1. Network security Process in which digital information are protected

2. What is network security ? -Controlling access to network -Securing any network interference -Securing possible entry point of attack -Stop unauthorized user (“intruders”)from accessing any part of system -Detect whether or not someone attempted to break into your network system

3. What is at risk Confidentiality-information should be available only to those who rightfully have access to it Integrity-information should be modified only by those who are authorized to do so Availability-information should be accessible to those who need it when they need it

4. How can we secure network There is no full way to secure networks but you could make hard for someone to penetrate the network by installing firewall

5. What is a Firewall -System or group of systems that enforce an access control policy between two network -Firewall is piece of software or hardware that filters all traffic network between computer,home network, or office network and internet -System that protects a network and the machines from various type of attacks

6. Primary goal of firewall Implement a desired security policy Controlling and blocking unwanted incoming traffic Block network traffic based on content

7. What can’t firewall prevent Inside attack (internal network snooping or intrusion attempts from within) Social engineering (attack in which one obtain information pretending to be coworker or just someone who doing routing checks Poorly trained firewall administer

8. Firewall If you have more than one firewall installed on your computer, you should not have both firewalls turned on at the same time. Two firewalls turned on at the same time can cause compatibility problems that result in some programs not working correctly.

9. Hardware firewall Description Want the utmost in network security for your office? netgear’s FVS318 ProSafe VPN Firewall provides business-class protection at a NAT router price. broadband connection at the same time. shopping.nowthor.com/zyxel- zywallfirewalls.html

10. Free firewall Comodo Free Firewall Version 2.4 http://www.personalfirewall.comodo.com/ R-Firewall http://www.r-firewall.com/ http://www.r-firewall.com/

11. To open Windows Firewall 1.Click Start and then click Control Panel. 2.In the control panel, click Windows Security Center. 3.Click Windows Firewall.

12. Windows firewall Dose ->Help block computer viruses and worms Ask for your permission to block or unblock certain connection requests. Create a record (a security log), if you want one Does not->Detect or disable computer viruses and worms if they are already on your computer Stop you from opening e-mail with dangerous attachments. Block spam or unsolicited e-mail from appearing in your inbox.