
Introduction to ethical hacking
What is Ethical Hacking and what is it used for ?
Ethical hacking involves a hacker agreeing with an organization or individual who authorizes the hacker to levy cyber attacks on a system or network to expose potential vulnerabilities. An ethical hacker is also sometimes referred to as a white hat hacker. Many depend on ethical hackers to identify weaknesses in their networks, endpoints, devices, or applications. The hacker informs their client as to when they will be attacking the system, as well as the scope of the attack. An ethical hacker operates within the confines of their agreement with their client. They cannot work to discover vulnerabilities and then demand payment to fix them. This is what gray hat hackers do. Ethical hackers are also different from black hat hackers, who hack to harm others or benefit themselves without permission.
What is penetration testing?
Penetration testing, or pen testing, is the process of attacking an enterprise's network to find any vulnerabilities that could be present to be patched. Ethical hackers and security experts carry out these tests to find any weak spots in a system’s security before hackers with malicious intent find them and exploit them. Someone who has no previous knowledge of the system's security usually performs these tests, making it easier to find vulnerabilities that the development team may have overlooked. You can perform penetration testing using manual or automated technologies to compromise servers, web applications, wireless networks, network devices, mobile devices, and other exposure points.
Setting up the laboratory in ethical hacking
Virtualisation Platforms, VMWare, VirtualBox for ethical hackers
Lab Architecture Diagram for ethical hackers
What skills do Ethical Hackers need to know?
In addition to proficiency in basic computer skills and use of the command line, ethical hackers must also develop technical skills related to programming, database management systems (DBMS), use of the Linux operating system (OS), cryptography, creation and management of web applications and computer networks like DHCP, NAT, and Subnetting. Becoming an ethical hacker involves learning at least one programming language and having a working knowledge of other common languages like Python, SQL, C++, and C. Ethical hackers must have strong problem-solving skills and the ability to think critically to come up with and test new solutions for securing systems. Ethical hackers should also understand how to use reverse engineering to uncover specifications and check a system for vulnerabilities by analyzing its code.
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Is Ethical Hacking Legal?
Yes, ethical hacking is legal because the hacker has full, expressed permission to test the vulnerabilities of a system. An ethical hacker operates within constraints stipulated by the person or organization for which they work, and this agreement makes for a legal arrangement. An ethical hacker is like someone who handles quality control for a car manufacturer. They may have to try to break certain components of the vehicle such as the windshield, suspension system, transmission, or engine to see where they are weak or how they can improve them. With ethical hacking, the hacker is trying to “break” the system to ascertain how it can be less vulnerable to cyberattacks. However, if an ethical hacker attacks an area of a network or computer without getting expressed permission from the owner, they could be considered a gray hat hacker, violating ethical hacking principles.
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What is the Certified Ethical Hacker ( CEH ) Certification Exam?
The Certified Ethical Hacker (CEH) certification exam supports and tests the knowledge of auditors, security officers, site administrators, security professionals, and anyone else who wants to ensure a network is safe against cybercriminals. With the CEH credential, you can design and govern the minimum standards necessary for credentialing information that security professionals need to engage in ethical hacking. You can also make it known to the public if someone who has earned their CEH credentials has met or exceeded the minimum standards. You are also empowered to reinforce the usefulness and self-regulated nature of ethical hacking. The CEH exam doesn’t cater to specific security hardware or software vendors, such as Fortinet, Avira, Kaspersky, Cisco, or others, making it a vendor-neutral program.
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What is the Certified Information Security Manager ( CISM ) exam?
Passing the Certified Information Security Manager (CISM) exam indicates that the credentialed individual is an expert in the governance of information security, developing security programs and managing them, as well as managing incidents and risk. For someone to be considered “certified,” they must have passed the exam within the last five years, as well as work full-time in a related career, such as information security and IT administration. The exam tests individuals’ knowledge regarding the risks facing different systems, how to develop programs to assess and mitigate these risks, and how to ensure an organization's information systems conform to internal and regulatory policies. The exam also assesses how a person can use tools to help an organization recover from a successful attack.
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What are the different types of hackers?
