1. Firewalls

2. Intro to Firewalls Basically a firewall is a __________to keep destructive forces away from your ________ ____________.

3. What Firewall S/W Does ________the information coming through the Internet connection into your private network or computer system. If an incoming ______of information is flagged by filters, it is not allowed through.

4. Packet Filtering Packets (_____ ______ __ _____) are analyzed against a set of filters. Packets that make it through the filters are sent to the requesting system and all others are _________.

5. Firewall Configuration Firewalls are customizable. This means that you can add or remove filters based on several conditions.

6. IP Addresses Each machine on the internet is assigned a unique address called an _____________ Example: 216.27.61.137 If a certain IP address outside a company is reading too many files from a server, the firewall can block all traffic to or from that IP address.

7. Protocols Protocol is the pre-defined way that someone interacts with a service. The HTTP is the Web’s protocol. – IP: – FTP:

8. Words and Phrases The firewall will ______(search through) each ________of information for an exact match of the text listed in the filter. You can include as many words, phrases, variations as you need. You could instruct the firewall to block any packet with the word “X-rated” in it (but would not catch “X rated” – no hyphen).

9. Why Firewall? You still need to install ____-_____ ________. ______is going to get through as long as you accept e-mail. Businesses use them to fight _____ _______. It also stops anyone from ______ _____ a computer in your private network.