Firewall Security - 2321 Words

FIREWALL 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 two networks, which are often a private network and a public network such as the Internet. (John V. Harrison, Hal Berghel, 2004, A Protocol Layer Survey of Network Security). It is a system designed to prevent certain access to or from another†¦show more content†¦The purpose of the firewall is to monitor the connection state. It then decides whether to permit or deny the data traffic. If the data passed is not matched to the state of conversation, or if the data is not in the state table, then this data is dropped. This is called ‘stateful inspection’. Access authentication provided by firewalls For authentication, firewalls use different types of mechanisms. 1 – Firewalls use usernames and passwords. When a connection receives authentication and authorisation once, then the user is not asked this information again. 2 – Certificates and public keys are also used for authorisation and authentication. 3 – Authentication can be handled through pre shared keys. These are better than certificates as they are less complex and easier to implement. The time it takes to authenticate is the same whether it is a certificate or a pre shared key. A pre shared host is issued with a predetermination key which is used for authentication. There is only one problem with a pre shared key: that it rarely changes. There are many organisations that use the same key to manage multiple remote hosts. This could be a security threat for the organisation. If a host firewall is not successful in its authentication, then the packet will be dropped. Role of a firewall as intercessor A firewall can act as an intercessor to help with the communication process between two hosts. This process is known as Proxy andShow MoreRelatedFirewall And The Security Levels1172 Words   |  5 Pagesserved by network security. The security levels can be classified into two they are low level security and high level security. Network security includes many components and firewall is one such component that protects a network from various threats. Everything in the existing world has got faults with it, similarly there are certain flaws in the firewall policies (Wool. A,2004). Due to these flaws in the policies associated for the firewall, it results in two scenarios of firewall failure. One isRead MoreFirewalls And Infrastructure Security1201 Words   |  5 PagesFirewalls and Infrastructure Security A firewall is a network device, hardware, software, or a combination of the two, whose purpose is to enforce a security policy across its connections. It is comparable to a wall that has a window where the wall serves to keep things out, except those permitted through the window. A security policy acts like the glass in the window; it permits some things to pass, light, while blocking others, air. The heart of a firewall is the security policy that it enforcesRead MoreSecurity Features Of A Firewall1707 Words   |  7 PagesThe first requirement is that the company must install and maintain a firewall that is properly configured to protect cardholders’ data. All computer systems shall be protected from unauthorized access by untrusted networks. 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Pathways Industries will provide trainingRead MoreFirewall Security Policy : Pathways Industries1367 Words   |  6 PagesFirewall Security Policy Pathways Industries Security Policy Pathways Industries defines its Security Policies based on the risk assessment performed for the security of its assets, partners, and clients to maintain the integrity and confidentiality of data. Compliance to these security policies by Pathways Industries personnel is mandatory. Any breech of these policies could lead to disciplinary measures up to and including separation from the company. Pathways Industries will provide trainingRead MoreComputer Network Security and Firewall Essay example2024 Words   |  9 PagesPrincipals of Information Security 4th Edition Questions Chapter 6 Questions 1. What is the typical relationship among the untrusted network, the firewall, and the trusted network? The relationship is that data is only limited to what firewalls allow via specific places called â€Å"ports†. There is the untrusted network on the outside, then the firewall which prevents unwanted or suspicious connections, and the trusted network is what lies within the bounds of the firewall. 2. What is the relationshipRead MoreTraditional Datacenter Security : Using Edge Firewall, Neutral Territories ( Dmz )814 Words   |  4 Pages7.7 Traditional Datacenter Security The saying datacenter has since a long time ago evoked pictures of huge server cultivates behind bolted entryways, where power and cooling were as imperative as system security to keep up dependability and accessibility of information. Edge security controls are the most widely recognized methodology taken for customary datacenter security. This methodology normally incorporates edge firewall, neutral territories (DMZ), system division, system interruptionRead MoreSecurity Policies And Firewalls Essay1432 Words   |  6 PagesSecurity Policies and Firewalls Thesis Statement: This paper will try to prove that the improper management of firewalls and the lack of strong security policies used in enterprises will cause data breaches from within the enterprises. To try and prove this, the paper will shed light on various data breach scams that occurred to companies such as Target, Home Depot, Ashley Madison and OPM. It will also try to create a model for ideal security policy making for companies in the e-commerce domainRead MoreA Brief Note On Firewalls And Network Security954 Words   |  4 PagesJoshua Theophilus Jacqueline Stanton ITSA 255-4121 23 November 2015 Firewalls and Network Security The cyberspace has become a major concern to all stakeholders in view of persistent threats and attacks to IT infrastructures around the globe. Individuals, corporate entities and even governments have become victims of anonymous attacks in one form or the other. As a result of these, security professionals have continued to design and implement policies that can help protect valuable assets and vitalRead MoreNetwork Security : Complete Guide to Firewall2383 Words   |  10 PagesCONTENTS 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