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pystun3:tldr:a990d

pystun3: Make a STUN request and specify the stun server.

pystun3

$ pystun3 --stun-host ${stun-1und1-de}

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The command pystun3 --stun-host ${stun-1und1-de} is used to run the pystun3 tool with a specific STUN server host.

Here's what each part of the command means:

pystun3: This is the name of the command or tool being executed. It is likely a Python program called pystun3 used for STUN (Session Traversal Utilities for NAT) testing.
--stun-host: This is a command line option or argument used to specify the STUN server host that will be tested. The value that follows refers to a variable called ${stun-1und1-de}.
${stun-1und1-de}: This variable, enclosed in ${}, represents the STUN server host that will be used for the STUN test. The actual value of the variable is not provided in the command, so it might be defined elsewhere in the script or environment.

To summarize, this command runs the pystun3 tool and instructs it to perform a STUN test using the STUN server host specified by the ${stun-1und1-de} variable.

This explanation was created by an AI. In most cases those are correct. But please always be careful and never run a command you are not sure if it is safe.

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