How to Legally Install and Use Burp Suite for Free on Kali Linux
Burp Suite is one of the most trusted and powerful tools in the cybersecurity domain, particularly for web application security testing. Developed by PortSwigger, it is widely used by penetration testers, ethical hackers, and security researchers to identify and exploit vulnerabilities in web applications. Its interface and modular tools allow testers to intercept, inspect, and manipulate HTTP/S traffic between a browser and web servers, enabling deep analysis of how an application communicates.
While Burp Suite has a professional edition with advanced automation capabilities, it also offers a community edition that is free to use legally. This free version provides a solid set of features for manual testing, making it ideal for cybersecurity learners and professionals who prefer hands-on analysis. The focus of this article series is on how to install and use this community edition legally on Kali Linux.
Kali Linux is a popular Debian-based operating system tailored for digital forensics and penetration testing. It comes pre-installed with many security tools and has robust community support. The combination of Kali Linux and Burp Suite Community Edition offers a comprehensive environment for anyone interested in ethical hacking or web application assessment.
Kali Linux provides a solid foundation for penetration testing due to its wide array of built-in tools and seamless support for scripting and automation. When paired with Burp Suite, it becomes a formidable setup for web security analysis. Burp Suite’s ability to intercept and manipulate HTTP requests allows ethical hackers to understand application logic and uncover flaws that might otherwise go unnoticed.
For example, during a web application assessment, a tester can use Burp Suite to observe all incoming and outgoing HTTP requests, identify hidden parameters, test input validation mechanisms, and look for signs of injection vulnerabilities. The availability of tools like Repeater, Decoder, and Comparer enhances the tester’s ability to perform deep manual testing.
Most importantly, using the community edition on Kali Linux is completely legal and aligns with the licensing policies of PortSwigger, provided it is used within the scope of educational, non-commercial, or personal development purposes.
Although the professional edition of Burp Suite offers additional capabilities such as automated scanning and advanced integrations, the community edition includes enough tools to perform effective manual security assessments. Key features include:
Proxy: This is the core component that allows interception of HTTP/S traffic between the browser and the target application. It helps in understanding how the application behaves and interacts with users.
Repeater: Enables manual modification and resubmission of HTTP requests. This tool is vital for testing different inputs, payloads, and understanding the response behavior of the application.
Intruder: While limited in speed and functionality in the free version, Intruder still allows for basic brute force and fuzzing attacks to discover hidden or vulnerable parameters.
Decoder: This helps testers encode or decode data, which is useful when dealing with encoded payloads such as Base64 or URL-encoded strings.
Comparer: Allows testers to compare different HTTP responses or other textual data to spot subtle differences that may indicate vulnerabilities.
Logger: Maintains a history of all HTTP requests and responses, providing an audit trail that can be referred to during analysis.
Using Burp Suite Community Edition is legal when it is downloaded from PortSwigger’s official website and used according to the licensing agreement. It is intended for non-commercial purposes, which iincludelearning, research, and personal skill development. Commercial use or integration into business processes requires a professional license.
It’s also important to remember that testing applications without explicit permission is illegal and unethical. Ethical hacking requires proper authorization from the application owner. Many organizations now offer bug bounty programs and test environments for researchers to practice on, such as those available from companies like HackerOne or Bugcrowd.
Understanding these boundaries is crucial for any cybersecurity professional. Staying within legal limits protects you from potential legal consequences and maintains the integrity of the cybersecurity profession.
Before installing Burp Suite, it’s important to ensure that your Kali Linux system is fully updated. This guarantees compatibility with recent packages and dependencies. Run the following commands:
Sudo apt update && sudo apt upgrade -y
After updating the system, check if Java is installed. Burp Suite requires a Java Runtime Environment (JRE) to function properly. You can install the default JRE on Kali Linux using:
Sudo apt install default-jre -y
Confirm that Java is installed by running:
java -version
This should return the current version of Java installed on your system. With Java ready, you can proceed to download the Burp Suite Community Edition.
