Why Choose a Next Generation Firewall


When CharlesDarwin published his theory of evolution, computers only existed in the realms of science fiction (if at all). As for the web, that would have been considered the stuff of unimagined dreams. Darwin’s theory, posited in “The Origin of the Species”, was of coursed aimed at the natural world.

However, it can also be applied to the world of computing and the Internet in particular. The web as we know understand it first came being in 1974 when Telenet become the world’s first ISP. Telenet brought something that had previously only been used by the US military – something referred to as ARPANET, into the public domain.

The Evolution of the World Wide Web

Since then hardware, software, and web itself have all moved on from those early days, turning itself into the connectivity wonder that has changed our lives, on both a personal and professional basis. The static website has become responsive and interactive. Social networking and blogging are the order of the day. What was termed as Web 1.0 has now become Web 2.0. The web has, in effect, evolved.

The Evolution of Malware and Cybercrime

But of course, evolution is not limited to any one species in the natural world, and this is also true of the cyber-world. With all of the good things and advantages that evolving web technology brings us, it also has a dark side – Malware was born and it too follows Mr Darwin’s theory. Cybercrime and invasive viruses have also evolved - becoming smarter and more insidious.  Anyone using the Internet for anything at all, (businesses in particular), should now be looking at installing the next generation Firewall, for it too has evolved. It has had to in order to keep pace with the ever increasing threat of cyber crime.

Firewalls and Anti Virus Protection

To the uninitiated there often seems to be no difference between a firewall and antivirus protection, but they are in fact two very different, discernible things. Antivirus protection is, in simple terms, a program that deals with a virus once it has been unknowingly downloaded. A firewall is designed to prevent malware or hackers from reaching your computer via the Internet in the first place. You can’t afford to be without either.

What a Firewall Does

In layman’s terms a firewall in effect puts a wall up between your computer and the Internet. What this does is that it hides ports on your computer from cyber criminals who are intent on hacking their way into your hard disk. They are intent on stealing things, such as your identity, your financial details, your medical records, and any other personal or business information they may be able to misuse. Worse, these days businesses of all sizes are targeted for their customer’s information and business intelligence.

What a Firewall Can’t Control

The problem is that a firewall is a two way street. As well as hiding your computer from hackers, it also has to allow you access to the web in the first place. When you then surf the web, browsing other websites and downloading programs and software, you run the risk of unwittingly downloading any viruses or malware that might be lurking either on the websites themselves, or within the downloads. You’re firewall has no control over what you do when you’re on the Internet. It’s the anti-virus program that does the mopping up if you’ve side stepped the firewall and downloaded anything malicious.

The Problems with Traditional Firewalls

Firewalls do a great and essential job. But because of the way that data has evolved in recent years, (back to Mr Darwin again), and the way that web protocols have changed and are being manipulated, traditional firewalls do not have the inbuilt intelligence to be able to discern one type of traffic from another, and then check out that the appropriate protocols are being used. They have therefore become far less effective at their job.

Next Generation Firewalls are More Intelligent

This is precisely why the next generation of firewalls have now evolved. They’ve become more intelligent, and are able to better discern the changing face of cybercrime.

Self Teaching Technology

Next generation firewall (NGFW) technology has been updated so that it can recognise the various applications it now has to deal with. It goes even further in as much as it is designed to be able to teach itself to recognise the validity of new release applications. It does this by building templates of data and then referring any new applications it comes across to these templates to ascertain that they are using the correct protocols. It is also able to detect any malware that has been hidden within.

Application Signature Checking

As well as being able to identify these new application packages and drill down deeper into the layers of data that they contain in search of malware, NGFWs can also compare the “signatures” of new packages. If the signature of a new package matches known, safe signatures they can be permitted; but if they don’t, a NGFW can then alert the user of any possible dangers.

Things to Watch Out for

When the escalated threat of malware importation became an issue, and the inadequacy of traditional firewalls was fully appreciated, the tech-bods put on their thinking caps and came up with something called UTM or Unified Threat Management software. A UTM package is something that can be “bolted on” in addition to a traditional firewall, to enhance security. But you must not assume that NGFW can replace UTM. This is because the operational aspects of NGFWs vary from manufacturer to manufacturer. Each package needs to be individually examined to see what it can and cannot do.

Maintaining Performance

In order to have SSL decryption at high speeds, it is necessary to bank various NGFWs; so says John Pirc the Vice President of NSS Labs. Their research has shown that when decryption is enabled on NGFWs marketed by the likes of Palo Alto, Cisco, and Juniper Networks, when installed on their own, there is a significant drop in performance.

It’s Your Call

In the workplace, it is normally the job of the IT department to evaluate the company’s firewall requirements according to the applications it needs and uses. They are responsible for choosing the appropriate NGFW and UTM if deemed necessary.

Quadratek provides a range of professional services designed to make the most of business IT demands. From structured cabling, network design and installation, we can ensure your infrastructure is secure and performs to its maximum potential.

Why not give us a call today on +44 (0)8450 740 530 or reach us through our contact page to see what we can do for your organisation.

Photo Credit: Ngọc Hà