Netopia R7200 manual Advanced IP/IPX router configuration options

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IP Setup and Network Address Translation 10-7

Just as an IP address specifies a particular computer on a network, ports are addresses that specify a particular service in a computer. There are many universally agreed-upon ports assigned to various services. For example:

■Web servers typically use port number 80

■All FTP servers use port number 21

■Telnet uses port number 23

■SNMP uses port number 161

To help direct incoming IP traffic to the appropriate server, the Netopia R7200 lets you associate these and other port numbers with distinct IP addresses on your internal LAN using exported services. See “IP setup” on page 10-11for details.

Advanced IP/IPX router configuration options

Advanced users can optionally use connection profiles to configure the IP and IPX protocol stack interfaces on the SDSL link. You need not explicitly define these parameters, however. The following information is provided as reference to the possible router configurations advanced users may desire.

The IP router interface on the SDSL link:

■may be numbered or unnumbered.

■may or may not use Network Address Translation (NAT).

■will attempt to autoconfigure itself without an explicitly configured connection profile, if permitted to do so by the setting of the Must Match a Defined Profile item in the Default Profile screen. See “The default profile” on page 8-6.

The link up process at the interface between the SDSL data link encapsulation module and the IP router functions as follows:

■When the SDSL data link comes up, the router will search for a configured connection profile that specifies SDSL encapsulation.

■If more than one SDSL profile exists, the router will use the first such profile.

■If no SDSL profile exists, and the Must Match a Defined Profile field in the Default SDSL Profile is set to No, the router will construct a Default Profile, and the link up process will continue using this constructed profile as if it were an explicitly configured one.

■If no SDSL profile exists, and the Must Match a Defined Profile field in the Default SDSL Profile is set to Yes, IP will not come up on the SDSL link. The router will log an “IP connection refused” event in the WAN Event History.

■If an SDSL profile exists (or a default one has been constructed), the router will attempt to configure its interface on the SDSL link using the information stored in the profile.

