Port Scan

havn scans ports. It's not in many repos, but if you can cargo install havn.

1havn -h
2havn -a
3domain=splint.rs
4havn -p 19-90 ${domain}

That last command doesn't work reliably, so increase the number of retries (-r), or decrease concurrent requests (-c).

1havn -p 19-443 -r 6 ${domain}
2havn -p 1-1000 -c 500 -r 5 ${domain}