Presentation is loading. Please wait.

Presentation is loading. Please wait.

Ch 21. Computer Network Firewall. What is firewall? Hardware and Software Installed in a computer to protect only one computer.

Published byTheodore Cooper Modified over 8 years ago

Similar presentations

Presentation on theme: "Ch 21. Computer Network Firewall. What is firewall? Hardware and Software Installed in a computer to protect only one computer."— Presentation transcript:

1 Ch 21. Computer Network Firewall

2 What is firewall? Hardware and Software Installed in a computer to protect only one computer

3 What is firewall? Hardware and Software Standalone firewall protect the whole LAN

4 What is firewall? Allow passing through Deny passing through Function of a firewall

5 How a firewall works? Data Packets Computer File

6 How a firewall works? Inside a Data Packet 192.168.0.1 http youtube.com 00010010101…. Source Address Target Address Protocol Data…

7 How a firewall works? Packet Filtering

8 Rules in a Firewall RuleSource addressTarget addressProtocolAction 1 All except 192.168.1.0 AllFTPDeny 2192.168.1.0www.youtube.comHTTPAllow 3Allwww.facebook.comHTTPDeny

Download ppt "Ch 21. Computer Network Firewall. What is firewall? Hardware and Software Installed in a computer to protect only one computer."

Similar presentations

Hub A hub is a device that connects PCs together All hubs Contain multiple access ports the hub simply forwards the packets to all the other devices connected.

Hub A hub is a device that connects PCs together All hubs Contain multiple access ports the hub simply forwards the packets to all the other devices connected.
Network Security. Reasons to attack Steal information Modify information Deny service (DoS)

Network Security. Reasons to attack Steal information Modify information Deny service (DoS)
1 Pertemuan 05 Firewall Matakuliah: H0451/Praktikum Jaringan Komputer Tahun: 2006 Versi: 1/0.

1 Pertemuan 05 Firewall Matakuliah: H0451/Praktikum Jaringan Komputer Tahun: 2006 Versi: 1/0.
Firewalls Screen packets coming into the Privet Networks from external, Untrusted Networks (Internet) Ingress Packet Filtering  Firewall examine incoming.

Firewalls Screen packets coming into the Privet Networks from external, Untrusted Networks (Internet) Ingress Packet Filtering  Firewall examine incoming.
FIREWALLS & NETWORK SECURITY with Intrusion Detection and VPNs, 2 nd ed. 6 Packet Filtering By Whitman, Mattord, & Austin© 2008 Course Technology.

FIREWALLS & NETWORK SECURITY with Intrusion Detection and VPNs, 2 nd ed. 6 Packet Filtering By Whitman, Mattord, & Austin© 2008 Course Technology.
Internet Architecture Two computers, anywhere in the world, following certain hardware, software, protocol specifications, can communicate, reliably even.

Internet Architecture Two computers, anywhere in the world, following certain hardware, software, protocol specifications, can communicate, reliably even.
Networking Components Manuel Palos. HUBS Hubs are inexpensive devices that connect multiple devices t0 a network. Hubs merely pass along network data.

Networking Components Manuel Palos. HUBS Hubs are inexpensive devices that connect multiple devices t0 a network. Hubs merely pass along network data.
Firewalls Presented by: Natalie LeCompte, Kara Oliver, Emily Taylor, and Joe Thrower.

Firewalls Presented by: Natalie LeCompte, Kara Oliver, Emily Taylor, and Joe Thrower.
Firewalls Marin Stamov. Introduction Technological barrier designed to prevent unauthorized or unwanted communications between computer networks or hosts.

Firewalls Marin Stamov. Introduction Technological barrier designed to prevent unauthorized or unwanted communications between computer networks or hosts.
NETWORKING COMPONENTS Zach Avis. Hub A hub is a low cost way to connect two computers. A hub can also act as a repeater. When a signal comes from one.

NETWORKING COMPONENTS Zach Avis. Hub A hub is a low cost way to connect two computers. A hub can also act as a repeater. When a signal comes from one.
Basic Networking Components

Basic Networking Components
And how they are used. Hubs send data to all of the devices that are plugged into them. They have no ability to send packets to the correct ports. Cost~$35.

And how they are used. Hubs send data to all of the devices that are plugged into them. They have no ability to send packets to the correct ports. Cost~$35.
Networking Components By: Michael J. Hardrick. HUB  A low cost device that sends data from one computer to all others usually operating on Layer 1 of.

Networking Components By: Michael J. Hardrick. HUB  A low cost device that sends data from one computer to all others usually operating on Layer 1 of.
Packet Filtering. 2 Objectives Describe packets and packet filtering Explain the approaches to packet filtering Recommend specific filtering rules.

Packet Filtering. 2 Objectives Describe packets and packet filtering Explain the approaches to packet filtering Recommend specific filtering rules.
Unit 4, Lesson 11 How Data Travels the Internet

Unit 4, Lesson 11 How Data Travels the Internet
Chapter 6: Packet Filtering

Chapter 6: Packet Filtering
By : Himanshu Mishra Nimish Agarwal CPSC 624.  A system designed to prevent unauthorized access to or from a private network.  It must have at least.

By : Himanshu Mishra Nimish Agarwal CPSC 624.  A system designed to prevent unauthorized access to or from a private network.  It must have at least.
FIREWALLS Vivek Srinivasan. Contents Introduction Need for firewalls Different types of firewalls Conclusion.

FIREWALLS Vivek Srinivasan. Contents Introduction Need for firewalls Different types of firewalls Conclusion.
Introduction to Firewalls TEC 236. What is a Firewall? A firewall is hardware, software, or a combination of both that is used to prevent unauthorized.

Introduction to Firewalls TEC 236. What is a Firewall? A firewall is hardware, software, or a combination of both that is used to prevent unauthorized.
Protecting Internet Communications: Encryption  Encryption: Process of transforming plain text or data into cipher text that cannot be read by anyone.

Protecting Internet Communications: Encryption  Encryption: Process of transforming plain text or data into cipher text that cannot be read by anyone.

Similar presentations

Ads by Google