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Contents Netopia R7200 Sdsl Router Part Number Contents Part II Advanced Configuration Contents Aurp Snmp Xmodem Part III Appendixes User’s Reference Guide Part I Getting Started User’s Reference Guide Overview Features and capabilitiesChapter Introduction How to use this guide Finding an Internet service provider Chapter Setting Up Internet ServicesUnique requirements Setting up a Netopia R7200 account Obtaining an IP addressPricing and support Endorsements Deciding on an ISP accountLocal LAN IP address information to obtain Obtaining information from the ISPWith Network Address Translation Without Network Address TranslationUser’s Reference Guide Find a location Chapter Making the Physical ConnectionsWhat you need Identify the connectors and attach the cablesYour router on Netopia R7200 Sdsl Router back panel portsNetopia R7200 LED front panel Netopia R7200 Sdsl Router status lightsReadying computers on your local network Chapter Connecting to Your Local Area NetworkUser’s Reference Guide Connecting to an Ethernet network 10Base-T Adding an external modem Connecting to a LocalTalk network Chapter Setting up your Router with the SmartStart Wizard Before running SmartStart SmartStart Wizard configuration screens Setting up your Router with the SmartStart WizardEasy option Advanced setupAdvanced option Configuration screen on Configuration tab Dynamic configuration recommendedStatic configuration optional Add. Repeat this process for the secondary DNS TCP/IP Configuring TCP/IP on Macintosh computersTCP/IP or MacTCP Dynamic configuration using MacIP optional Setting up your Router with the SmartStart Wizard User’s Reference Guide Chapter Console-Based Management Connecting through a Telnet session Configuring Telnet software Connecting a console cable to your routerPC ANSI-BBS Navigating through the console screensAccessing the Easy Setup console screens Chapter Easy SetupEasy Setup console screens See Appendix A, Troubleshooting, for more suggestions Quick Easy Setup connection path Main Menu appears Sdsl Line ConfigurationPrevious Screen Next Screen Easy Setup ProfileIP Easy Setup Easy Setup Security Configuration Previous Screen To Main Menu Part II Advanced Configuration User’s Reference Guide WAN configuration Chapter WAN and System ConfigurationATM VPI ATM VCI Creating a new Connection Profile IPX Profile Parameters Remote IPX Network Datalink PPP/MP Options Data Compression Default profile Main Menu Default Profile screen appears IP parameters default profile screen System configuration screens IPX parameters default profile screenNavigating through the system configuration screens System configuration features Filter sets firewalls Network protocols setupIP address serving Date and timeConsole configuration Snmp Simple Network Management Protocol Upgrade feature setSecurity LoggingInstalling the Syslog client User’s Reference Guide Chapter Line Backup Backup Configuration screen appears Atdt Backup Configuration screenIP Setup screen Connection Profiles Using Scheduled Connections with BackupScheduled Connections screen appears Management/Statistics Force Recovery Snmp Support QuickViewEvent Logs User’s Reference Guide Network Address Translation features Chapter IP Setup and Network Address TranslationHOW NAT Works Previous Screen Using Network Address TranslationV2 multicast Numbered Sdsl WAN1 Associating port numbers with nodesAdvanced IP/IPX router configuration options Data Link Options IP Setup and Network Address Translation Network Address Translation guidelines IP setup User’s Reference Guide Select Add Export. The Add Exported Service screen appears Select Service. a pop-up menu of services and ports appears IP subnets User’s Reference Guide Static routes Viewing static routes Static Routes screen will appearAdding a static route Deleting a static route Rules of static route installationModifying a static route Main Menu System Configuration IP Address Serving 176.163.222.10 Dhcp NetBios Options Serve Bootp Clients IP Address Pools IP Setup and Network Address Translation Dhcp NetBIOS Options NetBios Type MacIP KIP forwarding setup You have finished your IP setup User’s Reference Guide IPX features Chapter IPX SetupIPX definitions Internetwork Packet Exchange IPXIPX address Service Advertising Protocol SAPSocket Routing Information Protocol RIPIPX spoofing NetBIOSIPX setup screen Default Gateway Address IPX routing tables User’s Reference Guide AppleTalk protocol Chapter AppleTalk SetupAppleTalk networks AT Routing Table Routers and seeding MacIPInstalling AppleTalk Upgrade Feature Set Configuring AppleTalk EtherTalk setupLocalTalk setup Aurp Free Trade Zone Aurp setupViewing Aurp partners Modifying an Aurp partner Adding an Aurp partnerConfiguring Aurp Options Deleting an Aurp partnerReceiving Aurp connections Aurp Options Tickle Interval Hhmmss User’s Reference Guide Quick View status overview Chapter Monitoring ToolsGeneral status Status lights Current statusGeneral Statistics Statistics & LogsNetwork Interface Event historiesPhysical Interface WAN Event History Device Event History Routing tablesIP routing table AppleTalk routing table IPX routing tableIPX Sap Bindery table Served IP Addresses IP Address Lease Management screen appears Snmp System InformationCommunity strings Snmp Setup screenSnmp traps Viewing IP trap receivers Setting the IP trap receiversModifying IP trap receivers Deleting IP trap receiversWeb-based management pages Event History pages WAN Event History Device Event History User’s Reference Guide User accounts Chapter SecuritySuggested security measures Protecting the configuration screens Protecting the Security Options screenDial-in console access Telnet access Enable SmartStart/SmartView/Web serverAbout filters and filter sets What’s a filter and what’s a filter set?Filter priority How filter sets workHow individual filters work Port numbers filtering ruleParts of a filter Other filter attributes Port number comparisonsUDP Putting the parts togetherFiltering example #2 Filtering example #1Disadvantages of filters Design guidelinesWorking with IP filters and filter sets An approach to using filtersNaming a new filter set Adding a filter setAdding filters to a filter set Input and output filters-source and destinationADD this Filter NOW Cancel Viewing filters Viewing filter setsModifying filters Deleting filtersSample IP filter set Modifying filter setsDeleting a filter set TCP Icmp UDP Possible modifications User’s Reference Guide IPX filters Adding a packet filter IPX packet filtersViewing and modifying packet filters Deleting a packet filter IPX packet filter setsViewing and modifying packet filter sets Adding a packet filter setNo Match Viewing and modifying SAP filters IPX SAP filtersDeleting a packet filter set Deleting a SAP filter Adding a SAP filterAdding a SAP filter set IPX SAP filter setsViewing and modifying SAP filter sets Deleting a SAP filter set Basic protocol types Firewall tutorial General firewall termsBasic IP packet components Firewall Logic Firewall design rulesExample TCP/UDP Ports Logical and function Binary representationExample IP filter set screen Implied rulesEstablished connections Example network Filter basicsExample Example filtersExample Example Chapter Utilities and Diagnostics Ping Receive return Ping packet Stop Ping Trace RouteTelnet client Disconnect Telnet console session Factory defaultsUpdating firmware Transferring configuration and firmware files with TftpDownloading configuration files Transferring configuration and firmware files with Xmodem Uploading configuration filesIdle Do you want to send a saved configuration to your Netopia? Restarting the system Part III Appendixes User’s Reference Guide Configuration problems Appendix a TroubleshootingNetwork problems Console connection problemsPower outages How to reset the router to factory defaultsTechnical support How to reach usBefore contacting Netopia Environment profileFAX-Back Online product informationUser’s Reference Guide About IP addressing What is IP?Appendix B Understanding IP Addressing Subnets and subnet masks Subnet masks Example Using subnets on a Class C IP internetISP Network Network configurationBackground Example Working with a Class C subnetDistributing IP addresses Technical note on subnet masking Dhcp address serving Netopia R7200 Dhcp server characteristicsConfiguration Manually distributing IP addresses Using address servingMacIP serving Serve dynamic WAN clientsUnderstanding IP Addressing B-9 Tips and rules for distributing IP addressesDhcp example Internet Nested IP subnets0.0 C.1 WAN 3719 Packet header types BroadcastsUser’s Reference Guide Background Appendix C Understanding Netopia NAT BehaviorNetwork configuration User’s Reference Guide Understanding Netopia NAT Behavior C-3 Netopia Router WWW Server ISP Router LAN Understanding Netopia NAT Behavior C-5 Exported servicesImportant notes Understanding Netopia NAT Behavior C-7 Summary Appendix D Binary Conversion Table Decimal Binary Appendix E Further Reading User’s Reference Guide Further Reading E-3 User’s Reference Guide Pinouts for Auxiliary port modem cable Appendix F Technical Specifications and Safety InformationEnvironment Power requirementsDescription Software and protocols Regulatory notices Agency approvalsNorth America InternationalDeclaration for Canadian users Important safety instructionsBattery Telecommunication installation cautionsAppendix G About Sdsl User’s Reference Guide Glossary User’s Reference Guide Glossary User’s Reference Guide Remapping See network number remapping User’s Reference Guide Glossary User’s Reference Guide Numerics IndexIndex-2 Index-3 Index-4 Index-5 Index-6 Limited Warranty and Limitation of Remedies User’s Reference Guide
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