Multi-national corporations are falling like flies to ransomware, which seems to be a more profitable career choice than going straight these days – but for each and every ransomware variant created, there are network security solutions, like the firewall, to stand it the way. From humble beginnings, the firewall has now morphed into a vast array of different functions and focuses, designed to provide the best protection with the least amount of confusion. Need to know more about this security solution? We thought you'd never ask.


What is a Network Firewall?

A network firewall will protect a computer or series of computers on a network from malicious websites, making them less vulnerable to open network ports and stopping attackers proactively. Network firewalls are found in businesses, homes, schools, and intranets, or the private networks within a corporation.


How does a Firewall Work?

A network firewall is a program or hardware device designed to filter incoming information from the internet before it enters your network or computer system. If any incoming information is flagged as suspicious by the firewall, it will be closely inspected and stopped from operating within the network.


Companies without network firewall security are more likely to have computers exposed to the internet. Hackers can easily enter and control unprotected systems like this, and any well-meaning employee who clicks a malicious link could potentially be a valuable point of entry or attack.


What are the main functions of a Network Firewall?

A firewall is primarily responsible for blocking unsolicited incoming network traffic, but it goes well beyond this. Because the firewall sits between your network and the internet, it can analyse all traffic entering or leaving the network and control it. You can also set rules within a firewall to allow and deny particular types of traffic. Corporate network firewalls analyse outgoing traffic for malware communication, monitor employee network use, and filter traffic.


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Different Types of Firewalls

  • Personal Firewall: A personal firewall is an application which controls network traffic in and out of a personal computer. It often works as an application layer firewall. A personal firewall is able to protect a single computer, on which it is installed.
  • Proxy Firewall: The Proxy Firewall acts as a proxy for users who want access to particular services, while shielding the services and users from direct communication and identification.
  • Next-Generation Firewall: A next-generation firewall combines the elements of a traditional firewall with filtering functions, like application firewall, using deep packet inspection and an intrusion prevention system.
  • Web Application Firewall: A web application firewall (WAF) is an application firewall that filters, monitors, and blocks HTTP traffic to and from the web. Inspection of HTTP traffic prevents attacks exploiting web application known vulnerabilities, like SQL injection , cross-site scripting (XSS), file inclusion, and improper system configuration.


Sangfor NGAF – Next Generation Application Firewall

Sangfor NGAF is the world's first AI-enabled and fully integrated NGFW (Next Generation Firewall) + WAF (Web Application Firewall) with an all-around protection. It is a truly secure, integrated and simplified firewall solution, providing a holistic overview of the organizational security network, with ease of management for administration, operation & maintenance.


Sangfor NGAF is an end-to-end comprehensive Enterprise Firewall Protection solution, specially formulated to be an easy-to-use converged security solution designed to protect users from internal, external, existing and future threats, and proactively updated regularly to keep your network safe.


FAQs - Frequently Asked Questions

Why do I need a network firewall?

A network firewall acts as a barrier between your computer and networks like the internet, protecting your network and information through effective management network traffic, blocking unsolicited incoming network traffic, and providing access to only legitimate network traffic.


How much is a network firewall?

This will depend greatly on how large your organization is, and how many users and devices you need to protect. If you need help determining how much network firewall security costs, contact Sangfor Technologies today.


Am I fully protected after installing network firewall?

A firewall can only provide so much protection. While a network firewall can go a long way toward securing your business, no security is 100% secure. Consider working with a firewall vendor (like Sangfor) who offers many correlated security products, designed to work flexibly with each other or with other vendors’ products.


Who is the best vendor of Network Security Firewall?

Sangfor Technologies of course. Visit online at, or email us directly at For more information on Sangfor NGAF security protections and solutions, visit Gartner’s Peer Review page, for more first-hand experience and advice about network firewall and next generation firewall from industry experts across the world.


Sangfor Technologies is an APAC-based, global leading vendor of IT infrastructure solutions specializing in Network Security and Cloud Computing. Visit us at to learn more about Sangfor’s Security solutions, and let Sangfor make your IT simpler, more secure and valuable.


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