Understanding the 'Firewall' features, before going deeper I will explain a few important points.
The firewall that is meant here is WAF (Web Application Firewall), which is a filter arrangement that functions to filter, monitor and block data originating from a client to a webserver or application.
The firewall feature of Killbot can block attacks that are included in the OWASP Top 10 list (, namely:
  • Hidden field manipulation
  • Cookie poisoning
  • Parameter tampering
  • Buffer overflow
  • Cross Site Scripting (XSS)
  • Backdoor or Debug options
  • Stealth commanding
  • Forced browsing
  • Third party misconfigurations
  • Known vulnerabilities, and many more such as SQL Injection, LFI, RFI, RCE, etc