Book Image

Nmap 6: Network Exploration and Security Auditing Cookbook

Book Image

Nmap 6: Network Exploration and Security Auditing Cookbook

Overview of this book

Nmap is a well known security tool used by penetration testers and system administrators. The Nmap Scripting Engine (NSE) has added the possibility to perform additional tasks using the collected host information. Tasks like advanced fingerprinting and service discovery, information gathering, and detection of security vulnerabilities."Nmap 6: Network exploration and security auditing cookbook" will help you master Nmap and its scripting engine. You will learn how to use this tool to do a wide variety of practical tasks for pentesting and network monitoring. Finally, after harvesting the power of NSE, you will also learn how to write your own NSE scripts."Nmap 6: Network exploration and security auditing cookbook" is a book full of practical knowledge for every security consultant, administrator or enthusiast looking to master Nmap. The book overviews the most important port scanning and host discovery techniques supported by Nmap. You will learn how to detect mis-configurations in web, mail and database servers and also how to implement your own monitoring system. The book also covers tasks for reporting, scanning numerous hosts, vulnerability detection and exploitation, and its strongest aspect; information gathering.
Table of Contents (18 chapters)
Nmap 6: Network Exploration and Security Auditing Cookbook
Credits
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
References
Index

Listing protocols supported by a remote host


An IP Protocol scan is useful for determining what communication protocols are being used by a host. This information serves different purposes, including packet filtering testing and remote operating system fingerprinting.

This recipe shows how to use Nmap to enumerate all of the IP protocols supported by a host.

How to do it...

Open a terminal and type the following command:

$nmap -sO <target>

The results will show what protocols are supported, along with their states.

# nmap -sO 192.168.1.254

Nmap scan report for 192.168.1.254
Host is up (0.0021s latency).
Not shown: 253 open|filtered protocols
PROTOCOL STATE  SERVICE
1        open   icmp
6        open   tcp
132      closed sctp
MAC Address: 5C:4C:A9:F2:DC:7C (Huawei Device Co.)

Nmap done: 1 IP address (1 host up) scanned in 3.67 seconds

How it works...

The flag -sO tells Nmap to perform an IP Protocol Scan. This type of scan iterates through the protocols found in the file nmap-protocols...