title: Is it common for an ISP to block outbound FTP (port 21)?
body: <p>I have a <a href="http://en.wikipedia.org/wiki/.NET_Framework" rel="nofollow">.NET</a> application and, as you know, the process of connecting to <a href="http://en.wikipedia.org/wiki/File_Transfer_Protocol" rel="nofollow">FTP</a> (port 21) using <a href="http://en.wikipedia.org/wiki/C_Sharp_%28programming_language%29" rel="nofollow">C#</a> is relatively easy, but I am unable to connect. I think it's an <a href="http://en.wikipedia.org/wiki/Internet_service_provider" rel="nofollow">ISP</a> issue, because the last time I logged in was like six months ago, and it all worked fine. I have also turned off all firewalls, but same thing happens. I can't even do it through a web browser. Is it common for us ISPs to block outbound connections? </p>
  
  <p>I am using <a href="https://en.wikipedia.org/wiki/Verizon_Communications" rel="nofollow">Verizon</a>.</p>