for example, those requiring tightly constrained delay and delay variation, such a...

  • Page 65

    Internet settings 63 dynamic/fixed ip in 1483 bridge mode (for multiple pcs) in this example, the isp uses fixed/dynamic ip to provide the internet connection. To configure this function correctly, you should obtain the information on this screen from your isp. Figure 49 dynamic/fixed ip for bridge ...

  • Page 66

    64 c hapter 5: c onfiguring the r outer 8 select the type of quality of service that you want from the qos class drop-down menu. ■ cbr (constant bit rate): the cbr service class is intended for real-time applications, for example, those requiring tightly constrained delay and delay variation, such a...

  • Page 67

    Internet settings 65 dns domain name service (or server) is an internet service that translates domain names into ip addresses. Because domain names are alphabetic, they're easier to remember. The internet however, is really based on ip addresses. Every time you use a domain name, a dns service must...

  • Page 68

    66 c hapter 5: c onfiguring the r outer hostname & clone mac address to configure the hostname and clone mac address information for your router, select internet settings, then go to the clone mac address tab. The hostname and mac address screen displays. Figure 52 hostname and mac address screen 1 ...

  • Page 69

    Firewall 67 firewall from these screens, you can configure settings for the firewall. Your router is equipped with a firewall that will protect your network from a wide array of common hacker attacks including ping of death (pod) and denial of service (dos) attacks. You can turn the firewall functio...

  • Page 70

    68 c hapter 5: c onfiguring the r outer for low and medium levels of firewall protection, refer to figure 54 . For high level of firewall protection, refer to figure 55 . Figure 54 low and medium level firewall protection screen when abnormal network activity occurs, an alerting email will be sent o...

  • Page 71

    Firewall 69 figure 55 high level firewall protection screen if you select high level of protection, you will need to configure additional parameters for the firewall. ■ fragmentation half-open wait - configures the number of seconds that a packet state structure remains active. When the timeout valu...

  • Page 72

    70 c hapter 5: c onfiguring the r outer ■ total incomplete tcp/udp sessions high - defines the rate of new unestablished sessions that will cause the software to start deleting half-open sessions. ■ total incomplete tcp/udp sessions low - defines the rate of new unestablished sessions that will caus...

  • Page 73

    Firewall 71 special applications special applications let you choose specific ports to be open for specific applications to work properly with the network address translation (nat) feature of the router. Figure 56 special applications screen a list of popular applications has been included to choose...

  • Page 74

    72 c hapter 5: c onfiguring the r outer 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 applications through your router to your internal network. Since your internal computers are p...

  • Page 75

    Firewall 73 4 you can enable or disable each virtual server entry by checking or unchecking the appropriate enabled checkbox. 5 click apply to save the changes for each virtual server entry. Dmz if you have a client pc that cannot run an internet application properly from behind the firewall, you ca...

  • Page 76

    74 c hapter 5: c onfiguring the r outer schedule rule the router can be configured to restrict access to the internet, email or other network services at specific days and times. Define the time in this screen, and define the rules in the pc privileges screen (see page 75 ). Figure 59 schedule rule ...

  • Page 77

    Firewall 75 pc privileges the router can be configured to restrict access to the internet, email or other network services 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...

  • Page 78

    76 c hapter 5: c onfiguring the r outer 3 enter a description in the client pc description field, and the ip address or ip address range into the client pc ip address fields. 4 to bypass the url filter and content filter, check the corresponding bypass checkbox. If you check the two options: bypass ...

  • Page 79

    Firewall 77 url filter to configure the url filter feature, use the table on the url filter screen to specify the web sites (www.Somesite.Com) and/or keywords you want to filter on your network. For example, entering a keyword of xxx would block access to any url that contains the string xxx. Figure...

  • Page 80

    78 c hapter 5: c onfiguring the r outer content filter you can use the list on the content filter screen to specify the type of content that you want to filter out. The router comes with a 14-day free trial of the 3com content filter service (3csbcfs). To activate the 14-day free trial of the servic...

  • Page 81

    Firewall 79 4 if you are not sure about your subscription status, click check in subscription filtering status to find out if you have a current, valid subscription. 5 subjects are listed under core categories and productivity categories. You can define what content should be viewed/blocked using th...

