How to send data from website to web server on raspberry pi?
<p>Let's say that I have a website somewhere over the internet. At my house there is a raspberry pi. </p>

<p>Can I send data from that website to that raspberry pi?</p>

<p>I have web server on that raspberry pi, and I tried sending a POST request from website, and it worked, but now anyone, who knows how to send POST request can just send that data to raspberry pi. I want to send that data to C++ program, that I'll write. How can I do it?</p>

<p>Can I do it another way, or somehow secure that POST request?</p>