Nmap: Difference between revisions
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'''Nmap''' (Network Mapper) <ref>[[wikipedia:Nmap]]</ref> is a cross-platform (BSD, Linux, Mac, Windows) utility for network discovery and security auditing. |
'''Nmap''' (Network Mapper) <ref>[[wikipedia:Nmap]]</ref> is a cross-platform (BSD, Linux, Mac, Windows) utility for network discovery and security auditing. |
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== Backgroud == |
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Nmap is a useful tool to find the IP address of a device (e.g. if the device acquired the IP address via DHCP) or to debug connectivity problems (e.g. to check if a firewall blocks ports). |
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== Network discovery example == |
== Network discovery example == |
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In a terminal window type: |
In a terminal window type: |
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nmap 192.168.1.* |
nmap -v 192.168.1.* |
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You can specify a specific IP address to scan a single host or use an asterisk (wildcard character) to scan an entire subnet. The resulting output contains a list of discoverd devices with their hostname, IP address and active network ports. |
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== UDP scan example == |
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sudo nmap -v -sU 192.168.0.1 |
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This command scans the UDP ports of a specific device. |
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The resulting output shows you a list of the discoverd devices with their accessible network ports. |
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== References == |
== References == |
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Latest revision as of 10:48, 16 April 2021
Nmap (Network Mapper) [1] is a cross-platform (BSD, Linux, Mac, Windows) utility for network discovery and security auditing.
Backgroud
Nmap is a useful tool to find the IP address of a device (e.g. if the device acquired the IP address via DHCP) or to debug connectivity problems (e.g. to check if a firewall blocks ports).
Network discovery example
In a terminal window type:
nmap -v 192.168.1.*
You can specify a specific IP address to scan a single host or use an asterisk (wildcard character) to scan an entire subnet. The resulting output contains a list of discoverd devices with their hostname, IP address and active network ports.
UDP scan example
sudo nmap -v -sU 192.168.0.1
This command scans the UDP ports of a specific device.