The different types of hackers include white hat hackers who are ethical hackers and are authorized to hack systems, black hat hackers who are cybercriminals, and grey hat hackers, who fall in-between and may not damage your system but hack for personal gain. There are also red hat hackers who attack black hat hackers directly. Some call new hackers green hat hackers. These people aspire to be full-blown, respected hackers. State-sponsored hackers work for countries and hacktivists and use hacking to support or promote a philosophy. Sometimes a hacker can act as a whistleblower, hacking their own organization in order to expose hidden practices. There are also script kiddies and blue hat hackers. A script kiddie tries to impress their friends by launching scripts and download tools to take down websites and networks. When a script kiddie gets angry at…
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Many hackers use the Linux operating system (OS) because Linux is a free and open-source OS, meaning that anyone can modify it. It’s easy to access and customize all parts of Linux, which allows a hacker more control over manipulating the OS. Linux also features a well-integrated command-line interface, giving users a more precise level of control than many other systems offer. While Linux is considered more secure than many other systems, some hackers can modify existing Linux security distributions to use them as hacking software. Most ethical hackers prefer Linux because it's considered more secure than other operating systems and does not generally require the use of third-party antivirus software. Ethical hackers must be well-versed in Linux to identify loopholes and combat malicious hackers, as it’s one of the most popular systems for web servers.
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Downloading OWASPBWA, Install OWASPBWA in Ethical Hacking
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Whether you want to get your first job in IT security, become a white hat hacker, or prepare to check the security of your own home network, Udemy offers practical and accessible ethical hacking courses to help keep your networks safe from cybercriminals
Preparation of the virtual lab for pentesting Metasploitable 2 with Kali
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Wireshark is a packet sniffer and analysis tool. It captures network traffic on the local network and stores that data for offline analysis. Wireshark captures network traffic from Ethernet, Bluetooth, Wireless (IEEE. 802.11), Token Ring, Frame Relay connections, and more.
Following Protocol Streams, To filter to a particular stream
Wireshark is a GUI network protocol analyzer. It lets you interactively browse packet data from a live network or from a previously saved capture file. Wireshark's native capture file format is pcapng format, or pcap which is also the format used by tcpdump and various other tools.
tcpdump is a network packet sniffer tool in Linux.
tcpdump is a network packet sniffer tool in Linux.
This tutorial focuses on DDOS (Distributed Denial of Service) attacks using the hping3 tool.
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In this video, we will begin to set an answer to the question of what is Nmap, what we can do, how we can access nmap documents, how it works in cyber security course and cyber security advanced .
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In computer networking, a port is a communication endpoint. At the software level, within an operating system, a port is a logical construct that identifies a specific process or a type of network service.
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A port scan is a method for determining which ports on a network are open. As ports on a computer are the place where information is sent and received, port scanning is analogous to knocking on doors to see if someone is home.
A stealth scan is a type of network scanning technique that allows an attacker to remain undetected as it never completes the TCP connection. This type of scan (SYN) is the default when using the -sS option in Nmap port scanner.
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TCP scan is one of the most popular techniques used in port scanning tasks. It uses the first half of the three-way handshake, which leads to faster network port exploration times as the handshake is never completed.
While TCP scans are the most common types of port scans, ignoring the UDP protocol is a common mistake made by security researchers, one that can offer sensitive information through exposed network services, which can be likewise as exploited as the TCP services.
The Nmap version scanning subsystem obtains all of this data by connecting to open ports and interrogating them for further information using probes that the specific services understand.
One of Nmap's best-known features is remote OS detection using TCP/IP stack fingerprinting. Nmap sends a series of TCP and UDP packets to the remote host and examines practically every bit in the responses. After performing dozens of tests such as TCP ISN sampling, TCP options support and ordering, IP ID sampling, and the initial window size check, Nmap compares the results to its nmap-os-db database of more than 2,600 known OS fingerprints and prints out the OS details if there is a match.
Output files may also be used to resume aborted scans. Nmap makes output available in five different formats.
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In this video we will write a sample script.
Ethical hacking is legal because the hacker has full, expressed permission to test the vulnerabilities of a system. An ethical hacker operates within constraints stipulated by the person or organization for which they work, and this agreement makes for a legal arrangement. An ethical hacker is like someone who handles quality control for a car manufacturer. They may have to try to break certain components of the vehicle such as the windshield, suspension system, transmission, or engine to see where they are weak or how they can improve them. With ethical hacking, the hacker is trying to “break” the system to ascertain how it can be less vulnerable to cyberattacks. However, if an ethical hacker attacks an area of a network or computer without getting expressed permission from the owner, they could be considered a gray hat hacker, violating ethical hacking principles.
In this video we will write a sample script in nmap.
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While Nmap attempts to produce accurate results, keep in mind that all of its insights are based on packets returned by the target machines (or firewalls in front of them). Such hosts may be untrustworthy and send responses intended to confuse or mislead Nmap. Much more common are non-RFC-compliant hosts that do not respond as they should to Nmap probes. FIN, NULL, and Xmas scans are particularly susceptible to this problem.
In Idle Scan, the Zombie computer -as the name implies- has to be an “idle” host which cannot be found so easy sometimes.
Nessus is a remote security scanning tool, which scans a computer and raises an alert if it discovers any vulnerabilities that malicious hackers could use to gain access to any computer you have connected to a network. Nessus essentials
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Installing Nessus
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Download and Installing Nessus
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In the top navigation bar, click Scans.
