Author Topic: Firewall  (Read 107 times)

mbeena

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Firewall
« on: December 10, 2016, 06:27:51 AM »


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.

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, or both.

geethu

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Re: Firewall
« Reply #1 on: December 11, 2016, 04:00:09 AM »
Firewall is a network security system that monitors and controls the incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted, secure internal network and another outside network, such as the Internet, that is assumed not to be secure or trusted.Firewalls are often categorized as either network firewalls or host-based firewalls. Network firewalls filter traffic between two or more networks; they are either software appliances running on general purpose hardware, or hardware-based firewall computer appliances. Host-based firewalls provide a layer of software on one host that controls network traffic in and out of that single machine. Firewall appliances may also offer other functionality to the internal network they protect, such as acting as a DHCP or VPN server for that network.

hruthika

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Re: Firewall
« Reply #2 on: December 13, 2016, 02:54:02 AM »
a part of a computer system or network that is designed to block unauthorized access while permitting outward communication.

geethu

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Re: Firewall
« Reply #3 on: December 15, 2016, 03:10:31 AM »
A firewall is a boundary or a wall to keep intruders from attacking the network. The firewall is network device that is in between a private network and the internet. The firewall is configured to inspect network traffic that passes between the network and the internet. We can assign rules or protocols to the firewall to allow data to be shared. If the protocol isn't included in the approved list it would destroy or discard the packet of data and deny it from entering the network.
When a private network is connected to the internet it allows the people to access information from external sources .when the network is connected to the internet it also allow external uses to enter the private network and steal information from the network. To prevent unauthorized access organizations has firewalls to protect them.
There are mainly two types of firewalls. Software firewalls and hardware firewalls. A firewall provides configurable network access, authentication before accessing services and other services as well.

RH-Calvin

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Re: Firewall
« Reply #4 on: February 23, 2017, 09:19:19 AM »
A firewall is a network security 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. Network firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets.
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