Firewall- Basics

Firewall-Basics


In last few years, security threats to organisations have grown with lots of new techniques and that why we need defense mechanism more stronger than before.

Firewall is one of strong pillar of network defense mechanism.

Firewall - A Defense Mechanism

A firewall is a system designed to prevent unauthorized access to or from a private computer network. Firewalls are frequently used to prevent unauthorized users from accessing the important data. 

All messages entering or leaving an intranet pass through a firewall, which examines each message and blocks those that do not meet specific security criteria.

A firewall is necessary to protect an organization’s confidential information from those not authorized to access it and to protect against malicious users and incidents that originate outside its network. One of the most important elements of a firewall is its access control features, which distinguish between good and bad traffic. The various types of firewalls are :

• Packet Filter Firewall
• Statefull Firewall
• Application Intelligent 
• Application Proxy 

W'll see the explanation for these firewall types in next blog.  

In the real world, threats have evolved over the years, and firewalls have evolved to deal with them. While it is still possible to buy packet-only firewalls, they are not adequate for business use. Protection against blended threats is best provided by firewalls that combine all of the prior elements.

Traditional firewalls were not the best suited for current threats and cannot protect against a number of new threats.

At last only remember:-

"We have many Firewalls, Network security products and a lots of technological advancements to fight with threats, but the number one thing is our SECURITY AWARENESS PROGRAM"