To ensure a legal installation, always download Burp Suite from the official PortSwigger website. Here’s how to do it:
Save the downloaded .sh file to your preferred directory. This is a shell script that will launch the graphical installer.
Once the installer is downloaded, navigate to the directory where it is saved. You need to make the script executable:
chmod +x burpsuite_community_linux.sh
Then, execute the script:
./burpsuite_community_linux.sh
A graphical installer will appear. Follow the on-screen instructions to complete the installation. After the installation is finished, you can start Burp Suite from the application menu or by typing burpsuite in the terminal.
On first launch, Burp Suite will prompt you to:
You will then be brought into the main interface. From here, you can start using the proxy tool, launch manual requests through Repeater, or decode and analyze data.
To intercept web traffic, you need to configure your browser to route traffic through Burp Suite’s proxy listener. By default, Burp listens on 127.0.0.1:8080. Here’s how to configure it in Firefox:
Now, when you browse the internet, all traffic will be routed through Burp Suite.
To avoid security warnings and view encrypted HTTPS traffic, you must install Burp’s CA certificate into your browser. Here’s how:
With the certificate installed, Burp Suite can now decrypt HTTPS traffic, allowing for complete traffic inspection.
To verify everything is working:
If everything is configured correctly, Burp Suite will capture and display the HTTP requests. You can now begin inspecting and modifying requests to better understand the application behavior.
This setup provides a powerful and legally compliant platform for learning web application security. Burp Suite Community Edition on Kali Linux gives ethical hackers and penetration testers the necessary tools to perform detailed manual assessments. In the next part of this series, we will dive into practical usage examples and demonstrate how to identify common web vulnerabilities using Burp Suite.
Learning how to set up and legally use such tools is a vital step for anyone looking to enter or advance in the field of cybersecurity. The focus should always remain on ethical practices, continuous learning, and adhering to legal boundaries.
Once Burp Suite Community Edition is installed and configured on Kali Linux, the next step is learning how to use its tools effectively. The interface is organized into tabs, each corresponding to different modules that support various tasks in a penetration test. These modules include Proxy, Target, Repeater, Intruder, Decoder, Comparer, and Logger. Understanding the function of each module and how they interoperate is essential for any aspiring ethical hacker.
The default startup interface launches you into the Dashboard, which provides a quick view of current activity. While the professional edition offers background scanning and task automation here, the community edition primarily serves as a launch point to access other tabs. Navigation is straightforward, and the tabs work seamlessly together to support manual web security testing.
The first step in any web application assessment is understanding the application structure. The Target tab helps visualize the application’s site map as it is discovered during proxy interception or manual browsing.
As you browse the application through the configured browser, Burp Suite builds a hierarchical view of the application under the Target tab. This includes all directories, files, and parameters encountered. You can manually add or modify target scopes to define the specific areas you wish to test, reducing noise and focusing efforts on authorized zones.
By analyzing the structure and endpoints, testers gain insights into the application’s architecture and identify critical areas worth deeper inspection, such as login pages, admin interfaces, and API endpoints.
The Proxy tab is central to Burp Suite’s power. It allows testers to intercept traffic in real time and modify requests before they are sent to the server. This tab includes several sub-tabs: Intercept, HTTP history, WebSockets, and Options.
The Intercept sub-tab shows live HTTP requests, and you can pause or resume interception with a toggle button. When Intercept is on, each request pauses until you decide to forward or drop it. This feature is useful for modifying form data, changing headers, or inserting payloads before the request hits the server.
The HTTP history provides a complete log of all intercepted requests and responses, enabling backtracking and analysis. You can right-click on any item to send it to Repeater, Intruder, or other tools for further investigation.
Repeater allows testers to manually modify and resend HTTP requests. After sending a request from the Proxy or Target tab, it appears in the Repeat section, where you can tweak it and resend multiple times. Each request and response pair can be viewed and compared, making this tool ideal for analyzing how different inputs affect the server’s behavior.
For example, if you suspect that a parameter is vulnerable to SQL injection, you can send the request to Repeater and systematically test different payloads. The side-by-side view helps identify variations in responses that suggest a security flaw.