  • Page 82

    80 c hapter 5: c onfiguring the r outer figure 66 server control add server screen 1 enter a description in the server description field, and the ip address or ip address range into the server ip address fields. 2 select the services that will be allowed. A list of popular services is given on this ...

  • Page 83

    Quality of service 81 quality of service the qos (quality of service) function allows you to differentiate your network traffic and provide it with high-priority forwarding service. Qos settings the bandwidth gap between lan and wan may significantly degrade performance of critical network applicati...

  • Page 84

    82 c hapter 5: c onfiguring the r outer click add to add a new traffic class rule (see figure 69 ). Figure 69 add new traffic class rule screen traffic statistics this screen shows the wan outbound traffic statistics of all the diffserv forwarding groups in the last 12 hours. This screen automatical...

  • Page 85

    Advanced 83 advanced from the advanced screen, you can configure: ■ security ■ static routes ■ rip ■ ddns ■ snmp ■ syslog ■ proxy arp security use the security screen to set the advanced security settings for the router. Figure 71 security screen ■ nat — before you enable nat (network address transl...

  • Page 86

    84 c hapter 5: c onfiguring the r outer you turn nat off, the computers on your network will not be able to access the internet. Other problems may also occur. ■ ipsec nat-t pass-through — nat-t (nat traversal) is an internet draft proposed to ietf in order to help the problems associated with passi...

  • Page 87

    Advanced 85 the mtu size on the wan interface, the client sends an internet control message protocol (icmp) error to the external server to request that the server negotiate the tcp maximum segment size (mss). However, this message may be blocked by some firewalls. When this occurs, the packet is dr...

  • Page 88

    86 c hapter 5: c onfiguring the r outer static routes you can configure static routes in this screen. To add a static route entry to the table, click add. To change an existing entry, click edit. To delete an entry, click delete. Figure 72 static routes screen this screen shows a list of current sta...

  • Page 89

    Advanced 87 rip rip (routing information protocol) - rip allows the network administrator to set up routing information on one rip-enabled device and send that information to all rip-enabled devices on the network. Figure 73 rip parameter screen you can set up rip independently on both lan and wan i...

  • Page 90

    88 c hapter 5: c onfiguring the r outer 5 use the poison reverse drop-down menu to enable or disable poison reverse on the router. Enabling poison reverse on your router allows it to indicate to other rip-enabled devices that they have both routes that point to each other, preventing data loops. 6 u...

  • Page 91

    Advanced 89 before you set up ddns, you must obtain an account, password or key and static domain name from your ddns provider. Ddns is disabled by default. Figure 74 dynamic domain name server (ddns) screen 1 check enable ddns. 2 select the provider, and then enter the necessary information provide...

  • Page 92

    90 c hapter 5: c onfiguring the r outer snmp snmp (simple network management protocol) allows remote management of your router by a pc that has an snmp management agent installed. Figure 75 snmp screen to configure snmp community: 1 in the community column, enter the name of the snmp communication c...

  • Page 93

    Advanced 91 you can configure your router to send status messages to the snmp management agent if a problem occurs on the network. To configure snmp traps: 1 in the ip address field, enter the ip address of the pc to which you want your router to send status messages. 2 in the community field, enter...

  • Page 94

    92 c hapter 5: c onfiguring the r outer proxy arp proxy arp is the technique in which one host, usually a router, answers arp requests intended for another machine. By "faking" its identity, the router accepts responsibility for routing packets to the "real" or intended destination. This heightens t...

  • Page 95

    System tools 93 system tools these screens allow you to manage different parameters of the router and perform certain administrative functions. Restart router sometimes it may be necessary to restart (or reboot) the router. Restarting the router from this screen will not delete any of your configura...

  • Page 96

    94 c hapter 5: c onfiguring the r outer ■ backup configuration — you can save your current configuration by clicking the backup button. Saving your configuration will allow you to restore it later if your settings are lost or changed. It is recommended that you backup your current configuration befo...

  • Page 97

    System tools 95 time zone you can set the time settings for the router on this screen. Figure 81 time zone screen the router keeps time by connecting to a network time protocol (ntp) server. This allows the router to synchronize the system clock to the internet. The synchronized clock in the router ...

