Firewall girija ppt
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A firewall protects networks and computers from unauthorized access. There are two main types - software firewalls that protect individual computers, and hardware firewalls that protect entire networks. A firewall works by inspecting all incoming and outgoing data packets and determining whether to allow or block them based on a set of rules. Firewalls can block hackers, enforce security policies to protect private information, and log internet activity. However, firewalls cannot protect against insider threats, connections not routed through the firewall, or completely new viruses.
Firewall girija ppt
- 1. firewall Girija sankar dash EmbEtics solutions
- 2. INTRODUCTION TYPES OF FIREWALL HOW DOES A FIREWALL WORK FIREWALL RULES OVERVIEW WHAT CAN A FIREWALL CAN/CANNOT DO ARCHITECTURES FOR FIREWALL CONCLUSION
- 3. INTRODUCTION • A firewall may be a hardware, software, or a combination of both. • It is used to prevent unauthorized programs or Internet users from accessing a private network and/or a single computer.
- 4. Types of firewall SOFTWARE FIREWALL HARDWARE FIREWALL Protect a single computer Protect an entire network Usually less expensive, easier to configure Usually more expensive, harder to configure Implemented on the router level Norton Internet Security Cisco PIX McAfee Internet Security NetScreen Outpost WatchGuard Ms. ISA Server Check Point
- 5. HOW DOES A FIREWALL WORK • Inbound to or outbound from your computer. • Inspects each “packet” of data that arrives at either side of the firewall. • Determines whether it should be allowed to pass through or if it should be blocked. sent sentreceived received packets packets
- 7. How a firewall works ? • Sniffing Mode – An attacker tries to compromise a service on the protected network. – The Firewall identifies the attempt. • The FIREWALL can now: • Alert the admin • Harden the firewall • Or reset a TCP/IP connection
- 9. FIREWALL RULES • Allow – traffic that flows automatically because it has been deemed • Block – traffic that is blocked because it has been deemed dangerous to your computer • Ask – asks the user whether or not the traffic is allowed to pass through
- 10. WHAT CAN A FIREWALL DO? • Focus for security decisions – Stop hackers from accessing our computer • Can enforce security policy – Protects our personal information • Limits your exposure – Blocks “pop up” ads and certain cookies • Can log Internet activity efficiently – Determines which programs can access the Internet
- 11. • Can't protect you against malicious insiders • Can't protect you against connections that don't go through it • Can't protect against completely new threats • Can't protect against viruses
- 12. FIREWALL CAN….. • Stop hackers from accessing your computer. • Protects your personal information. • Blocks “pop up” ads and certain cookies. • Determines which programs can access the Internet. • Block invalid packets.
- 13. FIREWALL CANNOT… • Cannot prevent e-mail viruses – Only an antivirus product with updated definitions can prevent e-mail viruses. • After setting it initially, you cannot forget about it – The firewall will require periodic updates to the rule sets and the software itself.
- 14. FIREWALL PROTECTS FROM • Remote login • SMTP session hijacking • Operating system bugs • Spam • E-mail bombs • Source routing
- 15. Architectures for Firewall • Single-Box Architecture
- 16. Architectures for Firewall • Screened Host Architecture
- 17. CONCLUSION • There are many vulnerabilities in the internet, so firewall protects us from these vulnerabilities. • Firewall protect private files from the outsiders access.
- 18. QUERIES???
- 19. THANKS VISIT US AT : www.embeticssolutions.com Ph: 9090761446 For complete ppt just mail me us at info@embeticssolutions.com If you find it helpful then like us on facebook : https://www.facebook.com/pages/Embetics- Solutions/318539438279689?ref=hl