A firewall is simply a program or hardware device that filters the information coming through the Internet connection into your private network or computer system. A firewall trusts nobody unless it is told otherwise.It secures your computer from the outside world.
A firewall is simply a program or hardware device that filters the information coming through the Internet connection into your private network or computer system. A firewall trusts nobody unless it is told otherwise. It secures your computer from the outside world. It helps protect computers inside a large company. A firewall gives a company tremendous control over how people use the network. A firewall examines all traffic routed between the two networks to see if it meets certain criteria. If it does, it is routed between the networks, otherwise it is stopped. A firewall filters both inbound and outbound traffic. 3. My understanding of the situation is that, when the Windows firewall is off, every port on the computer (all 65535 of them) is fully open. This means that any application running on the computer can send any traffic from the computer through any port to any device on the network or the internet. If the firewall is off, every port is open and any application running on the computer can send and receive data through any port if it is designed to do so. Also any device that can connect to the computer (as a rule of thumb any device that can ping the computer) can send data through any port. In large corporations, if a firewall is not in place, thousands of computers could be vulnerable to malicious attacks. Firewalls should be placed at every connection to the internet and are also used to control outgoing web traffic as well in large organizations. Firewalls use several strategies to control traffic flowing in and out of networks. Firewalls can be configured to filter by several variables: IP address, domain name, protocol, port or even specific words or phrases. Though some operating systems come with a built-in firewall, internet routers also provide very affordable firewall protection when configured properly. Comments are closed. Firewalls are configured (in hardware, software, or both) with specific criteria to block or prevent unauthorized access to a network. They work as filters for your network traffic by blocking incoming packets of information that are seen as unsafe. Firewalls can be configured to filter by several variables: IP address, domain name, protocol, port or even specific words or phrases. Though some operating systems come with a built-in firewall, internet routers also provide very affordable firewall protection when configured properly. Comments are closed. In computing, a firewall is a network security system that monitors and controls the incoming and outgoing network traffic based on predetermined security rules. Firewalls are often categorized as either network firewalls or host-based firewalls. Network firewalls are a software appliance running on general purpose hardware or hardware-based firewall computer appliances that filter traffic between two or more networks. A firewall is a system designed to prevent unauthorized access to or from a private network. You can implement a firewall in either hardware or software form, or a combination of both. Firewalls prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets.  1 For home use, firewalls work much more simply. 2  The main goal of a personal firewall is to protect your personal computer and private network from malicious mischief. 3  Malware, malicious software, is the primary threat to your home computer. 4  Viruses are often the first type of malware that comes to mind. The need of Firewalls for Personal Use. 1  What Firewall Software Does. A firewall is simply a program or hardware device that filters the information coming through the Internet connection into your private network or computer system. If an incoming packet of information is flagged by the filters, it is not allowed through. Firewalls use one or more of three methods to control traffic flowing in and out of the network: 1  Packet filtering-Packets (small chunks of data) are analyzed against a set of filters. 2  Packets that make it through the filters are sent to the requesting system and all others are discarded. Firewalls are used to protect both home and corporate networks. A typical firewall program or hardware device filters all information coming through the Internet to your network or computer system. There are several types of firewall techniques that will prevent potentially harmful information from getting through: A firewall is a system designed to prevent unauthorized access to or from a private network. Firewalls can be implemented in both hardware and software, or a combination of both. At their most basic, firewalls work like a filter between your computer/network and the Internet. You can program what you want to get out and what you want to get in. Everything else is not allowed. There are several different methods firewalls use to filter out information, and some are used in combination. The need of Firewalls for Personal Use. 1  For home use, firewalls work much more simply. 2  The main goal of a personal firewall is to protect your personal computer and private network from malicious mischief.
http://www.cavsi.com/questionsanswers/what-does-a-firewall-do/ http://security.stackexchange.com/questions/13141/what-specifically-does-the-windows-firewall-do http://www.pctools.com/security-news/what-does-a-firewall-do/ http://www.pctools.com/security-news/what-does-a-firewall-do/ https://en.wikipedia.org/wiki/Firewall_(computing) https://kb.iu.edu/d/aoru https://www.comodo.com/resources/home/how-firewalls-work.php http://computer.howstuffworks.com/firewall1.htm http://www.webopedia.com/TERM/F/firewall.html https://www.comodo.com/resources/home/how-firewalls-work.php
what does a firewall do