The My Scans page appears.
In the left navigation bar, click Policies.
The Policies page appears.
In the upper right corner, click the New Policy button.
The Policy Templates page appears.
Click the ............. policy template that you want to use.
Configure the policy's settings.
Click the Save button.
The policy is saved.
Scan and Policy Templates
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Add a Report to a Scan
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metasploit : Introduction to MSF Console
metasploit framework : Msfconsole Commands, msf search function
penetration testing : Working with Exploits
Meterpreter Basic Commands. Using Meterpreter Commands. Since the Meterpreter provides a whole new environment, we will cover some of the basic
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Metasploit offers a number of post exploitation modules that allow for further information gathering on your target network. arp_scanner.
Incognito, originally a stand-alone application, allows you to impersonate user tokens. This was integrated into Metasploit and ultimately into Meterpreter.
windows hacking : Since this is a 32bit machine, we can proceed to load the Mimikatz module into memory.
Metasploit has a wide array of post-exploitation modules that can be run on compromised targets to gather evidence, pivot into a target network, and much more.
exploit : Managing Modules in MSF
Hydra to Crack a Web App's Password, Using Hydra, How to use Hydra
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bug bounty hunting :Crack an SSH password with hydra
Password cracking using Cain & Abel, Installation of Cain and Abel
Password cracking using Cain & Abel
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Password cracking using Cain & Abel, Dictionary attack with Cain and Abel
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John the Ripper is an Open Source password security auditing and password recovery tool available for many operating systems.
ethical hacking : Getting Started with GNS3
hacking : Getting Started with GNS3, First Project with GNS3
penetration testing : GNS3 consists of two software components: The GNS3-all-in-one software (GUI) The GNS3 virtual machine (VM)
bug bounty : Building GNS3 Network, creating GNS3 Network
hack : Connecting VMs on GNS3 with kali linux
cyber security : How to Configure VLAN in Cisco Layer 2 Switch in GNS3
network security : Introducing the macof Tool - Port Security - Ultimate Mac Address Flooding Tool
hacking : ARP Cache Poisoning with Ettercap
security : In this lecture, Keith Barker covers how to implement a DHCP starvation attack using Kali Linux and Yersinia
Welcome to the "Free Hacking Tools for Penetration Testing & Ethical Hacking" course
One lab, nine tool categories: sniff, scan, exploit, crack passwords, attack Layer 2, gather OSINT, hack web apps, and run social engineering, all with tools that cost nothing.
Every stage of a real penetration test has a tool behind it, and most of the best ones are free. This course puts the full toolkit in one place: the tools you'd otherwise learn one course at a time, together in a single lab, in the order a real engagement actually uses them.
You build your lab first, with Kali Linux, Metasploitable, OWASP Broken Web Applications, and Windows targets. Then you move through the toolkit stage by stage. You sniff and scan with Wireshark, TCPDump, Hping, and Nmap, including its full scripting engine. You scan for vulnerabilities with Nessus and exploit them with the Metasploit Framework, through Meterpreter and its post-exploitation modules. You crack passwords with Hydra, Cain & Abel, and John the Ripper. You attack the network layer itself, building real switch and router topologies in GNS3 and running MAC flooding, ARP cache poisoning, and DHCP starvation. You gather OSINT with Shodan, FOCA, theHarvester, Recon-ng, and Maltego, hack web applications with Burp Suite, ZAP, and SQLMap, and finish with social engineering and phishing using Veil, TheFatRat, Empire, and the Social Engineering Toolkit.
Whether you're putting together your first penetration testing toolkit, want one course that covers what several others do separately, or just want to see what each of these tools actually does, this course gives you hands-on time with all of them. You don't need previous experience with any of these tools to start. Enroll today and begin with lesson one.
What Skills Will You Learn in This Course?
Lab Setup: Build a complete lab with Kali Linux, Metasploitable, OWASP Broken Web Applications, and Windows targets.
Network Scanning and Sniffing: Capture traffic with Wireshark and TCPDump, run active scans with Hping, and scan networks fully with Nmap, including scripting and evasion.
Vulnerability Scanning and Exploitation: Scan for vulnerabilities with Nessus, exploit them with Metasploit and Meterpreter, and work through post-exploitation modules and extensions.
Password Cracking: Crack web app, SSH, and system passwords with Hydra, Cain & Abel, and John the Ripper.
Network Layer and Layer-2 Attacks: Build real switch and router topologies in GNS3, then run MAC flooding with Macof, ARP cache poisoning with Ettercap, and DHCP starvation with Yersinia.
OSINT and Web Application Hacking: Gather information with SearchDiggity, Shodan, FOCA, theHarvester, Recon-ng, and Maltego, and test web apps with Burp Suite, ZAP, and SQLMap.
