portscanner.sh

#!/bin/bash

#
# @author <a href="vegard.aasen@telenor.com">Vegard Aasen</a>
# @version 0.1

host=$1;
allPorts=$2;
ports="";

if [ -z "$host" ] || [ -z "$allPorts" ]; then
        echo "Usage: ./<scriptname> www.telenor.no \"80,90,8080\"";
        echo "\n";
        echo "Usage: ./<scriptname> www.telenor.no /tmp/ports.list";
        exit;
fi

checkPort() {
        local port=$1
        netcat -q 1 -w 1 -z $host $port < /dev/null
          if [ $? == 1 ]; then
            ports=$port" "${ports};
                echo "Potentially missing port {$port}";
          fi
}

if [ -f "$allPorts" ] && [ -e "$allPorts" ]; then
        echo "Checking if ports is open for domain {$1} using ports at {$2}";
        for port in `cat $allPorts`
        do
          checkPort $port
        done
else
        for port in $allPorts
        do
                checkPort $port
        done
fi

if [ ! -z "$ports" ]; then
        echo "Oops, the following ports {$ports} does not seem to be open. Used list {$allPorts} for host {$host}.";
else
        echo "It seems like all ports {$allPorts} is open. Used list {$allPorts} for host {$host}.";
fi

exit;