  • Page 98

    96 c hapter 5: c onfiguring the r outer ping the ping tool is used to test if the network is working properly. Figure 82 ping screen 1 enter the ip address or domain name in the ip address or domain name field, and click ping. 2 select from the number of times to ping drop-down menu. 3 the router ke...

  • Page 99

    System tools 97 traceroute traceroute is the program that shows you the route over the network between two systems, listing all the intermediate routers a connection must pass through to get to its destination. It can help you determine why your connections to a given server might be poor, and can o...

  • Page 100

    98 c hapter 5: c onfiguring the r outer dns lookup dns lookup is the process of resolving an ip address (i.E. 192.168.11.137) to a host name (i.E. Xxxcompany.Net). Figure 84 dns lookup screen 1 enter the ip address or domain name in the ip address or domain name field, and click dns lookup. 2 the ro...

  • Page 101

    Status and logs 99 status and logs you can use the status screen to view version numbers for your router’s software and hardware and check the status of connections to wan, lan and wlan interfaces. Status figure 85 status screen this screen shows router status and statistics. Adsl status figure 86 a...

  • Page 102

    100 c hapter 5: c onfiguring the r outer atm pvc status figure 87 atm pvc status screen this screen shows atm pvc status and statistics. ■ click release to release the ip address from your isp. ■ click renew to obtain the ip address from your isp. Routing table this screen displays details for the d...

  • Page 103

    Status and logs 101 logs this screen shows any attempts that have been made to gain access to your network as well as the system activities. Figure 89 logs screen ■ click help to view the help file. ■ click save to save the log to the hard disk as a text file. When prompted for a location to save th...

  • Page 104

    102 c hapter 5: c onfiguring the r outer support/feedback you can use the support/feedback screen to obtain support and help, and also provide feedback to 3com. Support figure 90 support screen this screen shows support information. Feedback to provide feedback to 3com, please click provide feedback...

  • Page 105: Roubleshooting

    6 t roubleshooting basic connection checks ■ check that the router is connected to your computers and to the telephone line, and that all the equipment is powered on. Check that the lan status and sync leds on the router are illuminated, and that any corresponding leds on the nic are also illuminate...

  • Page 106

    104 c hapter 6: t roubleshooting ■ if you cannot browse to the router, use the winipcfg utility in windows 98/me to verify that your computer has received the correct address information from the router. From the start menu, choose run and then enter winipcfg. Check that the computer has an ip addre...

  • Page 107

    Wireless networking 105 4 press and hold the reset button on the rear panel (see “the rear panel (figure 4) of the router contains four lan ports, one adsl port, a reset button, a power ok led, and a power adapter socket.” on page 16 ) for 5 seconds. 5 the router will restart, and when the start-up ...

  • Page 108

    106 c hapter 6: t roubleshooting for more effective coverage you can try reorientating your antennae. Place one antenna vertically and one horizontally to improve coverage. Additionally consider moving the wireless computer closer to the router to confirm that the building structure or fittings are ...

  • Page 109

    Recovering from corrupted software 107 recovering from corrupted software if the system software has become corrupted, the router will enter a “recovery” state; dhcp is enabled, and the lan ip address is set to 192.168.1.1. Follow the instructions below to upload a new copy of the system software to...

  • Page 110

    108 c hapter 6: t roubleshooting frequently asked questions how do i reset the router to factory defaults? See “forgotten password and reset to factory defaults” on page 104 . How many computers on the lan does the router support? A maximum of 253 computers on the lan are supported. How many wireles...

  • Page 111: Ip A

    A ip a ddressing the internet protocol suite the internet protocol suite consists of a well-defined set of communications protocols and several standard application protocols. Transmission control protocol/internet protocol (tcp/ip) is probably the most widely known and is a combination of two of th...

  • Page 112

    110 a ppendix a: ip a ddressing for your network to work correctly, all devices on the network must have: ■ the same sub-network address. ■ the same subnet mask. The only value that will be different is the specific host device number. This value must always be unique. An example ip address is ‘192....

  • Page 113

    How does a device obtain an ip address and subnet mask? 111 this type of ip address operates on a subnet mask of ‘255.255.0.0’. See table 4 for an example about how a network (only four computers represented) and a router might be configured. Table 4 ip addressing and subnet masking how does a devic...

