ppt on firewall

1. MUKAND LAL NATIONAL
COLLEGE
FIREWALL
SUBMITTED TO.
SUBMITTED BY.

2. COTENTS
• INTRODUCTION
• HARDWARE & SOFTWARE’S FIREWALL
• FIREWALL RULES
• WHAT CAN FIREWALL DO?
• WHAT CAN’T FIREWALL DO?
• TYPES OF FIREWALL
• CONCLUSION
• REFERENCES

3. INTRODUCTION
• Is hardware,software, or combination of both
• Used to prevent unauthorized programs or internet users from
accessing a private networks and or a single computer

4. HARDWARE VS. SOFTWARE’S FIREWALL
1. Hardware firewall
• Protect an entire network
• Implement on the router level
• Usually more experiensive,harder to configur
2. Software’s firewall
• Protect a single computer
• Usually less expensive, easier to configure

5. HOW DOE’S SOFTWARE FIREWALL WORKS
• Inspects each indivisual “packets” of data as it
arrives at either side of the firewall
• Determinies wether it should be allow to pass
though or if it should be blocked

6. 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 – ask the user wether or not the traffic is allowed to pass
through

7. WHAT CAN FIREWALL DO?
1. Focus for security decisions
• Stop hackers from accessing your computer
2. Can enforce security policy
• Protects your personal information
3. Limits your Exposure’s
• Block “pop up” ads and certain cookies
4. Can log internet activity efficiently
• Determinies which programe can access the internet

8. WHAT CAN’T FIREWALL DO?
• Can’t protect your against malicious insider
• Can’t protect your against connection that don’t go through it
• Can’t protect against completely new threats

9. TYPES OF FIREWALL
•Packet filtering firewall
•Application level Geteway
•Circuit level Getway

10. REFRENCES
Www.howstuffworks.com
Www.security.com
Www.firewall.com

11. CONCLUSION

12. Quarry??????