Network Security Complete Guide to Firewall - 2383 Words

CONTENTS Introduction 2 – 3 What Is a Firewall? 3 – 4 Types of Attack 4 - 5 Firewall Technologies 5 – 6 Choosing a Firewall 7 – 8 Conclusion 8 – 9 Abstract The world is surging towards a digital revolution where computer networks mediate every aspect of modern life. Not many years ago, most computers were carefully guarded mainframes, held tightly in the hands of skilled professionals. The systems and their guardians combined to provide ironclad protection of the organization’s all important data. Today the world is scary, anyone can get their hands on to the personal computers and even link into networks. Today the threat to the information on the network has grown to the†¦show more content†¦. Generally there are three types of attack that could potentially affect your business: †¢ Information theft: Stealing company confidential information, such as employee records, customer records, or company intellectual property †¢ Information sabotage: Changing information in an attempt to damage an individual or company’s reputation, such as changing employee medical or educational records or uploading derogatory content onto your Web site †¢ Denial of service (DoS): Bringing down your company’s network or servers so that legitimate users cannot access services, or so that normal company operations such as production are impeded Firewall Technologies The ICSA (International Computer Security Association) classifies firewalls into three categories: Packet Filter Firewall Every computer on a network has an address commonly referred to as an IP address. A packet filter firewall checks the address of incoming traffic and turns away anything that doesn’t match the list of trusted addresses. The packet filter firewall uses rules to deny access according to information located in each packet such as: the TCP/IP port number, source/destination IP address, or data type. Restrictions can be as tight or as loose as you want. An ordinary router on a network may be able to screen traffic by address, but hackers have a little trick called source IP spoofing that makes dataShow MoreRelatedDiscussion Board Essay678 Words   |  3 Pagesfollowing: Assuming the company had a firewall, why didnt it stop the intruders? Do you think an Intrusion Prevention System would have helped in this situation? Where and how was the company utilizing encryption? Do you think this gave them a false sense of security? Damp;A Laboratories had an external firewall in place to protect their information systems from unauthorized access. Protecting companies’ data in today’s world can be a challenging task. Firewalls should not  be only  the solutionRead MoreSecurity Practices Of Electronic Commerce Companies Should Follow1679 Words   |  7 Pagesinformation, social security numbers, addresses, and other personally identifiable information. In each case there are steps that can be taken to mitigate or prevent such damage from occurring. This paper attempts to provide a basic overview of security practices that electronic commerce companies should follow. The first category is building a secure network. There are necessary steps in how a company should approach access into their networks from the outside, from installation of a firewall system, toRead MoreItm 431 Module 1 How to Achieve Business Information Security in Cyberspace1353 Words   |  6 PagesIn the 21st century, a business without a network mirrors a city with no roads. Small businesses, in particular, arguably have a greater need for network connections and information systems. Small businesses rely on information systems for several things, to include their communication and customer database. Small businesses rely on network connectivity for communications. With the advancement in Voice Over Internet Protocol (VOIP), many businesses are using the internet to save on phone costsRead MoreDeveloping a Company Network Security Policy820 Words   |  3 Pageshaving the capabilities to access the company’s network both in and out of the office, increases the potential that information or the access to information may end up in the wrong hands. It is because of these threats that companies create and enforce network security policies. A network security policy is a document that states how company intends to protect the company’s physical and information technology assets. (Rouse, 2007) A security policy is intended to be a living document thatRead MoreChallenges Faced By Large And Small Enterprises1372 Words   |  6 Pagesbusiness infrastructure and IT infrastructure demands. While this kind of knowledge cannot prevent all attempts at system attack or network attack, which can empower network engineers to eliminate general problems, highly reduced potential damages and detects breaches very quickly. With the rise in increasing number and complexity of attacks, vigilant approaches to security in both large and small enterprises are a must. These days even a small sized business organizations as well as medium sized organizationsRead MoreNetwork Intrusion : The United States Government s Human Resources Department1561 Words   |  7 Pages Network intrusion may be a difficult task to complete with advances in network security, but with evolving technology and the availability of information on the Internet, network intrusion prevention may be the harder task. It was mentioned above that one must get to know his enemy before the attack; the same can be said if the roles are switched and one is on the defense. To obtain and maintain network security, motives for network intrusion must be analyzed. Take for example the attack thatRead MoreCertified Ethical Hacking1206 Words   |  5 PagesWorksheet Investigating and Responding to Security Incidents Course Name and Number: CSS280-1501A-01 Ethical Hacking Student Name: ***** ****** Instructor Name: ***** ****** Lab Due Date: 2/9/2015 Overview In this lab, you acted as a member of the incident response team who had been assigned an incident response in the form of a help desk trouble ticket. You followed the phases of a security incident response to investigate the eventRead MoreNetwork Access Policy : Endorsement Authorisation2077 Words   |  9 Pages NRT Network Access Policy Endorsement Authorisation Prepared by: Matthew Turner Endorsed by: Authorised by: Catherine Warren Issue record Issue Date Comments 1 22 September 2014 Initial Draft 0.2 1 Overview 3 2 Scope 3 3 Roles and Responsibilities 3 4 Policy 3 4.1 General Network Architecture 3 4.2 Access philosophy 3 4.3 Device Management 3 4.4 Device management Access 3 4.5 Network Design 3 4.6 Network/Traffic Security 3 4.7Read MoreFirewall Security2321 Words   |  10 PagesFIREWALL SECURITY This reports looks at what a firewall is, and how it works. It also looks at what security risks can be stopped by a firewall in a computer system. Most people think that a firewall is where all data traffic on the internet has to go through between networks, as shown in Figure 1.1 [pic] What is a firewall? In network security, firewall is considered a first line of defense in protecting private information. A firewall sits at the junction point, or gateway, between the twoRead MoreRed Hat Enterprise Linux 6 Security Guide50668 Words   |  203 PagesRed Hat Enterprise Linux 6 Security Guide 1 Red Hat Enterprise Linux 6 Security Guide A Guide to Securing Red Hat Enterprise Linux Edition 3 Red Hat Engineering Content Services 2 Legal Notice Legal Notice Copyright  © 2011 Red Hat, Inc. Based on the Fedora Security Guide (current version at http://docs.fedoraproject.org/enUS/Fedora/16/html/Security_Guide/index.html), written by Johnray Fuller, Eric Christensen, Adam Ligas, and other Fedora Project contributors. T he text