Test outgoing open ports
#!/bin/bash | |
task(){ | |
LC_ALL=C nc -vzw5 portquiz.net $1 2>&1 | grep -v 'Connection timed out' | |
} | |
N=50 # Specify number of ports to check at once | |
( | |
for port in {1..65535}; do # Specify port range to check here | |
((i=i%N)); ((i++==0)) && wait | |
task "$port" & | |
done | |
) |
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super useful to test which port is open at my college ;)