Class 13

1
Class 13 14 Internetworking with Remote
Access
2
Objectives

• Understand Remote Access Under Windows XP
• Configure Various Remote Access Connection Types
  For A Windows XP Professional System
• Install Remote Access Hardware
• Understand Remote Access Security
• Understand The Internet Options Applet

3
Objectives

• Implement Internet Connection Sharing and the
  Internet Connection Firewall
• Understand the native Internet tools and
  utilities
• Troubleshoot remote access problems

4
Remote Access

• Components
• Clients
• Protocols
• WAN connectivity
• Security
• Server
• LAN protocols

5
PPP Multilink

• Increase overall throughput
• Combine bandwidth of two or more physical
  communication links
• Based on Internet Engineering Task Force (IETF)
  standard RFC 1717

6
VPN Protocols

• Point-to-Point Tunneling Protocol (PPTP)
• Supports multiprotocol VPNs
• Encrypted and secure
• Layer Two Tunneling Protocol (L2TP)
• Developed by Cisco Systems
• Encapsulates PPP frames for transport over
  various networks
• Used in combination with IPSec

7
Restartable File Copy

• Automatically retransmits incomplete file
  transfers
• Faster transmission of large files over
  lower-quality connections
• Reduced cost from avoiding retransmission of the
  whole file
• Reduced frustration from interrupted transfers

8
Idle Disconnect

• Shuts off remote access connection after
  specified period of inactivity
• Reduces the costs of remote access
• Frees up inactive remote access ports

9
Autodial and Logon Dial

• Automatically connect and retrieve files and
  applications stored on remote system

10
Client and Server Enhancements

• Number of client and server components
• Allow third-party vendors to develop remote
  access and dial-up networking applications

11
Look and Feel

• Undergone changes since Windows 2000
• Significantly different from similar utilities in
  Windows NT and Windows 95/98
• Integrated with networking components
• Network Connections
• Multipurpose management interface
• Both standard LAN networking links and remote
  access links are established and configured

12
Callback Security

• Control access to the system from specified phone
  numbers
• Calls may originate only from known phone number
  locations
• Remote access client can set the phone number
  dynamically

13
WAN Connectivity

• Create WAN by connecting existing LANs
• Remote access over
• Telephone
• ISDN
• Cable modems
• Campus networks
• Other communication lines
• Cost-effective solution if you have minimal to
  moderate network traffic between sites

14
Internet Network Access Protocols

• Supports all standard protocols for remote
  Internet access
• Remote access protocol dependent on the client
  and server OS and LAN protocols

15
PPP

• Current standard for remote access
• Microsoft recommends using PPP
• Flexible
• Industry standard

16
PPTP

• Allows you to establish a secure remote access
  pipeline over the Internet
• Tunnel IPX or TCP/IP traffic inside PPP packets
• Significant features
• Low transmission costs
• Hardware costs
• Administrative overhead
• Improved security

17
PPP-MP

• Combines two or more physical remote access links
  into one logical bundle with greater bandwidth
• Can combine analog and digital links
• All connections to be aggregated must be of the
  same technology type

18
SLIP

• One of the first protocols developed specifically
  for TCP/IP support over dial-up connections
• Included in Windows XP for backward-compatibility
• Does not support Dynamic Host Configuration
  Protocol (DHCP)

19
IPSec

• Security measure added to TCP/IP
• Negotiates secure encrypted communications link
• Uses public and private encryption key management
• Can be used over RAS/WAN link
• Can be used within LAN

20
Telephony Features

• TAPI
• Remote access Telephony API
• Supplies uniform way of accessing
• Fax
• Data
• Voice
• Part of Windows Open System Architecture (WOSA)

21
Remote Access Configuration

• Integrated default component of Windows XP
• Configured and managed from Network Connections
  window

22
Network Connections Window
23
Installing Remote Access Hardware

• Hardware must be installed before remote
  connection established
• Windows XP inspects hardware and attempts to
  identify any new devices
• Windows XP attempts to locate and install drivers
  for new device

24
Phone and Modem Options

• Primary Control Panel applet for managing remote
  access devices and operations
• Used to control
• Dialing rules
• Configure remote access devices
• Configure telephony driver properties

25
Connecting to the Internet

• Connect to the Internet Wizard
• Choose from a list of Internet service providers
  (ISPs)
• Set up my connection manually
• Use the CD I got from an ISP

26
Connection Status Dialog Box
27
Internet Connection Sharing

• Used to share single network connection with
  small group of networked computers
• Enabled on Advanced tab of connection objects
  Properties dialog box
• Incorporates
• Network Address Translation (NAT) function
• Dynamic Host Configuration Protocol (DHCP)
  address allocator
• Domain Name System (DNS) proxy

28
Internet Connection Firewall

• Security measure for protecting network
  connections from unwanted traffic
• Can set restrictions on traffic in and out of
  network to an external network or the Internet
• Much-needed feature for systems that employ
  shared broadband connections
• Stateful firewall
• Blocks most incoming traffic by default