CIS 1200 Chapter Notes - Chapter 9: Advance-Fee Scam, Network Address Translation, Packet Analyzer

• School: University of Guelph
• Department: Computing and Information Science
• Course: CIS 1200
• Professor: John Saville

Document Summary

Chapter 9: securing your system: protecting your digital data and devices. Firewalls: software programs or hardware devices designed to keep computers safe from hackers: close off logical ports and make your computer invisible. Personal firewall: a firewall specifically designed for home networks. Types of firewall: software: norton, mcafee, zonealarm, hardware: routers including firewall protection, software firewalls protect just as well as hardware firewalls do. Firewalls can be configured so that they filter out packets sent to specific logical ports in a process known as packet filtering. Ignore requests from the internet to access ports, a process known as logical port blocking. Firewalls use a process called network address translation (nat): assigns internal ip addresses on a network: your internal ip address is only accessible within the network so it is undetectable by hackers. Portable privacy devices provide an even higher level of surfing privacy: e. g.