Nmap project

NETWORK SCANNER USING NMAPA PROJECT REPORTSubmitted bySHAURYA AGRAWAL [RA2111030010009]SONU KUMAR [RA2111030010021]SIDDHARTH SAXENA [RA2111030010029]Under the Guidance ofMS. IDA SERAPHIMAssociate Professor, Department of COMPUTER TECHNOLOGIESIn partial fulfilment of the requirements for the degree ofBACHELOR OF TECHNOLOGYinCOMPUTER SCIENCE AND ENGINEERINGwith a specialization in CYBER SECURITYDEPARTMENT OF NETWORKING ANDCOMMUNICATIONSCOLLEGE OF ENGINEERING AND TECHNOLOGYSRM INSTITUTE OF SCIENCE ANDTECHNOLOGY KATTANKULATHUR – 603 203NOVEMBER 2023SRM INSTITUTE OF SCIENCE AND TECHNOLOGYKATTANKULATHUR – 603 203BONAFIDE CERTIFICATECertified that this B project report titled “NETWORK SCANNING USING NMAP” is thebonafide work of Mr. Shaurya Agrawal [Reg. No.: RA2111030010009], Mr. Sonu Kumar [Reg.No], Mr. Siddharth saxena[Reg. No who carried out theproject work under my supervision. Certified further, that to the best of my knowledge the workreported herein does not form part of any other thesis or dissertation on the basis of which a degreeor award was conferred on an earlier occasion for this or any other candidate.MS. IDA SERAPHIMSUPERVISORAssociate ProfessorDepartment of ComputerTechnologiesDR. ANNAPURANI PANAIYAPPAN KHEAD OF THE DEPARTMENTDepartment of Networking andCommunicationsSIGNATURE OF INTERNALEXAMINERSIGNATURE OF EXTERNALEXAMINERINTRODUCTIONIn an era dominated by digital connectivity, the security of computer networks is ofparamount importance. The rise in cyber threats necessitates robust measures toidentify and address vulnerabilities within these networks. Network scanning, afundamental aspect of cybersecurity, plays a pivotal role in systematically probingand evaluating the security posture of a network. This project centers on theexploration of Network Mapper, more commonly known as Nmap.This report endeavors to delve into the intricacies of network scanning using Nmap,shedding light on its various scanning techniques, methodologies for efficient andstealthy scans, and practical implementation on test networks. As we navigatethrough the project, we will explore not only the technical facets of Nmap but alsothe ethical considerations that underscore responsible usage.The objectives of this project are multi-faceted. Firstly, it aims to provide acomprehensive understanding of Nmap, its historical evolution, and its relevance incontemporary network security. Subsequently, it will delve into the nuances ofNmap's scanning techniques, dissecting its capabilities in host discovery, portscanning, version detection, and the execution of custom scripts. The project willalso scrutinize the methodologies employed by Nmap to conduct scans with optimalspeed and precision while minimizing the risk of detection.In essence, this project serves as a comprehensive exploration of network scanningusing Nmap, providing readers with insights into its functionalities, applications, andthe ethical considerations integral to its responsible use in the realm ofcybersecurity. Through this journey, we aim to contribute to the broader discourseon network security, equipping individuals with the knowledge to enhance theresilience of digital infrastructures in an ever-evolving threat landscape.OBJECTIVE1. Understanding Nmap's Role in Network Security: Provide a detailed overview of Nmap, its historical development, and itssignificance in contemporary network security practices.2. Exploration of Nmap's Scanning Techniques: Examine the various scanning techniques employed by Nmap, includinghost discovery, port scanning, version detection, and script scanning.3. Optimizing Scanning Methodologies: Investigate strategies for efficient and stealthy network scans usingNmap, considering factors such as speed, accuracy, and minimizing therisk of detection by intrusion detection systems.4. Practical Implementation on Test Networks: Conduct hands-on experiments with Nmap on test networks toshowcase its practical application in different scenarios,

