Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 1 of 19
Session 11
Des...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 2 of 19
 Public Key I...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 3 of 19
 Digital cert...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 4 of 19
Objectives
 U...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 5 of 19
Types of softw...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 6 of 19
Updating a Net...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 7 of 19
Baseline Secur...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 8 of 19
Software Updat...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 9 of 19
Wireless Netwo...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 10 of 19
Wireless Topo...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 11 of 19
Threats to Wi...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 12 of 19
Securing Wire...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 13 of 19
Authenticatio...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 14 of 19
Using Encrypt...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 15 of 19
Administering...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 16 of 19
Remote Assist...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 17 of 19
Remote Deskto...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 18 of 19
Summary
 Ser...
Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 19 of 19
Summary Contd...
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Session 11 Tp 11

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Session 11 Tp 11

  1. 1. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 1 of 19 Session 11 Designing a Security Infrastructure
  2. 2. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 2 of 19  Public Key Infrastructure uses Authentication and Encryption  Keys refer to a string and its corresponding algorithm  Public Key authentication uses a public key to verify the authenticity of the sender  Digital certificates map the public key to other information about the owner of the key Review
  3. 3. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 3 of 19  Digital certificates are issued by a Certificate Authority  PKI components use the SSL and IPSec protocols  The CA has two root classes: enterprise and stand-alone  We can request certificates using the Certificate Request wizard or through the Certificate Services webpage Review Contd…
  4. 4. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 4 of 19 Objectives  Understand the types of software updates  Update a Network  Secure a Wireless Network  Administer a Network remotely
  5. 5. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 5 of 19 Types of software updates  Proper maintenance can help a network deliver trouble free performance  For this, it is necessary to update the computers with the latest enhancements and fixes for the software  Updates for Microsoft products come mainly in the form of service packs  Other updates include bug fixes and new drivers
  6. 6. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 6 of 19 Updating a Network  Network administrator must carry out updating on a timely basis  While updating Administrator must consider the following:  Keep a track of when the updates are released, and what each update does  Computers that need updating must be identified  Recommended to test the downloaded updates before installation  Process of updating computers in a large network must be automated
  7. 7. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 7 of 19 Baseline Security Analyzer  Graphical tool which scans Windows based computers for missing security patches or incorrect security settings  It is not a part of the Windows Server 2003, but can be downloaded from the Microsoft website
  8. 8. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 8 of 19 Software Update Services  Software Update Services (SUS) is a graphical tool that automates the deployment of updates on the network    SUS consists of:  Synchronization server  Intranet Windows Update server  Automatic updates
  9. 9. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 9 of 19 Wireless Network Standards  Wireless networks, or WLANs, enable connecting previously inaccessible areas  There are three standards developed by IEEE:  802.11b  802.11a  802.11g
  10. 10. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 10 of 19 Wireless Topologies  Topology refers to the way computers are connected using cables  Two types of topologies are:  Ad hoc topology: Connects two or more wireless devices to form an ad hoc network among themselves  Infrastructure topology: Enables interconnectivity between a traditional cabled LAN and its wireless counterpart
  11. 11. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 11 of 19 Threats to Wireless Networks  There are two main threats for a wireless network:  Unauthorized access: Equivalent of a telephone line that has been tapped into. All the transmissions between the computers on the network may become accessible to the unauthorized user.  Data Interception: Equivalent of stealing from a bank vault. Using suitable tools, a person may be able to capture data packets transmitted between the wireless devices and the access point.
  12. 12. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 12 of 19 Securing Wireless Networks  Group policies can be used to restrict access of user to the network  The main ways to secure a wireless network are  Authentication  Encryption
  13. 13. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 13 of 19 Authentication  User authentication can help prevent unauthorized access to the network  There are three systems used for authentication  Open System Authentication  Shared Key Authentication  IEEE 802.1x Authentication
  14. 14. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 14 of 19 Using Encryption  Encryption protects data packets from being read by unauthorized persons  Does not stop data packets from being intercepted
  15. 15. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 15 of 19 Administering the Network  Most Microsoft Management Console (MMC) snap-ins enable administrators to work on remote computers from their own computers  Tools to administer a network remotely include  Remote Assistance  Remote Desktop
  16. 16. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 16 of 19 Remote Assistance  Provides help from remote location  Enables the expert to control the computer of the user  Security features include  Invitations  Interactive connectivity  User Control  Limited permissions  Firewalls
  17. 17. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 17 of 19 Remote Desktop  Gives complete control over the remote computer  Can take place over an unmanned computer  Creates a separate session  Client needed to use Remote desktop is included along with Windows Server 2003
  18. 18. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 18 of 19 Summary  Service packs combine multiple fixes into one package  Hot fixes address only a certain issue  Baseline Security Analyzer lists the updates required by the system  Software Update Services installs new updates automatically over a network  There are three wireless networking standards: 802.11b, 802.11a and 802.11g  Topology is the way computers are connected to each other
  19. 19. Microsoft Windows Server 2003 Network Infrastructure – Planning and Maintenance/ Session 11 / Slide 19 of 19 Summary Contd…  Ad hoc topology can be formed when two wireless devices come within each others range  Infrastructure topology enables linking wireless and wired networks  There are three ways of authentication  Open system  Shared key  IEEE 802.1x  Networks can be administered remotely using Remote Assistance and Remote Desktop

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