Presentation on theme: "Chapter 11: Dial-Up Connectivity in Remote Access Designs"— Presentation transcript:
1 Chapter 11: Dial-Up Connectivity in Remote Access Designs Designs That Include Dial-Up Remote AccessEssential Dial-Up Remote Access Design ConceptsData Protection in Dial-Up Remote Access DesignsDial-Up Remote Access Design Optimization
2 Routing and Remote Access Introduction For remote access to private networking resources, you can useDial-upVirtual private network (VPN)Remote Authentication Dial-In User Service (RADIUS)Dial-up access lets you controlRemote access serversModem types and data ratesAccess phone numbersUser accountsAccessibility of private network resourcesDial-up access uses Point-to-Point Protocol (PPP).
3 Routing and Remote Access and Microsoft Windows 2000 A Windows 2000 featureRemote access clientRemote access server
5 Dial-Up Remote Access Design Review Amount of data transmittedNumber of locationsExisting modems and phone linesPlans for network growthNumber of simultaneous clientsOperating systems used by clientsProtocols used by clients
6 Dial-Up Remote Access Design Decisions Integration into existing networkHardware requirements for serversConfidential data protectionAvailability to remote access usersOptimization of network traffic
7 Dial-Up Remote Access Designs Use dial-up remote access to control all design aspects.Evaluate cost of ownership issues.Number of simultaneous remote usersNumber of locations requiring remote accessMonthly phone line costsInitial investment in modemsPhone line installationOngoing support costsConsider outsourcing to reduce costs.
8 Number of Remote Access Servers Determine the maximum number of users.Determine the sustained data rate.Perform a pilot test.Calculate the number of servers.
10 Single Location Configuration The hardware must support the maximum number of users.Advantages:Centralized administrationReduced administration costsDisadvantages:Increased network traffic on segmentsIncreased telephone chargesNo redundancy
11 Multiple Location Configuration The hardware must support the maximum number of users.Advantages:Reduced network traffic between segmentsReduced telephone chargesRedundancyDisadvantages:Decentralized administrationIncreased administration costs
12 Remote Access Client Support Communications portsTransport protocols determined byOperating systemApplicationsNetwork management toolsResource servers accessed by clientNetwork address assignmentManually allocateAutomatically assign using Dynamic Host Configuration Protocol (DHCP)
13 Preventing Unauthorized Access Restrict access to resources on the server.Restrict traffic on the server by using filters.Resources or serversNetwork segmentsTraffic types (for example, HTTP)Place servers on screened subnets.
16 Enhancing Remote Access Availability Include multiple dial-up remote access servers.Use backup phone numbers.Dedicate a computer to Routing and Remote Access.
17 Improving Remote Access Performance Upgrade server hardware.Intelligent communications adaptersFaster modemsServer processor and memoryDistribute clients across multiple servers.Dedicate a computer to Routing and Remote Access.
18 Chapter SummaryDial-up provides control over remote access but is more expensive.Services include remote access client and server.
19 Chapter Summary (Cont.) Your design shouldDetermine maximum number of users and data rateUse multiple serversEvaluate client needsProtect the private networkImprove availability and performance