ANmap WrapperNmap wrapper for AndroidThis is not an official Nmap application. To know more about Nmap and its features visit theofficial homepage of the project: 2016 I applied for a GSoC at Nmap with a bid for an Android port of Nmap. I built an uglyprototype with a cross-compiled Nmap shared library, a C wrapper and a simple Android activity tointeract with it. The bid was not successful, and probably for good reasons.In 2022, I thought it would still be nice to be able to run Nmap from time to time from mysmartphone. I took the original prototype, polished it a bit and packaged it. It's still ugly, butit does its job. And maybe angry user feedback will motivate me to spend some time on it.How to install itThe application is available onGoogle Play.You can also install an APK fromthe release page here on GitHub.However, releases here on GitHub will generally lag behind those on Google Play.How to contributeContributions are welcome.How to cross-compile NmapBe aware that the script to compile Nmap is based on my development environment. You might need tofix some paths for it to be working on your system.cd app/src/main/cpp./make_nmap.shThe script will do the following:Download latest stable Nmap source and openssl source.Configure and compile openssl and Nmap for armeabi-v7a and arm64-v8a, x86 and x86_64.Import Nmap resource files (like nmap-services) to Android assets directory.Import NSE scripts included with Nmap source to Android assets directory.How to build the APK if you can't cross-compile NmapDownload an apk from the release page.Extract the content of the APK.Copy the lib folder inside the apk to app/src/main/cpp/libs.Copy the assets folder inside the apk to app/src/main/assets.Build the APK.

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Techniques can be used with Nmap to identify open ports on a targetsystem. Some of the most common techniques include TCP Connect Scan (-sT) and SYNScan (-sS) 1. TCP Connect Scan (-sT) establishes a full TCP connection with each targetport to determine whether the port is open. This technique is useful when you want areliable method to identify open ports on a target system, and you’re not as concernedabout being stealthy. SYN Scan (-sS) sends a TCP SYN packet to each target port andanalyzes the responses to determine whether the port is open. This technique is usefulwhen you want to be stealthy and avoid detection 1.ALGORITHMS1. Network Discovery Algorithm:2. Port Scanning Algorithm:3.4.5.These algorithms provide a foundational understanding of the processes involved innetwork scanning using Nmap. They can be adapted and expanded based on thespecific requirements of the project and the desired depth of information to beextracted during the scanning process.Customized Scanning Algorithm:Service Detection Algorithm:Operating System Detection Algorithm:7. DNS (Domain Name System): Purpose: Hostname Resolution Description: Nmap may use DNS to resolve IP addresses to hostnames,providing more human-readable information about the scanned hosts.8. DHCP (Dynamic Host Configuration Protocol): Purpose: IP Address Assignment Description: DHCP may be relevant in cases where Nmap is scanningdynamic IP address assignments. Understanding DHCP configurationscan contribute to a more comprehensive network scan.Understanding the use of these protocols is crucial for comprehending themechanics of network scanning using Nmap. The selection and combination of theseprotocols depend on the specific goals of the scan, the nature of the target network,and the desired information to be gathered during the scanning process.IMPLEMENTATIONCONCLUSIONIn conclusion, the exploration of network scanning using Nmap reveals amultifaceted approach to understanding and securing computer networks. Nmap, asan open-source tool, proves to be a cornerstone in the arsenal of cybersecurityprofessionals and network administrators.The literature review underscores the evolution of Nmap, its scanning techniques,and its ethical considerations, providing a foundation for the practicalimplementation discussed in this report. Real-world case studies exemplify the tool'spractical relevance in identifying vulnerabilities and enhancing overall networksecurity.The algorithms presented shed light on the intricacies of network discovery, portscanning, operating system detection, and service identification. These algorithmsform the backbone of the project, allowing users to customize scans based onspecific requirements and configurations.Protocols, ranging from ICMP for network discovery to SNMP for informationgathering, further enhance the capabilities of Nmap. The utilization of variousprotocols aligns with the tool's versatility, enabling it to adapt to diverse networkenvironments and configurations.The project's architecture, algorithms, and protocols collectively contribute to aholistic understanding of network scanning using Nmap.In essence, network scanning using Nmap emerges not only as a technical endeavorbut also as a strategic approach to fortifying digital ecosystems. By combiningtheoretical knowledge, practical implementation, and ethical considerations, thisreport aims to contribute to the ongoing discourse on cybersecurity practices,fostering a community of responsible and informed practitioners dedicated tosafeguarding the interconnected world of digital networks.