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USRobotics NETServer/16, NETServer/8 manual LAN-to-LAN Routing Case Study

Models: NETServer/16 NETServer/8

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LAN-to-LAN Routing Case Study

The following example shows routing between two NETServers in order to demonstrate how each end of the connection would be configured.

This case study assumes the following:

∙both NETServers (NETServerA and NETServerB) are configured with the correct IPX network number, IPX Frame Type, IP address and Netmask.

∙NETServerA’s Sysname is NSA. NETServerB’s Sysname is NSB.

∙both NETServers are set to the factory defaults on all other settings

∙NETServer A is on LAN1, the main data center of a com- pany, and NETServer B is on LAN2, a branch office.

∙if traffic on the connection becomes too great, NETServerB will open a second line

∙if there is no traffic on the connection for 30 minutes, NETServer B disconnects

Case Study - LAN to LAN Routing Between Two NETServers

LAN-to-LAN Routing 6-25

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USRobotics NETServer/16, NETServer/8 manual LAN-to-LAN Routing Case Study

Contents

NETServer/8 NETServer/16 Page Table of Contents Network Dial-in Access Reference Section Administrative ToolsLimited Warranty Warranty and ServiceService and Support Technical SupportVii Viii We welcome your suggestions for better documentationOverview Chapter OverviewWhat’s New with Release 3.1? Additional Software EnhancementsAccounting Server Support Netmask TableIP Address Spoofing Accounting ServersIcmp Message Logging Multiple Name ServersRandomized Hosts Radius Accounting and ANI/DNISNew Modem Port Features NETServer Overview IP Modem Sharing How do I get there from here? Security Administrative UtilitiesChapter Basic Installation System Administrator RequirementsBasic Installation TCP/IP Reference Material Accessing the Command Line Getting Started First step for IPX or IP/IPX networks Getting the LAN port up and runningBasic Installation IP Configuration You must also set the Broadcast Address. Type the following Ethernet802.3 ethernet802.2 ethernet802.2II ethernetII IPX ConfigurationFinal Steps Recommended Global Configuration PasswordIP and IPX Default Gateways To set the IP gateway, type the following Save your work Name ServiceBasic Installation Chapter Configuration Overview How to Setup ApplicationsConfiguration Overview Application Section Where do I go from here?Separate a parameter and its value by a space Command LineCommands are not case sensitive You can abbreviate commandsSave your changes Reset any ports you have changedReboot when necessary How to log out of the command lineQuick Command Overview Overview of configurable tables Global ConfigurationHosts Table Netmasks Table Initialization Script ConfigurationNet0 LAN Port Configuration Location TablePacket Filter Table Port Type Port ConfigurationRoutes Table Snmp ConfigurationUser Table Configuration Overview Chapter IP Terminal Server Setup Terminal or Workstation SetupIP Terminal Server Setup NETServer Terminal Server Setup Overview Port Default Global DefaultUser Table Set the port’s security Pass-Thru Login Terminal Server Detailed SetupConfiguring a Port Set the port type to User LoginCreate default user settings for the port Port Default Login Service Optional Friendly Stuff Save sport # Configure the user Adding a Remote User to the User TableAdd the user to the User Table Login Service Configure for dialback use? Example IP Terminal Server Case StudiesNETServer will use ports 6, 7, and 8 for this application Save your work and reset all the ports Example IP Terminal Server Setup Chapter Network Dial In Access Dial-in User SetupNetwork Dial In Access Prework NETServer Setup for Network Dial-In OverviewConfiguration NETServer Dial-In Detailed Setup Dialback Users on this Port? Save the changes to flash memory Normal or dialback user? Create a new userAdd configuration information for the user This is the user’s IP subnet mask. Use the following command Option can be any one of the following Configure the ports IP Remote Access Case StudyCreate a user table entry for the dialback user Create user table entries for the dial in usersSave your work and reset the ports Connecting to