#!/bin/bash
set -euo pipefail

HOST="54.207.0.31"
PORT="4444"

echo "[*] Checking operating system..."
uname -a

echo "[*] Checking connectivity to ${HOST}:${PORT}..."

if nc -vz -G 5 "$HOST" "$PORT" 2>&1; then
    echo "[+] TCP connection successful."
else
    echo "[-] Could not connect to ${HOST}:${PORT}"
    exit 1
fi

echo "[+] Lab connectivity looks good."