4 Open Source Web Application Firewall for Better Security

Defend your internet functions with the firewall

Hundreds of internet sites are hacked day by day on account of misconfiguration or susceptible code. Internet Software Firewall (WAF) is likely one of the greatest methods to guard your web site from on-line threats.

In case your web site is out there on the web, you need to use on-line instruments to scan a web site for vulnerability to get an concept of ​​how safe your web site is. Don’t be concerned if it is an intranet web site; you need to use Nikto internet scanner open supply.

Industrial WAF will be costly, and in case you are searching for a free resolution to guard your web site with WAF, the next open-source Internet Software Firewall will be helpful.

Mod safety

TrustWave’s ModSecurity is likely one of the hottest internet software firewalls, supporting Apache HTTP, Microsoft IIS, and Nginx.

The free ModSecurity guidelines will be helpful should you’re searching for the following degree of safety.

  • Cross web site scripting
  • Computer virus
  • Leaked info
  • SQL injection
  • Widespread internet assaults
  • Malicious exercise

ModSecurity does not have a graphical interface, and if that is what you are searching for, think about using WAF-FLE. Means that you can retailer, search, and examine the occasion in a console.



NAXSI is Nginx Anti-XSS & SQL Injection. In order you may guess, that is just for the Nginx internet server and primarily to guard towards cross-site scripting and SQL injection assaults.

NAXSI solely filters GET and PUT requests, and the default configuration acts as a DROP default firewall, so it is advisable add the ACCEPT rule for it to work correctly.


WebKnight WAF is for Microsoft IIS. It’s an ISAPI filter that secures your internet server by blocking dangerous requests. WebKnight is helpful for securing the next.

  • Buffer overflow
  • Listing transverse
  • Character encoding
  • SQL injection
  • Block dangerous robots
  • Hotlinking
  • Brute pressure
  • And rather more…
web knight

In a default configuration, all blocked requests are logged and you’ll alter them in keeping with your wants. WebKnight 3.0 has an administrative internet interface the place you may customise the foundations and carry out administrative duties, together with statistics.

Shadow Daemon

Shadow Daemon detects, information and prevents internet assaults by filtering requests for malicious parameters. It comes with its personal interface the place you are able to do administration and handle this WAF. It helps the PHP, Perl and Python language framework.

It could detect the next assaults.

  • SQL injection
  • XML injection
  • Code Injection
  • Command injection
  • XSS
  • Entry to the again door
  • Native/distant file recording

Open supply is free, but when you do not get help, it’s a must to depend on your experience and neighborhood help. So in case you are searching for the business WAF then you may confer with the next.

  • Cloudflare (cloud-based)
  • Incapsula (cloud-based)
  • F5 ASM
  • TrustWave ModSecurity Industrial Guidelines
  • Stack path
  • SUCURI (cloud-based)

Hope this helps you with an concept about open supply internet software firewalls for the totally different platforms.

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