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4 Open Source Web Application Firewall for Enhanced Security

Protect web applications with a firewall

Thousands of websites are hacked every day due to misconfigurations or weak code. A web application firewall (WAF) is one of the best ways to protect your website from online threats.

If your website is available on the Internet, you can use online tools to scan your website for vulnerabilities and understand how secure it is. Don’t worry if it’s an intranet website. You can use the open source Nikto web scanner.

Commercial WAFs can be expensive, so if you’re looking for a free solution to protect your website using a WAF, the following open source web application firewalls can help.

4 Open Source Web Application Firewall for Enhanced Security

mod security

TrustWave’s ModSecurity is one of the most popular web application firewalls and supports Apache HTTP, Microsoft IIS, and Nginx.

ModSecurity’s free rules can help you if you’re looking for protection for:

cross-site scripting
trojan horse
Information leak
SQL injection
Common web attacks
malicious activity

ModSecurity does not have a graphical interface. If you are looking for a graphical interface, consider using WAF-FLE . You can save, search, and view events in the console.

nakshi

NAXSI is Nginx Anti-XSS and SQL Injection. As you might expect, this is only for Nginx web servers and is primarily intended to protect against cross-site scripting and SQL injection attacks.

NAXSI only filters GET and PUT requests, and the default configuration acts as a DROP firewall by default, so you must add an ACCEPT rule to function properly.

web night

WebKnight WAF is for Microsoft IIS. This is an ISAPI filter that protects your web server by blocking malicious requests. WebKnight helps ensure the security of:

buffer overflow
Directory traversal
character code
SQL injection
block bad robots
hot link
Forcible
Even more…

The default configuration logs all blocked requests and can be customized based on your needs. WebKnight 3.0 adds an administrative web interface that allows you to customize rules and perform administrative tasks such as statistics.

shadow demon

The Shadow Daemon detects, records, and prevents web attacks by filtering requests with malicious parameters. This WAF comes with its own interface that allows you to perform administration and manage it. It supports PHP, Perl, and Python language frameworks.

The following attacks can be detected.

SQL injection
XML injection
code injection
command injection
XSS
backdoor access
Incorporating local/remote files

Open source is free, but you don’t get support, so you have to rely on expertise and community support. So, if you are looking for a commercial WAF, see below.