What is a Firewall and why is it important for network security?

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Dec 1, 2017

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In business today, information is more valuable than ever. Cybercrime is on the rise. Top companies of all sizes must protect their data. If you don’t, you risk competitors or thieves hacking your systems and getting access of customer data, banking information, and even proprietary information.

To prevent this, security is a top priority. A firewall is an important concept when it comes to computer security. If you aren’t aware of what a firewall is, don’t worry. This article will help you understand its components and why it matters:

What is a Firewall and why is it important for network security?

What is Firewall? It’s Origination

The term firewall was originally used to describe physical walls in buildings that were made of concrete or steel. Firewalls functioned to halt the fire from spreading past that room or apartment. It was also designed as a safety feature. It happens to make a great metaphor which is why the current definition still uses it today.

In technical terms, a firewall is a network security that looks at incoming and outgoing network traffic and prevents unauthorized access to maintain information security.

Within a computer system, there are internal networks and external networks such as the internet. The internal system is always trusted because only the user has access to this network. However, the internet can be malicious and be infected several types of malware and cyber hacking code.

Therefore, firewall technology features diverse types of methods to combat this. And the method for intrusion prevention used depends on the type of firewall in effect.

Layers of Security

There are various layers of a security system. First there is the physical layer. This refers to the actual hardware. When something is firewalled physically it means that there is no connection with the outside networks. While this method can be very effective, it is not as flexible and fast as other methods.

The second kind of firewall layer is the application type. This is at the software level in which bits of code determine what kind of information is passing through. It does this via something called packet filtering.

Protocols

When UDP or TCP, the protocols that send information over the internet, reach a computer, it looks at the information and decides what to do with it. These bits of information are called packets. This is when the firewall filters packets that are at the right stage of the connection.

A connection can either be starting, ending, or connected. Using something called stateful inspection, a firewall will determine if the information is appropriate for your computer or network to process.

However, a common attack is performed on computer networks through something called proxy servers. These servers are run through various cyber filters to make it difficult to track down where the attack is origination from.

Common Attack Vector

Using many of these, they will send packets of information to your computer and attempt to overwhelm the state management, which means that it cannot end the connection. It is stuck in an endless loop of connections and this is called a DDoS attack.

What is firewall protection

Here are the various types of firewalls:

• Proxy firewall
• Application Layer
• Generation Firewalls
• Software Firewall
• Based Firewalls
• Web application firewalls

In the instance above, a web application firewall is different than a physical or hardware firewall. Instead of waiting until the packets reach the machine, this kind of firewall attempts to cut it off at the source. Using certain sniffing techniques, it will detect bad traffic vs good traffic.

The reason that having a firewall at your web connection portal is so important is that UDP and TCP protocol are still transferred over HTTP. The packets can be disguised through something called a TLS handshake.

Essentially, when two computers, whether it is a server or laptop or desktop computer (even mobile phone) start communication, they must have a common language to agree upon and trust the other one. The way that many certificates online such as SSL accomplish this is by having a shared code.

Trust and Networks

Once this code is downloaded by both computers and the networks have detected the virtual handshake, it is time for the firewall to do its job and make sure that only the allowed information is passed through.

However, a firewall only listens to the packets it receives. If a packet was manipulated earlier on before it reached your core firewall, the internal software has no way of knowing. That is why the more firewalls you have further up in your network structure, the better off your business will do. A quality network engineer will be able to guide you on the best way to put this into place.

Finding the Right Professionals

The information above can be confusing. But you don’t need to worry about knowing it all. Instead, you should focus on how you are going to hire the right people in your business. And the best way to do that is through FieldEngineer.com

Field Engineer is a company that connects you with the best engineers all around the world. They have fast AI matching, so you can find the right person fast. It is free for businesses. It also allows you to manage your work flow and do background checks on the workers you want to hire. Don’t risk getting people who are not qualified for your business. Use FieldEngineer.com and enjoy the best talent by searching right from your phone, tablet, or computer. You can even use real time tracking to see what your engineers are doing on a moment by moment basis.

When it comes to technology and business, you want to make sure you have the right protection in place. The last thing you want is for important data to fall into the wrong hands. Long gone are the days where businesses could compete without protecting their technology infrastructure with firewalls. So be sure to get the right engineers working for you so you can enjoy success now and into the future.

Use FieldEngineer.com today to get quality engineers that you can trust with your business’ most important data!

Field Engineer is an online portal that is helping clients overcome the traditional hurdles of technical problems by helping them hire the right freelance network engineers. The site is at fieldengineer.com and offers numerous features and benefits. Businesses can use fast AI matching, so you can find the right person quickly. It also allows you to manage your work flow and do background checks on the workers you want to hire. Find the best talent by searching right from your phone, tablet, or computer. You can even use real time tracking to see what your engineers are doing on a moment by moment basis. Check out fieldengineer.com today to get quality engineers for your company to help you achieve your most important goals.

TAGS: firewall is a network security, firewall technology, proxy firewall, software firewall, web application firewalls, 0 Comments