The repeater is especially useful in testing authentication mechanisms, manipulating session tokens, or exploring logic flaws without triggering alarms that automated scanners might raise.
Although limited in speed and advanced features in the community edition, the Intruder tab still provides a basic interface for conducting fuzzing, enumeration, and brute-force attacks.
You start by sending a request to Intruder, then mark specific parameters as attack positions. Intruder supports four attack types: Sniper, Battering Ram, Pitchfork, and Cluster Bomb. The Sniper mode is most suitable for basic testing, where one parameter is varied at a time.
Payloads can be customized from built-in lists or manually entered. For instance, you can use common usernames to brute force login functionality or try different content types to bypass input filters. Intruder results help identify which inputs produce different behavior or status codes, indicating potential security issues.
While slower than the professional version, even the community edition’s Intruder can be effective when used methodically for small-scale tests.
Web applications often encode data for transmission or security purposes. The Decoder tool helps analyze and manipulate such data. It supports a variety of encoding formats, including Base64, URL encoding, hexadecimal, and more.
Paste or type data into the Decoder input panel and apply different transformations to decode or encode the string. You can also apply smart decode to automatically identify the encoding type.
Decoder is especially useful when working with tokens, cookies, and user data that may be obfuscated. Understanding encoded values can sometimes reveal sensitive information or clues about how the application works internally.
The Comparer tool is used to identify differences between two pieces of data, whether they are HTTP responses, tokens, or other elements. You paste two items into the interface and perform either a word-by-word or byte-by-byte comparison.
This tool is particularly useful when analyzing the effect of different inputs. For example, after submitting two different login credentials, comparing the responses can highlight subtle clues indicating a failed or successful attempt.
It is also useful for analyzing session tokens and finding out whether they are predictable, which could indicate a security flaw in session management.
Logger keeps track of all HTTP and WebSocket messages in chronological order. This audit trail is useful for documentation and reporting, especially in environments where multiple tests are performed.
You can filter logs by method, response code, or domain to easily isolate important traffic. A logger is essential for reviewing the scope of your testing and ensuring you haven’t missed critical requests.
It also helps identify any anomalies or unexpected behavior during your interaction with the target application.
A typical workflow in Burp Suite involves:
This modular approach ensures that your testing remains organized, repeatable, and efficient. It also helps in maintaining ethical standards by staying focused on in-scope targets.
While Burp Suite Community Edition does not provide automated scanning, it is highly effective in manual detection of common web vulnerabilities. These include:
By combining features like Repeater and Intruder, testers can craft payloads and verify if the application is susceptible to these vulnerabilities.
For example, to test for XSS, you can insert scripts into input fields and use Repeater to observe whether the server reflects them in the response without proper sanitization. Similarly, testing authentication or session tokens using Intruder might reveal flaws in access control mechanisms.
In this part, we explored the practical usage of Burp Suite’s tools for manual web application testing. Each module serves a specific role in the testing process, and mastering them allows for thorough and structured assessments. The community edition, while lacking automation, still delivers robust capabilities suitable for ethical hackers and security learners.
In the next part of this series, we will delve into real-world testing scenarios. These examples will demonstrate how to identify specific vulnerabilities and simulate attacks safely within legal boundaries. Understanding the theoretical foundation is essential, but applying this knowledge in practice is where the real learning begins.
Before conducting any hands-on tests, it’s crucial to establish a safe environment to practice web security techniques. A legal and controlled setup protects you from unintentionally breaking laws or damaging real websites. Popular choices for such testing include local virtual machines running vulnerable applications such as DVWA (Damn Vulnerable Web Application), WebGoat, and Juice Shop.
Install one of these test environments on a local server or VM and configure your Kali Linux browser to proxy traffic through Burp Suite. These platforms are intentionally designed to host known vulnerabilities and simulate real-world web application flaws, making them ideal for learning and experimentation.