  • Page 114

    112 a ppendix a: ip a ddressing an ip address at random from the industry standard subnet of 169.254.X.X (with a 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 s...

  • Page 115: Echnical

    B t echnical s pecifications this section lists the technical specifications for the officeconnect adsl wireless 54mbps 11g firewall router. Officeconnect adsl wireless 54mbps 11g firewall router interfaces dsl connection lan connection — four 10 mbps/100 mbps dual speed ethernet ports (10base-t/100...

  • Page 116

    114 a ppendix b: t echnical s pecifications operating temperature 0 °c to 40 °c (32 °f to 105 °f) power 8va, 25 bthu/hr humidity 0% to 90% (non-condensing) humidity dimensions ■ width = 220 mm (8.7 in.) ■ depth = 133 mm (5.2 in.) ■ height = 38 mm (1.5 in.) weight approximately 550 g (1.1 lbs) standa...

  • Page 117

    Officeconnect adsl wireless 54mbps 11g firewall router 115 system requirements operating systems the router will support the following operating systems: ■ windows 98se ■ windows nt 4.0 ■ windows me ■ windows 2000 ■ windows xp ■ mac os 8.5 or higher ■ unix ethernet performance the router complies to...

  • Page 118

    116 a ppendix b: t echnical s pecifications.

  • Page 119: Afety

    C s afety i nformation important safety information warning: warnings contain directions that you must follow for your personal safety. Follow all directions carefully. You must read the following safety information carefully before you install or remove the unit: warning: the router generates and u...

  • Page 120

    118 a ppendix c: s afety i nformation warning: rj-45 ports. These are shielded rj-45 data sockets. They cannot be used as telephone sockets. Only connect rj-45 data connectors to these sockets. Wichtige sicherheitshinweise vorsicht: warnhinweise enthalten anweisungen, die sie zu ihrer eigenen sicher...

  • Page 121

    119 vorsicht: es sind keine von dem benutzer zu ersetzende oder zu wartende teile in dem gerät vorhanden. Wenn sie ein problem mit dem router haben, das nicht mittels der fehleranalyse in dieser anleitung behoben werden kann, setzen sie sich mit ihrem lieferanten in verbindung. Vorsicht: vor dem aus...

  • Page 122

    120 a ppendix c: s afety i nformation conditions ne sont maintenues que si l'équipement auquel il est raccordé fonctionne dans les mêmes conditions. Avertissement: il n’y a pas de parties remplaceables par les utilisateurs ou entretenues par les utilisateurs à l’intérieur du moyeu. Si vous avez un p...

  • Page 123: Ser

    D e nd u ser s oftware l icense a greement 3com corporation end user software license agreement you should carefully read the following terms and conditions before downloading, installing and using this product, the use of which is licensed by 3com corporation ("3com") to its customers for their use...

  • Page 124

    122 a ppendix d: e nd u ser s oftware l icense a greement and developed solely at private expense. The software is delivered as "commercial computer software" as defined in dfars 252.227-7014 (june 1995) or as a commercial item as defined in far 2.101(a) and as such is provided with only such rights...

  • Page 125: Btaining

    E o btaining s upport for y our p roduct register your product warranty and other service benefits start from the date of purchase, so it is important to register your product quickly to ensure you get full use of the warranty and other service benefits available to you. Warranty and other service b...

  • Page 126

    124 a ppendix e: o btaining s upport for y our p roduct troubleshoot online you will find support tools posted on the 3com web site at www.3com.Com . 3com knowledgebase helps you troubleshoot 3com products. This query-based interactive tool is located at http://knowledgebase.3com.Com and contains th...

  • Page 127

    Contact us 125 to send a product directly to 3com for repair, you must first obtain a return authorization number (rma). Products sent to 3com, without authorization numbers clearly marked on the outside of the package, will be returned to the sender unopened, at the sender’s expense. If your produc...

  • Page 128

    126 a ppendix e: o btaining s upport for y our p roduct austria belgium denmark finland france germany hungary ireland israel italy 0800 297 468 0800 71429 800 17309 0800 113153 0800 917959 0800 182 1502 06800 12813 1 800 553 117 1800 945 3794 800 879489 luxembourg netherlands norway poland portugal...