the NETServer IPX Remote Access Create User Table entries for the dial in users Setup for NETServer Routing Overview Chapter LAN-to-LAN RoutingLAN-to-LAN Routing IPX routing LAN-to-LAN Routing NETServer Routing An Introduction to NETServer RoutingLAN-to-LAN Routing How RIP Dynamically Builds the Routing Table Static vs. Dynamic RoutesEstablishing Connections to Remote Gateways How Packets are RoutedRouting Procedure PAP Password Authentication Protocol PAP/CHAP AuthenticationChap Setup for the NETServer Chap Challenge Example Configuring the Port LAN-to-LAN Routing Detailed SetupCreating a Dial-Out Group Adding a Remote Device to the Location Table Create a new location table entrySet Required Location Parameters This is the remote device’s IP address Set location location name netmask netmask Dial Group Number Multiple lines for a single connection Maximum Ports Create a Dial Script Set location Chicago script 1 atds slot#\r Connect Adding the Remote Device to the User Table Create a User Table EntryTell the NETServer about the Remote Device Set user user name protocol ppp slip Set netuser user name compression on off LAN-to-LAN Routing Case Study Add netuser nsb password xyzabc Setting Up NETServer aSetting Up NETServer B Now, save your work and reset the ports Testing the Connection What If I Don’t Want to Use Chap Authentication? Connecting to NETServer a from NETServer BAssign the modem a TCP port number Configure the port as a host deviceChapter Talking to the Modems TCP/IP Modem SharingTurn modem control carrier detect off Save your work and reset the portImplementing Security with Host Device Dial Out Configuring modems as Unix pseudo TTYs Talking to the Modems Assign Text to an Initialization Script Modem Initialization ScriptsHow To Add a New Initialization ScriptUse an Existing Initialization Script Delete an Initialization ScriptDisplaying an Initialization Script Initialization Script Example Default initialization stringSending AT commands to the modems Talking to the Modems Chapter Packet Filters Packet FiltersPacket Filters Packet Filters and the NETServer Types of FiltersInformation Sources Input filters vs. Output filtersAdding Packet Filters Input filters vs. Output filters Filter Rule Format Rule TypeName Rule Number Permit or DenyOptions TCP/IP packet filtering Destination Address TCP and UDP parameters TCP UDP Standard Port NumbersFTP Packet Filtering Filtering RIP messagesClient opens a control channel FTP Example Type Description Filtering Icmp packetsIPX Rules IPX packet filteringDsthost SAP Rule Options Delete a Packet Filter Editing Packet FiltersEdit a Packet Filter Delete a Packet Filter RuleView the Packet Filter Table View a Packet FilterRoot Access Chapter Administrative ToolsConfiguring the !root account Changing the command promptTelnet Access Port Manually Connecting to a Remote Site Dial CommandNslogin, Rlogin and Telnet Commands Viewing Debug messages Troubleshooting CommandsTurn off the output console by typing the following Ifconfig MTU Ping Ptrace Version TracerouteShow Show commandShow flash Show arpShow netconns Show memoryShow netstat Show sessions Show sapAdministrative Tools Chapter Command Reference Global ConfigurationCommand Reference View the Global Configuration Table Get helpSave Changes Connect Message Default HostGlobal user parameters Assigned AddressRandomize Hosts Global routing parameters Default GatewaysIP Address Spoofing Default RouteSystem Name NetBIOS Packet PropagationPAP Authentication Proxy ARPName Service ServiceServer name Domain name DNS Cache Reset Time-outRadius Secret Radius securityPrimary Radius Server Alternate Radius ServerSyslog Accounting Radius AccountingIcmp Logging View the Hosts Table Hosts TableAdd a Host Delete a HostChange a Location’s Parameters Bring Up the List of CommandsLocation Table Add a Location to the Location TableSave Location Table Changes View the Location TableView a Particular Location Connection Type Location Table ParametersIP Address NetmaskIPX Network Protocol RoutingCompression Maximum Ports Dial GroupHigh Water Mark Idle Time-outPPP Async Map MTUOutput Filter Input FilterDial Script Send Reply Reset the Network Interface Card LAN Port Net0 ConfigurationView LAN Port Configuration LAN Port ParametersEthernet Status Interface