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###poor man's port scanner### #must support /dev/tcp -- use BASH #check port echo > /dev/tcp/127.0.0.1/8 && echo "Port is open" ||echo "Port is closed" #avoid errors on closed ports (echo > /dev/tcp/127.0.0.1/8) 2> /dev/null && echo "Port is open" ||echo "Port is closed" #scan many ports for i in {20..10000}; do (echo > /dev/tcp/127.0.0.1/$i) &>/dev/null && echo "Port $i is open"; done #as oneliner for i in {20..10000};do (echo > /dev/tcp/127.0.0.1/$i) &>/dev/null && echo "Port $i is open";done
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