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    Nmap Command

    Uploaded by

    Francis Densil Raj
    Nmap is a network scanning tool that can scan ports on local and remote machines to determine which ports are open, the operating systems in use, software versions and other details. It can be used to scan entire networks and subnets and has options like verbose scanning, scanning multiple hosts from a file or IP range, and fast scanning of common ports. However, permission should be obtained before scanning machines you do not own.

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    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd

    Nmap Command

    Uploaded by

    Francis Densil Raj
    173 views14 pages
    Nmap is a network scanning tool that can scan ports on local and remote machines to determine which ports are open, the operating systems in use, software versions and other details. It can be used to scan entire networks and subnets and has options like verbose scanning, scanning multiple hosts from a file or IP range, and fast scanning of common ports. However, permission should be obtained before scanning machines you do not own.

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    nmap command

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    nmap command

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    Nmap is a network scanning tool that can scan ports on local and remote machines to determine which ports are open, the operating systems in use, software versions and other details. It can be used to scan entire networks and subnets and has options like verbose scanning, scanning multiple hosts from a file or IP range, and fast scanning of common ports. However, permission should be obtained before scanning machines you do not own.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    173 views14 pages

    Nmap Command

    Uploaded by

    Francis Densil Raj
    Nmap is a network scanning tool that can scan ports on local and remote machines to determine which ports are open, the operating systems in use, software versions and other details. It can be used to scan entire networks and subnets and has options like verbose scanning, scanning multiple hosts from a file or IP range, and fast scanning of common ports. However, permission should be obtained before scanning machines you do not own.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    of 14

    Nmap command

    Introduction
    • NMAP abbreviation is network mapper
    • NMAP is used to scan ports on a machine, either local or
    remote machine (just you require IP/hostname to scan).
    • NMAP is can be installed on windows, Sun Solaris
    machines too.
    • NMAP can be used to scan large networks, remember I
    am saying large networks.
    • NMAP can be used to get operating system details such
    as open ports,
    • software used for a service and it’s version no,
    • vendor of network card and up time of that system too
    • Please do not try to use NMAP on machines which
    you don’t have permission.
    • Can be used by hackers to scan for systems for
    vulnerability.
    • 192.168.0.100 – server1.tecmint.com
    • 192.168.0.101 – server2.tecmint.com
    Scan a System with Hostname and IP Address

    • The Nmap tool offers various methods to scan a system.


    • Perform a scan using hostname as server2.tecmint.com to find
    out all open ports, services and MAC address on the system.
    Scan using “-v” option

    • we can see that the below command with “-v”


    option is giving more detailed information about
    the remote machine.
    Scan Multiple Hosts
    • We can scan multiple hosts by simply writing their
    IP addresses or hostnames with Nmap.
    Scan a whole Subnet

    • we can scan a whole subnet or IP range with Nmap


    by providing * wildcard with it.
     Scan Multiple Servers using last octet of IP address

    • You can perform scans on multiple IP address by


    simple specifying last octet of IP address.
    Scan list of Hosts from a File
    • If we have more hosts to scan and all host details
    are written in a file , we can directly ask nmap to
    read that file and perform scans. Let’s see how to
    do that.
    • Create a text file called “nmaptest.txt” and define
    all the IP addresses or hostname of the server that
    you want to do a scan.
    • Next, run the following command with “iL” option
    with nmap command to scan all listed IP address in
    the file.
    • # nmap –iL filename
    Scan an IP Address Range

    • We can specify an IP range while performing scan


    with Nmap.
    Perform a Fast Scan

    • We can perform a fast scan with “-F” option to


    scans for the ports listed in the nmap-services files
    and leaves all other ports.
    • # nmap hostname

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