title: How to ping proxies ? ie in IP:PORT format
body: <p>Well I decided to try make a proxy checker, like Charion or Elite proxy checker. These programs accept large lists of proxies in the IP:PORT format, ping them tell you the response time</p>
  
  <p>see the screenshot of Elite Proxy Checker, im trying to make a simplified version of this program. <a href="http://i52.tinypic.com/a57slh.jpg" rel="nofollow">http://i52.tinypic.com/a57slh.jpg</a></p>
  
  <p>I investigated and made my checker using Ping.SendAsync(ip, timeout, ip) method.
  It was only afterwards that I discovered that you can only Ping IP's using this method, not the ports as well.</p>
  
  <p>Ive spent a few hours trying to find the correct class/methods in order to be able to ping ports, reading different forum posts from experts they say its impossible to ping ports only IPS, can only use sockets to try open a connection with the port.</p>
  
  <p>However, I have seen programs that people have coded in VB.NET that ping in the IP:PORT format, ie lets you choose timeout, tells timeout, etc.</p>
  
  <p><strong>My question is , what classes methods should I be using to do this ?</strong></p>
  
  <p>Im pretty sure its not sockets... theyve got to be pinging the individual ports as well somehow.</p>
  
  <p>Any help would be appreciated.</p>
  
  <p>Cheers,</p>
  
  <p>(I code for a hobby, im not a pro, so sorry if I make glaring errors)</p>