What is the best solution to form spoofing?
<p>What is the best solution to "form spoofing" besides filtering the inputs?</p>

<p>I understand the followings:</p>

<ol>
<li><p>Referrer can be spoofed</p></li>
<li><p>Telnet can be used to fool the server</p></li>
<li><p>Client side filtering can be bypassed</p></li>
<li><p>i understand that i should avoid GET</p></li>
<li><p>I can use Captcha</p></li>
</ol>

<p>How can i prevent somebody to post to my form processing scripts from anywhere?</p>
