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CONFIGURING TCP/IP ADDRESSING AND SECURITY

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chapter 11 configuring tcp/ip addressing and security – PowerPoint PPT presentation

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Title: CONFIGURING TCP/IP ADDRESSING AND SECURITY


1
CONFIGURING TCP/IP ADDRESSING AND SECURITY
  • Chapter 11

2
OVERVIEW
  • Understand IP addressing
  • Manage IP subnetting and subnet masks
  • Understand IP security terminology
  • Manage Internet security features of Windows XP
  • Configure and troubleshoot Windows Firewall

3
UNDERSTANDING BINARY NUMBERS
4
CONVERTING DECIMAL ADDRESSES TO BINARY
5
CONVERTING BINARY ADDRESSES TO DECIMAL
6
USING CALCULATOR TO CONVERT NUMBERS
7
SUBNET MASKS
8
PROBLEMS WITH CLASSFUL ADDRESSES
  • Wasted addresses
  • Shortage of address blocks
  • Excessive routing table entries

9
SUBNETTING A LARGE NETWORK
10
CLASSLESS INTERDOMAIN ROUTING (CIDR)
11
SUPERNETS
12
SECURING IP COMMUNICATIONS
  • Internet threats
  • Protective technologies
  • Configuring and managing Windows Firewall
  • Monitoring Internet communications security

13
INTERNET THREATS
  • Viruses (the oldest threat)
  • Worms (the most persistent threat)
  • Trojan horses
  • Spyware
  • Zombies
  • Direct hacking

14
VIRUSES
  • Take advantage of gullible users
  • Infect document, graphics, and executable files
  • Often include mass-mailing components
  • Can carry destructive payloads

15
WORMS
  • Self-replicating
  • Network-aware
  • Use bugs in programs or systems to spread
  • Can carry viruses or other payloads

16
TROJAN HORSES
  • Usually e-mailed or downloaded
  • Appear to be a useful program or game
  • Carry payload or back door application

17
SPYWARE
  • Has attributes of Trojan horses or worms
  • Spies on its victim
  • Might transmit marketing data or transmit
    personal data to the spyware author

18
ZOMBIES
  • Payload of worm or Trojan horse
  • Remotely controlled to attack network targets
  • Participate in large-scale assaults on public Web
    sites

19
DIRECT HACKING
  • Relatively low incidence
  • Hardest form of attack to defeat

20
PROTECTIVE TECHNOLOGIES
  • Security Center
  • Windows Firewall
  • Internet Connection Sharing (ICS)
  • Third-party utilities

21
SECURITY CENTER
22
FIREWALL TERMINOLOGY
  • Packet filtering
  • Stateful packet filtering
  • Exceptions (packet filter rules)
  • Allowed traffic
  • Rejected traffic
  • Logging

23
ENABLING WINDOWS FIREWALL
24
FIREWALL EXCEPTIONS
25
ADVANCED WINDOWS FIREWALL SETTINGS
26
MONITORING INTERNET SECURITY
  • Windows Firewall monitoring
  • Service logs
  • Event logs

27
WINDOWS FIREWALL ALERTS
28
WINDOWS FIREWALL LOGS
29
SERVER LOGS
30
SUMMARY
  • IP addresses are 32-bit binary addresses.
  • The network portion of IP addresses determines
    location.
  • CIDR allows creation of custom netblocks.
  • CIDR permits use of variable-length subnet masks.
  • Windows Firewall blocks unauthorized packets.
  • Windows Firewall exceptions allow specified
    traffic to pass through the firewall.
  • Alerts and logs warn of attempted attacks.
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