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How to find which ports are blocked
21.01.2015
17:47
Текстовые метки: nc,console
Раздел: root - Linux

How to find which ports are blocked


If I just scan port 5900 from A I get

nc -v -w 1 B -z 5900


If you have a mean router in between which answers TCP requests instead of dropping them, you can find out by binding to all ports (warning, you could run out of system resources doing this! Maybe try with ~1000 ports at a time):

for i in {1..65535} ; do nc -l $i & done


Так же в этом разделе:
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