Nortel Networks NB5PLUS4/W manual More about Port Forwarding

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Thus Port Forwarding is necessary to run certain games, chat clients, video-confer- encing and other kinds of applications. You might also need to configure port-for- warding if you intend to host a web server or mail server that is to be visible outside your LAN.

TIP:	In situations where you are hosting a Web Site or, for example, setting up
	a regular NetMeeting link, it is advisable to consider implementing a Fixed
	IP address, otherwise the dynamic IP address allocated by DHCP will need
	to be communicated prior to every user session.

More about Port Forwarding

In TCP/IP and UDP networks a port is a 16-bit number used to identify which ap- plication program (usually a server) incoming connections should be delivered to. Some ports have numbers that are pre-assigned to them by the IANA (the Inter- net Assigned Numbers Authority), and these are referred to as “well-known ports”. Servers follow the well-known port assignments so clients can locate them.

If you wish to run a server on your network that can be accessed from the WAN (i.e. from other machines on the Internet that are outside your local network), or any application that can accept incoming connections (e.g. Peer-to-peer/P2P soft- ware such as instant messaging applications and P2P file-sharing applications) and are using NAT (Network Address Translation), then you will usually need to config- ure your router to forward these incoming connection attempts using specific ports to the PC on your network running the application. You will also need to use port forwarding if you want to host an online game server.

The reason for this is that when using NAT, your publicly accessible IP address will be used by and point to your router, which then needs to deliver all traffic to the private IP addresses used by your PCs.

The Internet Assigned Numbers Authority (IANA) is the central coordinator for the assignment of unique parameter values for Internet protocols. Port numbers range

NB5Plus4/W User Guide	YML754Rev1
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Contents Page Contents YML754 Rev1 NB5Plus4/W User Guide To RJ-11 adapter Overview NB5Plus4/W Package Contents Minimum System Requirements Do I need a Micro filter? Adsl LED IndicatorsPPP USBBack Panel Ports USBRestoring Factory Defaults Admin and password adminField Setting Details Default SettingsModem Access LAN ManagementConnecting your NB5Plus4/W Connecting your NB5Plus4/W Adsl Modem via EthernetConnecting your NB5Plus4/W Adsl Modem via USB Installing the USB driver Windows 98/Me/2000/XP onlyNB5Plus4W Antenna Instructions Bend the antenna to a 90o angleConfiguring your NB5Plus4/W Click on Log EasyConfig page will be displayedTIP Windows 2000 PCs Computer Hardware ConfigurationWindows XP PCs Windows Me PCsWindows 95, 98 PCs Network Protocols list boxAdvanced Settings Setup LAN Groups SetupLAN ConfigurationInterfaces IP Address NetMaskLanGroup #3 Configuring LAN Groups IP Settings Use the followingg static IP address Renew buttonPPP IP Address Server OnServices Ethernet SwitchType WAN SetupNew ConnectionName SharingPriority Bits OptionsVlan ID MTU Debug On DemandEnforce MTU PPP UnnnumberedPCR VPIVCI SCRPPPoA Connection Setup Mask Static Connection SetupEncapsulation DNSGateway Dhcp Connection SetupBridge Settings Select LANClip Connection Setup ARP ServerGdmt WAN SetupModemT1413 GliteLogout Advanced AdvancedUPnP AdvancedSNTP Pollingg Interval TimeoutPrimary, Secondary Tertiary Sntp Servers Retry CountAdvancedIPQoS QoS SetupRules Configuration Traffic Queuing Configuration Queue PrioritiesConfiguration En-queuing PolicyDe-queuing Policy WRR Queue Scheduler for Medium and Low priority queuesTOS-to-Priority Mapping AdvancedLAN Clients Advanced LAN IsolationCreate Bridge Filter Rules Enable/Disable Bridge FilteringAdvanced Bridge Filters Edit or Delete Bridge Filter RulesAllow Incomingg Pingg DMZ SettingsWAN Connnection LAN IPSelect LAN group Advanced Port Forwarding Creating Custom RulesConnnection AddressSource IP Address ApplicationProtocol Source NetmaskDestination Port Map Adding Custom Rules to Applied Rules ListDestination Port Start Destination Port End Advanced Access Control Advanced IP FiltersToolsUser Management ToolsSystem CommandsTools ToolsPing Test ToolsUpdate FirmwareUser will be required to login again Logged into the modem for the numberAdvanced Multicast Hidden Bridge Filter RulesTo access Multicasting, click on AdvancedMulticast Configuring Static Routing Advanced Static RoutingEnable RIP Enable PasswordAdvancedDynamic Routing DirectionSelect ‘Out’ AdvancedPort ForwardingSelect ‘In’ Select ‘Both’More about Port Forwarding Well-know and registered Ports Easy Port Forwarding Applying Pre-Defined RulesStatusNetwork Statistics StatusToolsModem Test Status Connection Status Status Product Information Status Dhcp ClientsStatus Modem Status As well as other information about the connectionHelp Appendix a NB5Plus4W Wireless FeaturesEasyConfig Status System LogWireless Main Screen YML754 Rev1 NB5Plus4/W User Guide WirelessSetup Wireless Setup Field DescriptionsSsid Enable AP Enables/disables the access pointService Set Identifier of the AP. Unique Ssid to your AP. The SsidEnables/disables the Hidden Ssid Hidden SsidChannnel B/G Wireless stations will communicateExtra layer of security Channel on which the AP4GHz, the default is Telecom Standardization InstitutionChannel can be selected accord Practise to have your wireless networkChannnel B/G cont’d Ing to the band selection. It is goodNeighbouring wireless networks Mixed mode Both 11b and 11g11b only Mode Only 11b devices are Able to connect to the NB5Plus4W 11g only Mode Only 11g devices are Bles the 4x feature. This function is TIUser Isolation User IsolationSave Your Changes Dtim period WirelessConfigurationBeacon Period Fragmentation Threshold Power LevelRTS threshold Multi Domain CapabilityDestination Port WirelessSecurityVideo Blast Support NoneConnect to the NB5Plus4W WirelessSecurityWEP802.1x Encryption Key Enable WEP Wireless SecurityAuthentication Type WEP CipherPort Wireless SecurityServer IP Address SecretWirelessSecurityWPA Group Key IntervalWireless Management Associated Stations WirelessManagementWirelessManagementAccess List Wireless Management Multiple SsidCreate an Access List Appendix B Specification Log outEncapsulation Support Sntp NAT Application Level Gateway for Popular ApplicationsSecurity NB5Plus4/W User Guide YML754Rev1 Hardware PPP LEDAppendix D Glossary RJ11 connector and cableAppendix C Cable Connections RJ-45 Network PortsATM 10BASE-T100BASE-T Dhcp Cross-Over Cabling Straight and crossover cable configurationStraight-Through Cabling Into IP addresses. DNS information is distributed hier Ponent in DSL is a digital signal. See also analogDomain Name System. The DNS maps domain names Archically throughout the Internet among computersGGP DSLFTP GREIgmp HttpIcmp ISPPots NATNIC RIP SdnsTftp TCPTCP/IP TTLWWW Appendix E Registering your NetComm ProductWAN Customer Information Appendix F Legal & Regulatory InformationContact Information NetComm web site atProduct Warranty NB5Plus4/W User Guide YML754Rev1 108Limitations of Warranty NB5Plus4/W User Guide YML754Rev1 110 YML754 Rev1 NB5Plus4/W User Guide 111