Because of that, the real-world answer is: “yes – you need a Web Application Firewall”. The answer can be “no”.Īs you might suspect, it’s impossible to meet the above circumstances in the real world. In that case, you are sure that there are no security gaps in the application and the infrastructure now and in the future, and there are no and will be no reported Common Vulnerabilities and Exposures for your framework and libraries in the future. ![]() Suppose your application is written in a truly secure way. Let’s answer the question from the section title: “Do you need a Web Application Firewall?”. The answer can be: “It depends”. Of course, an Web Application Firewall is not a silver bullet solution and it can’t mitigate all attack vectors, but definitely it can be very helpful. A very simple configuration can protect you against File inclusion, Cross Site Scripting, SQL injections and much more. ![]() Understanding HTTP in conjunction with other technologies like the Deep Packet Inspection means that a well-configured Web Application Firewall can help you protect your application against the most common web application attacks including the OWASP Top Ten attacks. The key differentiator of an Application Firewall is the fact that it works on OSI layer 7, which means it can understand certain applications protocols like FTP, DNS and HTTP – which is most useful from a web application perspective. In this article, we will focus on the third generation, the Application Firewall. ![]() They are often called first and second generation firewalls.Īs the Network Firewall can be still very useful, it’s not everything that Firewall technology has to offer. This kinds of Firewall offer OSI Layer 3 and layer 4 protection, which consists of checking the traffic source and destination IP addresses, protocol, source and destination ports. When we hear the term Firewall, we often think about the Standard/Network Firewall.
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