Address Configured Ethernet MediaBroadcast Address IPX Frame Type Set net0 ifilter filter name View the netmask table Netmask TableAdd a netmask Delete a netmaskChange a Port’s Parameters Save Port ConfigurationView the Ports Table To view all of the S-ports, use the following commandIdle Port is idle View an Individual Port User Login Determining a Port’s TypeHost Device Device Service Network Login Message Dial In Port ParametersLine Hangup Security Pass-Thru Login Login PromptUser Login Port Parameters Dialback DelayAutolog Name Host Login Service Terminal Type IPX Network Number Hardwired Port ParametersSet s0 netmask netmask NETServer sends RIP information across Stopbits Serial Communications ParametersPort Speed DatabitsModem Control ParityFlow Control Host OverrideRoutes Table Configuration Add a Route to the Routes TableChange a Route’s Information Delete a Routes Table Entry Save Routes Table ChangesView the IP Routes Table Flag Parameter Viewing the IPX Routes TableIP Parameters IPX Parameters Enabling/Disabling Snmp Snmp TableDelete Snmp Hosts Save the Snmp Table ChangesWrite Community Name Snmp Table ParametersView Snmp Table Read Community NameWrite Hosts Read HostsAdd a User to the User Table User TableView the User Table Change a User’s ParametersDelete a User Save User Table ChangesLogin User Parameters Access FilterDialback Number Set user name service rlogin telnet netdata portmux Command Reference Dialback Network User ParametersIPX connections require the PPP protocol NETServer sends RIP information to the dial Set user filter name ofilter filter name Command Reference 16 port NETServer Hardware Appendix a Technical SpecificationsTypical Input Power Power RequirementsMaximum Output Power Maximum Input PowerExternal Serial Port Console Technical Specifications A-310Base-T Ethernet Network Interface CardIsolated GND SignalTechnical Specifications A-5 10Base-2 BNCTechnical Specifications Token Ring⎯STP Connector Technical Specifications A-7Token Ring Network Interface Card Token Ring⎯UTP Connector Routing Support NETServer Firmware SpecificationsAdministration Technical Specifications A-9PPP Specific Features Industry Standards SupportClient Dial-up Support Slip and PPP Client Software Support Technical Specifications A-11Technical Specifications Addressing Schemes B-1 Appendix B Addressing SchemesIPX Addressing Basics IP Addressing BasicsAddress Classes SubnettingAddressing Schemes Addressing Schemes B-3 Mask Binary Subnets HostsReserved Addresses Addressing Schemes B-5 Supernetting Advanced TCP/IPCidr Each Supernet is treated as a single entity Addressing Schemes B-7 Step two Select a range of addresses for each supernet Addressing Schemes B-9 Supernetting and the NETServer Software Download C-1 SDL Using a Direct Connection to a PCWhy Perform an SDL Software Download? Appendix C Software DownloadStarting SDL Make Backup Copies of the NETServer FirmwareSoftware Installation Loading the Software Download SDL ProgramSoftware Download C-3 SDL Command SyntaxFilename Prefixes Optional -d ParameterSoftware Download C-5 Entering SDL ModeUpgrading NETServer Firmware From the Windows Management SoftwareSoftware Download C-7 Upgrading the Modem FirmwareFor the Isdn NETServer, the file names are Software Download C-9 Error MessagesPC SDL program detected unknown command line argu- ments Software Download C-11 Invalid Control Word Software Download C-13 File you are trying to download is not a NETServer file Boot Process D-1 Appendix D Boot ProcessBoot Process Using Syslog Appendix E Syslog AccountingSyslog Accounting E-1 Syslog Accounting Syslog System MessagesSpotting Unused Ports Syslog System Message FormatSyslog Accounting E-3 Syslog System Message ExamplesSomeone has logged in as !root on port S16 Syslog Accounting E-5 Syslog Accounting Obtaining Radius Appendix FSecurity a Centrally Managed User Table Authentication Items Setting Up Radius User Table EntriesResponse Items Radius F-5 Framed-Netmask Radius F-7 User Types Radius F-9 Making NETServer talk to a Radius security server Chap authentication using Radius Acct-Status-Type Acct-Delay-TimeRadius Accounting Radius accounting fieldsAccounting Examples Acct-AuthenticAcct-Session-Time Radius Index Alphabetical IndexIndex Icmp MTU NIC PPP SAP Slip Index Index