Damn Vulnerable Web Application is a PHP/MySQL-based application containing numerous common security issues. Start by navigating to the DVWA login page through your browser configured to proxy requests to Burp Suite. Intercept and analyze the login request using the Proxy tab.
You can begin testing for weaknesses in the authentication system by sending intercepted login requests to Repeater. Try entering common SQL injection payloads like ‘ OR 1=1– in the username or password fields. Observe the differences in server responses. If the login is successful without valid credentials, you’ve identified an authentication bypass vulnerability.
Burp Suite’s Repeater makes it easy to test variations of payloads and see how each change impacts server behavior. DVWA also contains XSS and CSRF vulnerabilities that can be tested using the same approach—intercept requests, modify input fields, and analyze the results.
OWASP Juice Shop is another excellent web application designed for testing security skills. It is more modern and simulates real-world frontend and backend vulnerabilities. Use Burp Suite to map the application, analyze requests, and search for weaknesses.
Start by logging in and exploring the application. Burp Suite will capture all HTTP and WebSocket traffic. Look for product search forms, contact pages, or feedback sections. These areas are often vulnerable to injection attacks.
You can send requests to Repeater to test for reflected XSS by injecting script tags into input fields and analyzing the response. If the script executes or appears unsanitized in the HTML output, it indicates a vulnerability.
Juice Shop also includes challenges related to insecure direct object references, broken access control, and improper session handling. Intruder can be used to brute-force object IDs or test for privilege escalation by modifying session tokens.
Web sessions are typically managed using cookies that store tokens identifying logged-in users. Insecure session management can allow attackers to hijack sessions or escalate privileges. Burp Suite allows for in-depth analysis and manipulation of session tokens.
Navigate to a user area, intercept a request, and inspect the Cookie header. Copy the session token and test its behavior in different user contexts using Repeater. Modify the token to guess or enumerate other valid session IDs. If successful, you might gain access to unauthorized data or functionality, indicating weak session security.
Comparing valid and invalid token responses using the Comparer tool can help identify differences in structure or predictability. This can reveal session fixation issues or other weaknesses that need mitigation.
XSS vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users. Burp Suite is highly effective in testing for both reflected and stored XSS.
Intercept form submissions or search queries, and modify input fields to include basic scripts like <script>alert(‘xss’)</script>. Forward the request and observe if the script executes or appears in the response.
For stored XSS, navigate to a page that displays user-submitted content, such as forums or comment sections. Inject your script and reload the page to verify if it persists. You can also test different encoding schemes using the Decoder tab to bypass basic filters.
Use the Repeater tab to modify HTML structure, test input sanitization, and analyze JavaScript behavior in response pages. XSS vulnerabilities are often found due to improper input validation or a lack of output encoding.
SQL injection vulnerabilities occur when user input is directly embedded in SQL queries. This can allow attackers to read, modify, or delete data in the database. Burp Suite can be used to test inputs suspected of being passed to a SQL backend.
Identify forms or URL parameters accepting user input. Use Repeater to insert typical SQL injection payloads such as ‘ OR ‘1’=’1 or admin’–. Look for differences in server response, error messages, or successful logins without valid credentials.
Some applications may suppress error messages. In these cases, use timing-based payloads such as 1 WAITFOR DELAY ‘:0:5– to detect if the query execution is delayed. Burp Suite Community Edition supports basic automation using Intruder to test a list of common payloads and analyze variations in response time or content.
Testing for SQL injection is crucial in identifying flaws that could lead to data breaches or unauthorized access. Always ensure your tests are limited to authorized systems and conducted in a controlled manner.
While the community edition of Intruder lacks high-speed performance, it is still useful for limited brute-force or enumeration tasks. For example, you can brute-force login credentials by marking the username and password fields as positions and using a list of common credentials.
Set the attack type to Sniper or Cluster Bomb depending on your needs. Upload payloads or enter them manually. Run the attack and monitor response codes or content length to identify successful attempts. Burp Suite will highlight differences, making it easier to spot valid combinations.
