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port-check.sh - small script to check if TCP ports are opened through firewalls etc.
#!/bin/bash
function checkport {
if nc -zv -w30 $1 $2 <<< '' &> /dev/null
then
echo "[+] Port $1/$2 is open"
else
echo "[-] Port $1/$2 is closed"
fi
}
# Example checks
checkport 'ad.server.one' 389
checkport 'ad.server.one' 636
checkport 'webserver.server.two' 443
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