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Web Application Firewall (WAF)

What is a Web Application Firewall?

A Web Application Firewall (WAF) protects your data from hackers as they try to exploit weaknesses in your application code.

These targeted attacks are disguised as genuine requests made to forms on your site - to a traditional firewall or Intrusion Detection System/Intrusion Prevention System they will appear authentic and so allow them to proceed; making them either unable to guard against these attacks or unable to offer comprehensive protection.

Once these requests get through to your application, the hacker can send a special request through your website form that will in turn release sensitive data stored on your database.

A WAF proactively protects the application layer against attempted fraud or data theft; blocking any suspicious activity. Inspecting every web request for cross-site scripting, SQL injection, path traversal and 400+ other types of attack, this protective layer ensures that your data remains secure.

Web Application Firewall

With a UKFast WAF you'll benefit from:

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Why UKFast?


Not only does your solution sit behind a Cisco ASA firewall as standard, our data centres are ISO 27001 certified, PCI-compliant and secured to UK government IL4 standards, which ensures your solution is protected by exceptional levels of security at all times. 

Expert Support

You'll soon see our expert  support engineers as an extension of your team. Supporting Windows, Ubuntu, CentOS, Debian and RedHat, our team are available 24/7/365 to answer questions or help resolve any issues, plus your call will be answered within 3 rings, guaranteed.

Always Available

With UKFast we guarantee 100% network uptime, ensuring your business is always online. And with Total Cover™ you can combine extras such as 15min support response,1 hour hardware replacement and proactive server monitoring to give you absolute peace of mind.

Technical Overview

Sitting directly on the application layer your WAF examines every HTTP request/conversation that comes through to your database server - and applies a set of bespoke rules set to filter out illegitimate traffic.

Custom rule sets are managed by security experts and exist for a wide range of applications. New rules can continually be applied to keep pace with new and emerging threats. Our WAF also proactively observes your genuine traffic, creating bespoke rules to ensure that any legitimate traffic is not blocked.

With no changes to your existing set up and an additional layer or protection, WAFs ensure that your site provides the upmost protection for your clients and also allows you to comply with PCI 6.6.

Our high performance WAF solution will prevent the following vulnerabilities:

  • Cross-site scripting (XSS)
  • Injection flaws (SQL injection)
  • Malicious file execution
  • Insecure direct object reference
  • Cross-site request forgery (CSRF)
  • OS command injections
  • Information leakage
  • Improper error handlingApplication denial of service
  • Broken authentication
  • Session management
  • Insecure cryptographic storage
  • Insecure communications
  • Failure to restrict URL access
  • Brute Force

"UKFast's security accreditations add serious weight to our proposals, and help us win business."


Speak to a Security Specialist

Call 0800 458 4545 or Get in Touch