Untitled

https://codeshare.io/eV

#!/bin/bash

if [ $# -ne 2 ]; then
    echo "Usage: $0 <host_ip> <port>"
    exit 3  # NRPE Critical status code
fi

host_ip="$1"
port="$2"

timeout 3 /bin/bash -c "</dev/tcp/${host_ip}/${port}" &>/dev/null
if [ $? -eq 0 ]; then
    echo "OK: Port ${port} is open on ${host_ip}"
    exit 0  # NRPE OK status code
else
    echo "CRITICAL: Port ${port} is closed on ${host_ip}"
    exit 2  # NRPE Critical status code
fi