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Python one line access remote port
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| python -c "import socket; socket.setdefaulttimeout(2); print('Port is up √') if 0 == socket.socket(socket.AF_INET, socket.SOCK_STREAM).connect_ex(('google.com',4413)) else print('Port is down †')" |
timeout 2 bash -c "</dev/tcp/canyouseeme.org/809"; echo $?
</dev/tcp/google.de/80 && echo Port open. || echo Port closed.
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timeout 1 bash -c 'cat < /dev/null > /dev/tcp/google.com/80'
echo $?