Ras

  • November 2019
  • PDF

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  • Words: 336
  • Pages: 6
1

How Dial-Up Network Access Works

Dial-up clients make a temporary connection to

a

remote

access

server

by

using

a

telecommunications provider Remote Access Server

Domain Controller

Dial-up Client

1

Dial-up Dial-up client client calls calls the the RA RA server server

3

RA RA server server authenticates authenticates and authorizes authorizes the the client

2

RA RA server answers answers the the call call

4

RA server server transfers transfers data data

2

Components of a Dial-Up Connection

Remote Remote Access Access Server Server

Domain Controller

LAN LAN and and Remote Remote Access Access Protocols Protocols

WAN WAN Options: Options: Telephone, Telephone, ISDN, ISDN, X.25, X.25, or ATM ATM

Dial-Up Dial-Up Client Client

Authentication Authentication DHCP Server

Address Address and and Name Name Server Allocation Allocation

3

How a VPN Connection Works

A VPN extends a private network across shared or public networks, such

as the

Internet VPN Server Domain Controller VPN Client

1

VPN client client calls calls the the VPN server server

3

VPN VPN server server authenticates authenticates and authorizes authorizes the client client

2

VPN server server answers answers the the call call

4

VPN server server transfers transfers data data

4

Components of a VPN Connection

VPN VPN Server Server

Domain Controller

VPN VPN Tunnel Tunnel Tunneling Protocols Protocols Tunneled Tunneled Data Data

VPN Client Client Authentication Authentication DHCP Server

Transit Transit Network Network

Address Address and and Name Name Server Server Allocation Allocation

5

Standard Authentication Protocols

Protocol

Security

Use when A client & server cannot negotiate using more secure validation

PAP

Low

SPAP

Medium

CHAP

High

You have clients not running Microsoft operating systems

MS-CHAP

High

You have clients running Windows NT Workstation 4.0 or later, or Microsoft Windows 95 or later

MS-CHAP v2 High

You have dial-up clients running Windows 2000 or later, or VPN clients running Windows NT 4.0 or Windows 98 or later

A Shiva client calls in to a server running Windows, or a Windows XP client calls in to a Shiva server

6

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