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21 lines
1,003 B
Text
21 lines
1,003 B
Text
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# To open a TCP connection to port 42 of host.example.com, using port 31337 as the source port, with a timeout of 5 seconds:
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nc -p 31337 -w 5 host.example.com 42
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# To open a UDP connection to port 53 of host.example.com:
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nc -u host.example.com 53
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# To open a TCP connection to port 42 of host.example.com using 10.1.2.3 as the IP for the local end of the connection:
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nc -s 10.1.2.3 host.example.com 42
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# To create and listen on a UNIX-domain stream socket:
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nc -lU /var/tmp/dsocket
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# To connect to port 42 of host.example.com via an HTTP proxy at 10.2.3.4, port 8080. This example could also be used by ssh(1); see the ProxyCommand directive in ssh_config(5) for more information.
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nc -x10.2.3.4:8080 -Xconnect host.example.com 42
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# The same example again, this time enabling proxy authentication with username "ruser" if the proxy requires it:
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nc -x10.2.3.4:8080 -Xconnect -Pruser host.example.com 42
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# To choose the source IP for the testing using the -s option
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nc -zv -s source_IP target_IP Port
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