FIREWALL

FIREWALL is quite easy to guess as the name implies fire of walls.Basically, a firewall is a barrier to keep destructive forces away from your property. In fact, that's why its called a firewall. Its job is similar to a physical firewall that keeps a fire from spreading from one area to the next.
A firewall is a part of a computer system or network that is designed to block unauthorized access while permitting authorized communications. It is a device or set of devices which is configured to permit or deny computer applications based upon a set of rules and other criteria.

A firewall is hardware, software,or a combination of both.

Hardware VS Software

• Hardware Firewalls :        

                     Protect an entire network
                     Implemented on the router level
                     Usually more expensive, harder to configure

•  Software Firewalls : 

                     Protect a single computer
                     Usually less expensive, easier to configure

There is a chronological history of firewalls or types of firewall techniques

1. Packet filter: Packet filtering inspects each packet passing through the network and accepts or rejects it based on user-defined rules. Although difficult to configure, it is fairly effective and mostly transparent to its users. It is susceptible to IP spoofing.
2. Application gateway: Applies security mechanisms to specific applications, such as FTP and Telnet servers. This is very effective, but can impose a performance degradation.
3. Circuit-level gateway: Applies security mechanisms when a TCP or UDP connection is established. Once the connection has been made, packets can flow between the hosts without further checking.
4. Proxy server: Intercepts all messages entering and leaving the network. The proxy server effectively hides the true network addresses.

If you are concerned about  privacy and safety of your computer and network firewall is the most important  part which cannot be neglected or left to mercy of others.

Personal firewalls software products can be purchased from web sites like :NORTON personal firewall


At end of this definition of firewall I have also written something which I felt every one of knows but then also we have been neglecting.Well I don't intend to vehement about this issue nor higgledy-piggledy ,I am a pacifist by nature.This post is just a way to bridge up  "You" with my idea of stronger,sanctified and secular India(its quite hard to describe in words...ineffable).Please read it and work/play with this idea well

                             Ethics is a science of morality.And morality is the conduct i.e what we do.So lets Do

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Proscribing  Transgression ...Inspiring Transparency

Folks if you all are vexed with the recent Buzz about " The new Indian pantheons Sri Lalit Modi and suave Sri Shashi Tharoor of IPL".Well to be honest (which indeed not in vogue ..just a wit) couldn't restrained myself from talking about the recent developments in my country.Even though this mayhem is not the part of the moot and I am not in the elitist society to speak about this but still it will require some diligent,contemplative thinking by we the people of India.So that when next time some glorified,extravagant events take place there is complete transparency and no signs of transgressions,debauchery.Lets commit our self to spread the idea of transparency ,integrity,authenticity and responsibility.Let this be our new credo.
    Be the change you want to see in the world
                M K Gandhi

No more advices as I hate being addressed as a sage who tells anecdotes or fables.Don't dare even to call me aka sage.