tldr/pages/common/nc.md

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# nc
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> Netcat is a versatile utility for working with TCP or UDP data.
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> More information: <https://nmap.org/ncat>.
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- Listen on a specified port and print any data received:
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`nc -l {{port}}`
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- Connect to a certain port (you can then write to this port):
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`nc {{ip_address}} {{port}}`
- Set a timeout:
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`nc -w {{timeout_in_seconds}} {{ipaddress}} {{port}}`
- Serve a file:
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`nc -l {{port}} < {{file}}`
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- Receive a file:
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`nc {{ip_address}} {{port}} > {{file}}`
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- Server stay up after client detach:
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`nc -k -l {{port}}`
- Client stay up after EOF:
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`nc -q {{timeout}} {{ip_address}}`
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- Scan the open ports of a specified host:
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`nc -v -z {{ip_address}} {{port}}`
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- Act as proxy and forward data from a local TCP port to the given remote host:
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`nc -l {{local_port}} | nc {{hostname}} {{remote_port}}`