Intruder can also be used to enumerate directories or test access control by fuzzing URLs and headers. Although slower, strategic use of Intruder can still yield valuable results when testing smaller targets or applications with low interaction complexity.
Cross-Site Request Forgery exploits the trust a web application has in a user’s browser. Burp Suite helps detect and test for CSRF by analyzing how state-changing requests are handled.
Intercept a request that modifies data, such as changing a password or submitting a form. Examine whether the request includes a CSRF token. If no token is present or the token is predictable, you may be able to craft a malicious form that performs the same action.
Use the Repeater to resend the request without the CSRF token and observe if the server still processes it. If it does, the application is vulnerable. In secure applications, requests without valid CSRF tokens should be rejected.
Simulating attacks using Burp Suite helps you verify whether mitigation techniques such as token validation and SameSite cookie flags are properly implemented.
Performing web application tests, even in a learning environment, should always be governed by ethical principles. Only test applications for which you have explicit permission. Unauthorized access, data exposure, or system tampering—even without malicious intent—can result in legal consequences.
Use legal platforms and labs for your practice. Document your actions, respect privacy and confidentiality, and adhere to responsible disclosure if you find real vulnerabilities in systems you are authorized to test.
Burp Suite provides powerful capabilities, and with those comes responsibility. Ethical testing ensures you contribute positively to improving security without causing harm.
After simulating attacks, it’s important to document your results. Burp Suite’s Logger and HTTP history tabs provide detailed records of requests, responses, and payloads used. Export logs or take screenshots to include in your reports.
A good report should include:
This documentation is valuable for practice, learning, and use in real-world professional engagements. It helps reinforce your knowledge and demonstrates your skills to others in a structured format.
In this third part, we explored how to simulate real-world web attacks using Burp Suite on Kali Linux legally and ethically. From intercepting traffic to testing for common vulnerabilities like XSS, SQL injection, and CSRF, you now have practical techniques for safe testing.
In the final part of the series, we will cover advanced customization, extensions, automation, and how to prepare for certification and career readiness using Burp Suite as part of your toolkit. Let me know when you’re ready to continue.
Burp Suite’s modular design allows users to extend its functionality through community and professional extensions. The Extender tab provides access to the BApp Store, a repository of third-party tools that integrate seamlessly with the suite. These tools enhance automated testing, visualization, reporting, and vulnerability scanning.
To install extensions, open the Extender tab, navigate to the BApp Store, and browse available options. Extensions such as ActiveScan++ or Logger++ add deeper analysis features and enhanced logging. Though some extensions require the professional edition, many are compatible with the free version on Kali Linux.
You can also load your custom-written extensions in Java, Python (with Jython), or Ruby (with JRuby). This enables automation of repetitive tasks, integration with other tools, and customization of workflows. Mastering the use of Burp extensions dramatically increases efficiency and depth in testing.
The Burp Suite Professional edition provides a powerful API, but scripting is still possible with the community edition using external traffic interception tools and Burp’s built-in functionality. Combine it with shell scripting or Python scripts on Kali Linux to automate testing sequences.
You can write Python scripts to feed payloads to Repeater, analyze response patterns, and flag anomalies. This is particularly useful when testing large sets of parameters across multiple pages. Though this requires more setup than built-in API functions, it remains a valuable technique for resourceful users.
Burp’s command line options also allow automated startup configurations, making it easier to launch test environments with pre-set proxies or extension setups.
Within the Project Options tab, Burp Suite includes session handling rules and macros that automate certain tasks. This is useful when testing applications that require login or multi-step navigation.
For example, you can record a login sequence as a macro and configure Burp to replay it whenever a session timeout is detected. This ensures uninterrupted scanning and testing. Combine it with session handling rules to maintain authenticated states during passive or active tests.
While this feature is more powerful in the professional edition, the foundational skills can still be learned using the community edition. Understanding session automation prepares users for more sophisticated workflows as they advance.
Burp Suite includes both passive and active scanning methods. While the community edition lacks automatic scanning, manual techniques can still be employed effectively. Active probing using Repeater and Intruder can uncover hidden vulnerabilities missed by basic inspection.
