Understanding Netopia NAT Behavior F-7 | Netopia R3100 specs

Understanding Netopia NAT Behavior F-7

IP Profile Parameters

Remote IP Address:	127.0.0.2
Remote IP Mask:	255.255.255.0
Address Translation Enabled:	Yes
Filter Set...
Remove Filter Set
Receive RIP:	No

Enter the remote IP network's IP address (form xxx.xxx.xxx.xxx decimal).

Configure IP requirements for a remote network connection here.

Toggling Address Translation Enabled to Yes enables the Netopia R3100 to send out an all-zeros IPCP address that requests an IP to be assigned to the Netopia R3100’s WAN interface. Note that the remote IP address is 127.0.0.2, which should also be the Default Gateway under IP Setup in System Conﬁguration. This is done for proﬁle matching purposes and because the IP address of the router the Netopia R3100 is dialing is not always known.

As mentioned earlier in this appendix, NAT works well for IP sessions originated on the Netopia R3100’s LAN interface destined for the Internet without any additional conﬁguration. For incoming IP connections from the Internet to a host on the Netopia R3100’s LAN interface, Exported Services need to be used.

Exported Services are conﬁgured under IP Setup in System Conﬁguration. This is where a particular type of TCP or UDP service originating from the Internet is redirected to a host on the Netopia R3100’s LAN interface. An example of this screen is as follows:

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Netopia R3100 manual Understanding Netopia NAT Behavior F-7

