扫描端口的shell脚本
由 admin 发表于 11:32#!/bin/bash
alarm() {
perl -e ‘
eval {
$SIG{ALRM} = sub { die };
alarm shift;
system(@ARGV);
};
if ($@) { exit 1 }
‘ “$@”;
}
if [[ -z $1 || -z $2 ]]; then
echo “Usage: $0 <host> <port, ports, or port-range>”
return
fi
host=$1
ports=()
case $2 in
*-*)
IFS=- read start end <<< “$2″
for ((port=start; port <= end; port++)); do
ports+=($port)
done
;;
*,*)
IFS=, read -ra ports <<< “$2″
;;
*)
ports+=($2)
;;
esac
echo $host;
for port in “${ports[@]}”; do
alarm 1 “echo >/dev/tcp/$host/$port &&
echo \”port $port is open\”" ||
echo “port $port is closed”
done
