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Nmap: Network Exploration and Security Auditing Cookbook

You're reading from   Nmap: Network Exploration and Security Auditing Cookbook Network discovery and security scanning at your fingertips

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Product type Paperback
Published in May 2017
Publisher
ISBN-13 9781786467454
Length 416 pages
Edition 2nd Edition
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Author (1):
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Paulino Calderon Paulino Calderon
Author Profile Icon Paulino Calderon
Paulino Calderon
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Table of Contents (18) Chapters Close

Preface 1. Nmap Fundamentals 2. Network Exploration FREE CHAPTER 3. Reconnaissance Tasks 4. Scanning Web Servers 5. Scanning Databases 6. Scanning Mail Servers 7. Scanning Windows Systems 8. Scanning ICS SCADA Systems 9. Optimizing Scans 10. Generating Scan Reports 11. Writing Your Own NSE Scripts 12. HTTP, HTTP Pipelining, and Web Crawling Configuration Options 13. Brute Force Password Auditing Options 14. NSE Debugging 15. Additional Output Options 16. Introduction to Lua 17. References and Additional Reading

Discovering hosts with ICMP ping scans


Ping scans are used to determine if a host is online. ICMP echo request messages were designed specifically for this task, and naturally, ping scans use these packets to reliably detect the status of a host.

The following recipe describes how to perform an ICMP ping scan with Nmap and the flags for the different types of supported ICMP messages.

How to do it...

To make an ICMP echo request, open your terminal and enter the following command:

# nmap -sn -PE <target>

If the host responded, you should see something similar to this:

# nmap -sn -PE scanme.nmap.org
   Nmap scan report for scanme.nmap.org (74.207.244.221)  
   Host is up (0.089s latency).  
   Nmap done: 1 IP address (1 host up) scanned in 13.25 seconds  

How it works...

The arguments -sn -PE scanme.nmap.org tell Nmap to send an ICMP echo request packet to the host scanme.nmap.org. We can determine that a host is online if we receive an ICMP echo reply to this probe. By setting the --packet...

You have been reading a chapter from
Nmap: Network Exploration and Security Auditing Cookbook - Second Edition
Published in: May 2017
Publisher:
ISBN-13: 9781786467454
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