Contents

Netopia R3100 Isdn Routers Part Number Contents Ii User’s Reference Guide Part II Advanced Configuration Iv User’s Reference Guide Aurp Vi User’s Reference Guide Part III Appendixes Viii User’s Reference Guide Contents User’s Reference Guide Conﬁguration options for your Netopia R3100 Isdn Router Small Ofﬁce connection to the Internet Small Ofﬁce connection to the Internet Direct Connection to a Corporate Ofﬁce Telecommuter Conﬁgured to accept incoming dial-up connections Conﬁgured for Idsl Part I Getting Started User’s Reference Guide Chapter Introduction Features and capabilitiesOverview Introduction How to use this guide Find a location Chapter Making the Physical ConnectionsWhat you need Making the Physical Connections Identify the connectors and attach the cables Netopia R3100 Isdn Router Back Panel Ports Cable to your router on Services on Netopia R3100 LED front panel Netopia R3100 Isdn Router Status Lights Setting up your Router with the SmartStart Wizard Chapter Setting up your Router with the SmartStart Wizard Before running SmartStart SmartStart Wizard conﬁguration screens Setting up your Router with the SmartStart Wizard Easy option Easy or Advanced setup Setting up your Router with the SmartStart Wizard User’s Reference Guide Setting up your Router with the SmartStart Wizard User’s Reference Guide Advanced option Connection Proﬁle screen on Conﬁguration tab Dynamic conﬁguration recommended Static conﬁguration optional Add. Repeat this process for the secondary DNS TCP/IP Conﬁguring TCP/IP on Macintosh computers TCP/IP or MacTCP Dynamic conﬁguration using MacIP optional Setting up your Router with the SmartStart Wizard User’s Reference Guide Connecting Your Local Area Network Chapter Connecting Your Local Area Network Readying computers on your local network 10Base-T Connecting to an Ethernet network 10BASE-T Remote console Connecting to a LocalTalk network Wiring guidelines for PhoneNET cabling User’s Reference Guide Chapter SmartView SmartView overviewSmartView General Machine information Navigating SmartView Event history pages Connection Proﬁles Device Event History WAN Event History Standard Html web-based monitoring pages User’s Reference Guide Chapter Console-based Management About Console-based ManagementConsole-based Management Connecting through a Telnet session Conﬁguring Telnet software Connecting a local terminal console cable to your router PC ANSI-BBS Navigating through the console screens User’s Reference Guide Easy Setup console screens Chapter Easy SetupHow to access the Easy Setup console screens Easy Setup See Appendix A, Troubleshooting, for more suggestions Isdn Easy Setup Beginning Easy Setup PPP Cancel Idsl Easy Setup Previous Screen Easy Setup Proﬁle User’s Reference Guide Previous Screen Next Screen IP Easy Setup Easy Setup Security Conﬁguring Frame Relay Isdn Easy Setup Frame Relay screens WAN Conﬁguration Frame Relay screens Setup Isdn Line Configuration Frame Relay conﬁguration Easy Setup Frame Relay Dlci conﬁguration Displaying a Frame Relay Dlci conﬁguration table Changing a Frame Relay Dlci conﬁguration Adding a Frame Relay Dlci conﬁguration ADD Dlci NOW Cancel Deleting a Frame Relay Dlci conﬁguration Part II Advanced Configuration User’s Reference Guide Chapter WAN and System Configuration Creating a new Connection ProﬁleWAN and System Conﬁguration Add Connection Proﬁle screen appears IPX Profile Parameters Remote IPX Network BAP Telco Options Initiate Data Service 64 kb/sec Dial Default Proﬁle How the default proﬁle works Configuration Default Profile Customizing the Default Proﬁle IP parameters default proﬁle screen WAN and System Conﬁguration Auxiliary Port Conﬁguration IPX parameters default proﬁle screen System Conﬁguration screens System Conﬁguration features PAP Filter Sets Firewalls Network Protocols SetupIP Address Serving Date and Time MM/DD/YY Console Conﬁguration Upgrade Feature SetSnmp Simple Network Management Protocol Security Logging Telephone setup Nov Chapter Using SmartPhone for Telephone Services Using SmartPhone for Telephone ServicesSpecifying telephone connections Inbound Directory Number Using SmartPhone for Telephone Services Preview Ring Deﬁning priority ringing Line provisioning Advanced calling features Conﬁguring supplementary services Chapter Call Accounting and Default Answer Profile Cost control feature -- call accountingCall Accounting and Default Answer Proﬁle Viewing call accounting statistics Call Accounting Statistics screen appears Scheduled connections Viewing scheduled connections Adding a scheduled connection Set Weekly Schedule Set Once-Only Schedule How the Default Answer Proﬁle works Default Answer ProﬁleModifying a scheduled connection Deleting a scheduled connection Customizing the default proﬁle Call Accounting and Default Answer Proﬁle Call acceptance scenarios Chapter IP Setup and Network Address Translation Network Address Translation featuresIP Setup and Network Address Translation HOW NAT Works Using Network Address Translation ISP Using multiple Connection Proﬁles Associating port numbers to nodesNetwork Address Translation guidelines IP setup IP Setup and Network Address Translation Select Add Export. The Add Exported Service screen appears IP Setup IP subnets IP Setup and Network Address Translation Static routes Viewing static routes Adding a static route Rules of static route installation Modifying a static routeDeleting a static route Main System IP Address Menu Configuration Serving 163.176.56.90 Dhcp NetBIOS Options MacIP Kip Forwarding Options You have ﬁnished your IP Setup IPX Features Chapter IPX SetupIPX Setup IPX Deﬁnitions IPX address Service Advertising Protocol SAPSocket Routing Information Protocol RIP NetBIOS IPX setupIPX Spooﬁng Default Gateway Address IPX routing tables User’s Reference Guide Chapter AppleTalk Setup Installing AppleTalkAppleTalk Setup AppleTalk protocol AppleTalk networks AppleTalk Setup Aurp MacIP Routers and seeding Conﬁguring AppleTalk EtherTalk Setup LocalTalk Setup Aurp setup Viewing Aurp partnersAurp Free Trade Zone Modifying an Aurp partner Adding an Aurp partner Deleting an Aurp partner Receiving Aurp connectionsConﬁguring Aurp Options User’s Reference Guide Chapter Monitoring Tools Quick View status overviewMonitoring Tools General status Status lights Current status General Statistics Statistics & Logs Event histories Physical InterfaceNetwork Interface Request from our DN WAN Event History Device Event History Routing tables IP routing table IPX routing table IPX Sap Bindery tableAppleTalk routing table Served IP Addresses IP Address Lease Management screen appears Snmp System Information Community strings Snmp Setup screen Snmp traps Viewing IP trap receivers Setting the IP trap receiversModifying IP trap receivers Deleting IP trap receivers User’s Reference Guide Chapter Security Suggested security