Focus on crafting custom payloads for headers, cookies, and hidden fields. Use Repeater to inject malformed inputs, fuzz uncommon HTTP methods, or explore RESTful endpoints beyond the visible user interface.
Using Intruder’s grep function to search for known error strings, redirects, or behavioral changes is another powerful technique. This allows manual yet methodical testing across endpoints.
Tools like Burp Collaborator are exclusive to the professional version, but understanding its concept—detecting out-of-band vulnerabilities—is essential. You can simulate parts of this functionality using external DNS loggers and callback servers in your lab setup.
Practicing with Burp Suite and documenting your findings is the foundation of building a credible portfolio. Create detailed write-ups of test cases, include screenshots, describe steps taken, and explain results.
Host these reports in a version-controlled repository or blog. Focus on clarity, structure, and professionalism. Use vulnerable applications like DVWA and Juice Shop to demonstrate various testing categories.
This documentation becomes evidence of hands-on experience and problem-solving skills. It’s invaluable when applying for internships, jobs, or freelance engagements. Showcasing your ability to identify and explain vulnerabilities is more compelling than listing tools on a resume.
While Burp Suite is just one component of broader cybersecurity knowledge, it plays a key role in penetration testing certifications. Understanding how to manually test web applications aligns with the learning objectives of many entry- and mid-level certs.
Certifications often test your ability to recognize and exploit common vulnerabilities, a skill honed through tools like Burp Suite. Learn to use it alongside techniques like traffic analysis, scripting, and OS-level tools native to Kali Linux.
Building comfort with Burp Suite prepares you for hands-on labs and exam scenarios. Practice under timed conditions to replicate real testing environments. Combine your efforts with a study plan that includes reading, labs, and scenario-based challenges.
Burp Suite works best when combined with other testing tools. Use Nmap or Nikto for preliminary scanning, then import results to Burp for deeper testing. Intercept and modify traffic from mobile devices by redirecting them through Burp’s proxy.
Combining tools builds testing pipelines that mimic professional workflows. This integration is essential when testing APIs, mobile applications, or complex multi-tier environments. Configure Kali Linux’s iptables or use tools like mitmproxy for traffic redirection.
Your test rig becomes a comprehensive suite capable of handling everything from reconnaissance to post-exploitation analysis. Mastery of this toolkit translates directly into real-world value.
Capture the Flag (CTF) challenges and bug bounty platforms offer practical scenarios to hone your skills. They simulate real-world applications and encourage creative problem-solving.
Use Burp Suite to intercept challenge traffic, analyze application behavior, and craft custom payloads. Look for logic flaws, bypass conditions, and misconfigured headers. Many successful bug bounty hunters rely heavily on Burp for initial analysis and final exploit development.
CTFs help reinforce techniques like parameter tampering, authentication bypass, and insecure direct object references. They also encourage documentation and time management—key skills for real-life engagements.
Mastering these habits will greatly increase your speed and efficiency when working with Burp Suite in any environment.
Web application security evolves constantly. Burp Suite evolves with it, and so should your skills. Keep up with changes in HTTP standards, new encoding schemes, and modern authentication mechanisms.
Subscribe to changelogs, follow communities, and experiment with new features. Try building your extension once you’re comfortable with the API. Stay curious and adaptive.
Your understanding of Burp Suite will serve as a base for learning other professional-grade tools. The fundamentals of web security remain consistent, even as specific attack vectors change. A strong foundation now means agility later.
This four-part series walked you through installing, configuring, using, and mastering Burp Suite legally and effectively on Kali Linux. From initial setup to simulating attacks and customizing workflows, each step contributes to building a strong, ethical, and practical security testing skillset.
Continue exploring, practicing, and documenting your progress. Whether you’re preparing for a career in cybersecurity or expanding your capabilities, Burp Suite remains one of the most powerful allies in your toolkit.
Success comes from practice, persistence, and ethical responsibility. Let Burp Suite guide your journey deeper into the world of application security.