What is a technical control that inspects a network incoming and outgoing traffic and either blocks or permits it according to rules the organization establishes?
A firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules. Show
Firewalls have been a first line of defense in network security for over 25 years. They establish a barrier between secured and controlled internal networks that can be trusted and untrusted outside networks, such as the Internet. A firewall can be hardware, software, software-as-a service (SaaS), public cloud, or private cloud (virtual). A firewall is a network security device, either hardware or software-based, which monitors all incoming and outgoing traffic and based on a defined set of security rules it accepts, rejects or drops that specific traffic. Accept : allow the traffic A firewall establishes a barrier between secured internal networks and outside untrusted network, such as the Internet. History and Need for Firewall Before Firewalls, network security was performed by Access Control Lists (ACLs) residing on routers. ACLs are rules that determine whether network access should be granted or denied to specific IP address. Connectivity to the Internet is no longer optional for organizations. However, accessing the Internet provides benefits to the organization; it also enables the outside world to interact with the internal network of the organization. This creates a threat to the organization. In order to secure the internal network from unauthorized traffic, we need a Firewall. How Firewall Works Firewall match the network traffic against the rule set defined in its table. Once the rule is matched, associate action is applied to the network traffic. For example, Rules are defined as any employee from HR department cannot access the data from code server and at the same time another rule is defined like system administrator can access the data from both HR and technical department. Rules can be defined on the firewall based
on the necessity and security policies of the organization. Default policy: It is very difficult to explicitly cover every possible rule on the firewall. For this reason, the firewall must always have a default policy. Default policy only consists of action
(accept, reject or drop). Generation of Firewall Firewalls can be categorized based on its generation.
Types of Firewall Firewalls are generally of two types: Host-based and Network-based.
Both types of firewall have their own advantages. References: What type of firewall inspects network traffic at a higher level in the OSI model than a traditional stateful packet inspection firewall does?A proxy firewall (aka application-level gateway) inspects packets at the application layer of the Open Systems Interconnection (OSI) reference model.
What lists out and rates the vulnerabilities of an organization?The risk matrix lists the vulnerabilities in a table, and managers rate the level of risk each one presents in areas such as confidentiality, company reputation, finances, system availability, and operations.
What feature does a firewall provide?A firewall can help protect your computer and data by managing your network traffic. It does this by blocking unsolicited and unwanted incoming network traffic. A firewall validates access by assessing this incoming traffic for anything malicious like hackers and malware that could infect your computer.
Is the art of manipulating people into breaking normal security procedures or divulging confidential information?What is social engineering? Social engineering is an attack vector that relies heavily on human interaction and often involves manipulating people into breaking normal security procedures and best practices to gain unauthorized access to systems, networks or physical locations or for financial gain.
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