measuresSecurity User accounts Protecting the Security Options screenProtecting the conﬁguration screens Dial-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 work Packet First filter Match? Yes ﬁlter’s actions How individual ﬁlters workﬁltering rule Parts of a ﬁlter Port number comparisons Port numbers Putting the parts together Other ﬁlter attributes Filtering example #1 UDP Filtering example #2 Design guidelines An approach to using ﬁlters Working with IP ﬁlters and ﬁlter setsDisadvantages of ﬁlters Adding a ﬁlter set Input and output ﬁlters-source and destination Naming a new ﬁlter set Adding ﬁlters to a ﬁlter set Netopia R-series Router ADD this Filter NOW Cancel Viewing ﬁlters Viewing ﬁlter setsModifying ﬁlters Deleting ﬁlters Modifying ﬁlter sets Deleting a ﬁlter setSample IP ﬁlter set TCP Icmp UDP Possible modiﬁcations Security IPX ﬁlters IPX packet ﬁlters Viewing and modifying packet ﬁltersAdding a packet ﬁlter Deleting a packet ﬁlter IPX packet ﬁlter setsViewing and modifying packet ﬁlter sets Adding a packet ﬁlter set ADD Filter SET NOW Cancel IPX SAP ﬁlters Deleting a packet ﬁlter setViewing and modifying SAP ﬁlters Adding a SAP ﬁlter Deleting a SAP ﬁlter IPX SAP ﬁlter setsViewing and modifying SAP ﬁlter sets Adding a SAP ﬁlter set Deleting a SAP ﬁlter set Firewall tutorial General Firewall Terms Basic IP Packet ComponentsBasic Protocol Types Firewall design rules Example TCP/UDP PortsFirewall Logic Binary Representation Logical ANDingImplied Rules Filter Basics Established ConnectionsExample IP Filter Set Screen Example Filters Example NetworkExample Example Example Using the SecurID token card Token Security AuthenticationKey Security Authentication Features of the Netopia R3100 Securing network environments Conﬁguring for security authentication Security authentication components Establishing a dial-on-demand DOD connection call Connecting using security authentication Current Connection Status Establishing a manual connection call User’s Reference Guide Utilities and Diagnostics Chapter Utilities and Diagnostics Start Ping Ping Utilities and Diagnostics Stop Ping Telnet client Telnet client screen appears Trace Route Secure Authentication Monitor Factory defaults Disconnect Telnet Console SessionTransferring conﬁguration and ﬁrmware ﬁles with Tftp Updating ﬁrmware Uploading conﬁguration ﬁles Downloading conﬁguration ﬁles Transferring conﬁguration and ﬁrmware ﬁles with Xmodem Do you want to send a saved configuration to your Netopia? Restarting the system Isdn Switch Loopback Test User’s Reference Guide If the loopback test fails Part III Appendixes User’s Reference Guide Appendix a Troubleshooting Conﬁguration problemsTroubleshooting A-1 SmartStart Troubleshooting Console connection problemsNetwork problems How to get support Power outagesTechnical support Before contacting Netopia FAX-Back Online product information Finding an Isdn service provider Appendix B Setting Up Telco ServicesObtaining an Isdn line Choosing an Isdn line Setup tips Physical Isdn lineIsdn Ordering Codes Outside North America only Switch protocol typeDirectory and Spid numbers U models only Circuit ID number U models only Long-distance Isdn calls North American models only Testing the Isdn line Completing the Isdn worksheet Isdn Telco Worksheet for North America Isdn Telco Worksheet for Outside North America User’s Reference Guide North American Telco Provisioning for Isdn Appendix C North American Telco Provisioning for Isdn User’s Reference Guide Finding an Internet service provider Appendix D Setting Up Internet ServicesSetting Up Internet Services D-1 Unique requirements Pricing and support Setting up a Netopia R3100 accountISP’s Point of presence Endorsements Deciding on an ISP account Local LAN IP address information to obtain Obtaining information from the ISPWith Network Address Translation Remote WAN IP address information to obtain Remote WAN IP address information to obtain Appendix E Understanding IP Addressing What is IP?About IP addressing Understanding IP Addressing E-1 Subnets and subnet masks Example Using subnets on a Class C IP internet Understanding IP Addressing E-3Subnet masks ISP Network Network conﬁguration Distributing IP addresses Example Working with a Class C subnetUnderstanding IP Addressing E-5 Background Technical note on subnet masking Conﬁguration Netopia R3100 Dhcp Server CharacteristicsUnderstanding IP Addressing E-7 Dhcp Address Serving Manually distributing IP addresses Using address servingTips and rules for distributing IP addresses MacIP Serving Dhcp example Understanding IP Addressing E-9 Internet Nested IP subnets Understanding IP Addressing E-11 Packet header types Broadcasts Network Conﬁguration Appendix F Understanding Netopia NAT BehaviorBackground Understanding Netopia NAT Behavior F-1 User’s Reference Guide Understanding Netopia NAT Behavior F-3 Router Netopia Router Netopia Understanding Netopia NAT Behavior F-5 Exported services Important notes Understanding Netopia NAT Behavior F-7 Summary Appendix G Understanding Frame Relay Virtual CircuitsUnderstanding Frame Relay G-1 Committed Information Rate CIR Committed Burst Size BcExcess Burst Size Be Local and Global DLCIs AddressingLocal Management Interface LMI Understanding Frame Relay G-3 Encapsulation and Fragmentation Network Protocol Addressing and Virtual InterfacesFrame Relay partial mesh support Understanding Frame Relay G-5 User’s Reference Guide Leased line events Appendix H Event HistoriesIsdn events Event Histories Isdn event cause codes Event Histories User’s Reference Guide Event Histories User’s Reference Guide Deﬁnitions Appendix Isdn Conﬁguration GuideAbout SPIDs Isdn Conﬁguration Guide Dynamic B-channel usage Example SPIDs Other incoming call restrictions User’s Reference Guide Binary Conversion Table J-1 Appendix J Binary Conversion Table Decimal Binary Further Reading K-1 Appendix K Further Reading User’s Reference Guide Further Reading K-3 User’s Reference Guide Appendix L Technical Specifications and Safety Information Technical Speciﬁcations and Safety Information L-1Pinouts for Auxiliary Port Modem Cable DSR Technical Speciﬁcations and Safety Information L-3 Power requirementsDescription Environment Regulatory notices Agency approvalsNorth America International Technical Speciﬁcations and Safety Information L-5 Important safety instructions Australian Safety InformationDeclaration for Canadian users Technical Speciﬁcations and Safety Information L-7 Telecommunication installation cautionsBattery User’s Reference Guide Glossary Glossary User’s Reference Guide Glossary User’s Reference Guide Glossary Remapping See network number remapping Glossary User’s Reference Guide Index-1 Index Index-2 ISP Index-3 NAT Index-4 Spid Index-5 Index-6 Limited Warranty and Limitation of Remedies Limited Warranty and Limitation of Remedies User’s Reference Guide