Social Engineering and Phishing: Create and deploy payloads with Veil, TheFatRat, and the Empire Project, and run phishing campaigns with the Social Engineering Toolkit.
Who Is This Course For?
Aspiring Penetration Testers: Learners who want a complete, hands-on toolkit instead of learning one tool at a time.
Students Finishing an Ethical Hacking Path: People who've taken individual tool-focused courses and want everything brought together in one lab.
IT and Security Professionals: People who want practical, working familiarity with the tools used in a real assessment.
Bug Bounty Beginners: Learners who want hands-on time with web hacking and OSINT tools before they start.
Students and Career Changers: People moving into cybersecurity who want broad, tool-based practice.
Anyone Choosing Their First Security Tools: Learners who aren't sure which tools to learn and want to try the major ones before specializing.
You don't need previous experience with any of these tools to start. You do need a computer that can run virtual machines. The course starts with the lab setup and builds from there.
Why Learn These Tools?
A penetration tester's skill shows in how well they use a small set of tools, not how many they own. Wireshark, Nmap, Nessus, Metasploit, Hydra, Burp Suite, and the others in this course are the tools that show up again and again in real assessments and in job postings, because they work and they're free.
Knowing this toolkit applies directly to penetration tester, security analyst, and bug bounty roles. Even if you later specialize in one area, like web applications or network attacks, having used the full toolkit once makes it much easier to go deep into any single part of it.
Why Choose This Course?
Nine tool categories, one lab. You don't rebuild your lab for each tool. Everything in this course runs against the same environment you set up once.
Breadth without skipping the hands-on part. Each tool gets real, working practice, not a slide with a screenshot.
The full engagement order. Scan, find vulnerabilities, exploit, crack passwords, attack the network layer, gather OSINT, hack the web app, and run social engineering, in the order a real assessment follows them.
GNS3 included. You build and configure real Cisco switch and router topologies, not just attack pre-built targets.
Free tools only. Every tool in this course is free, so you don't need to buy anything to follow along.
A practical map for what to learn next. By the end, you know which tools you want to go deeper on, because you've actually used all of them.
Frequently Asked Questions
Which tools does this course cover?
Wireshark, TCPDump, Hping, Nmap, Nessus, Metasploit and Meterpreter, Hydra, Cain & Abel, John the Ripper, GNS3, Macof, Ettercap, Yersinia, SearchDiggity, Shodan, FOCA, theHarvester, Recon-ng, Maltego, Burp Suite, ZAP, SQLMap, Veil, TheFatRat, Empire, and the Social Engineering Toolkit.
Is this course a replacement for a dedicated Nmap or Metasploit course?
This course gives you hands-on practice with each tool so you understand what it does and how to use it, but a dedicated course on any single tool, like Nmap or Metasploit, will go deeper into that one area. This course is built to give you the full toolkit first.
Are all the tools really free?
Yes. Every tool in this course is free to use, so you don't need to buy any tool or application to follow along.
Do I need experience with any of these tools first?
No. The course starts with lab setup from scratch and introduces each tool before using it, so no previous experience with any of them is required.
What do I need to follow this course?
A computer that can run virtual machines (VirtualBox or VMware), since every tool is practiced against targets in your own lab.
Does the course cover web application hacking?
Yes. You use Burp Suite and ZAP to intercept and scan web traffic, and SQLMap to exploit SQL injection vulnerabilities.
Does the course cover network layer attacks?
Yes. You build real network topologies in GNS3 and run MAC flooding, ARP cache poisoning, and DHCP starvation attacks against them.
Is it legal to use these tools?
Using these tools on your own lab or systems you're authorized to test is legal. Using them against systems you don't own or have permission to test is not. This course is built entirely around a lab you set up yourself.
Why Learn These Tools with Muharrem Aydın?
Muharrem Aydın brings years of teaching and real-world experience to this course, with a practical, no-fluff approach: clear explanations, real examples, and every topic in a logical order. You study at your own pace and always have a way to ask when something is unclear.
Clear Video and Audio: See clearly, hear clearly, and learn without distractions.
Lifetime Access: Come back to any lesson whenever you want to review a topic.
Fast, Friendly Q&A Support: Ask your questions in the course Q&A section.
Certificate of Completion: Download your Udemy certificate when you finish the course.
Build Your Free Hacking Toolkit Today
Set up one lab, and put nine categories of free tools to work in it, from your first packet capture to a finished phishing campaign.
Enroll today in the Free Hacking Tools for Penetration Testing & Ethical Hacking course and take your next step toward a career in penetration testing.
Important: This course is created for educational purposes. Use what you learn only on systems you are authorized to test.