  • Page 129

    Contact us 127 us and canada telephone technical support and repair 1 800 876 3266 country telephone number country telephone number.

  • Page 130

    128 a ppendix e: o btaining s upport for y our p roduct.

  • Page 131: Lossary

    G lossary 802.11b the ieee specification for wireless ethernet which allows speeds of up to 11 mbps. The standard provides for 1, 2, 5.5 and 11 mbps data rates. The rates will switch automatically depending on range and environment. 802.11g the ieee specification for wireless ethernet which allows s...

  • Page 132

    130 g lossary auto-negotiation some devices in the range support auto-negotiation. Auto-negotiation is where two devices sharing a link, automatically configure to use the best common speed. The order of preference (best first) is: 100base-tx full duplex, 100base-tx half duplex, 10base-t full duplex...

  • Page 133

    G lossary 131 dns server address dns stands for domain name system, which allows internet host computers to have a domain name (such as 3com.Com) and one or more ip addresses (such as 192.34.45.8). A dns server keeps a database of host computers and their respective domain names and ip addresses, so...

  • Page 134

    132 g lossary hub a device that regenerates lan traffic so that the transmission distance of that signal can be extended. Hubs are similar to repeaters, in that they connect lans of the same type; however they connect more lans than a repeater and are generally more sophisticated. Ieee institute of ...

  • Page 135

    G lossary 133 lan local area network. A network of end stations (such as pcs, printers, servers) and network devices (hubs and switches) that cover a relatively small geographic area (usually not larger than a floor or building). Lans are characterized by high transmission speeds over short distance...

  • Page 136

    134 g lossary rj-45 a standard connector used to connect ethernet networks. The “rj” stands for “registered jack”. Router a device that acts as a central hub by connecting to each computer's network interface card and managing the data traffic between the local network and the internet. Server a com...

  • Page 137

    G lossary 135 traffic the movement of data packets on a network. Universal plug and play universal plug and play is a system which allows compatible applications to read some of their settings from the router. This allows them to automatically configure some, or all, of their settings and need less ...

  • Page 138

    136 g lossary wlan wireless local area network. A wlan 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 wireless networking. Encryption strength is 25...

  • Page 139

    137 r egulatory n otices for the officeconnect adsl wireless 54mbps 11g firewall router g eneral s tatements the 3com officeconnect adsl wireless 54mbps 11g firewall router (wl-552) must be installed and used in strict accordance with the manufacturer's instructions as described in the user document...

  • Page 140

    138 complies with part 15 of the fcc rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. I ndustry c anada - rf c omplian...

  • Page 141

    139 intended use: adsl 802.11g/b firewall router for connection to adsl networks note: to ensure product operation is in compliance with local regulations, select the country in which the product is installed. Refer to 3crwdr101a-75 user guide. Česky [czech] 3com coporation tímto prohlašuje, ze tent...

  • Page 142

    140 a copy of the signed declaration of conformity can be downloaded from the product support web page for the 3com officeconnect adsl wireless 54 mbps 11g firewall router at http://www.3com.Com. Also available at http://support.3com.Com/doc/wl-552_eu_doc.Pdf. Eu - r estrictions for u se in the 2.4g...

  • Page 143

    141 前項合法通信，指依電信規定作業之無線電信。 低功率射頻電機須忍受合法通信或工業， 科學及醫療用 電波輻射性電機設備之干擾。 rtte01: 1. 本機限在不干擾合法電台與不受被干擾保障條件下於室內使用 2. 為減少電波干擾，請妥適使用.

  • Page 144

    142.

  • Page 145: Ndex

    I ndex numbers 128-bit wep 46 128-bit wep screen 46 1483 bridge mode 55 64-bit wep screen 47 a access control screen 62 add pc screen 63 add schedule rule screen 65 addresses ip 85 admin password screen 75 adsl status screen 77 advanced screen 68 automatic addressing 87 b backup/restore settings scr...

  • Page 146

    142 i ndex configuring 56 mac address filtering screen 66 mode 30 n nat (network address translation) 68 nat-t (nat traversal) 68 network addresses 85 networking wireless 81 nic wireless 14 p password 27, 75 poison reverse 58 pppoa 31 pppoa screen 31 pppoa settings screen 52 pppoe 26, 30, 31 pppoe s...