FTP not working on any FTP client not even with Mozilla or Chrome I am using a MacBook Pro with OS X 10.10.3. I am a developer and I use FTP on a regular basis. However I am new to OS X. It was working fine but suddenly FTP stops working for all FTP clients on my Mac for any server, even for ftp://ftp.mozilla.org/. I use NetBeans and use its most native Java based client. I tried with Firebug, FileZilla, Firefox, Chrome and OS X's native Finder client. I tried with Terminal as well — the response is:

Tousifs-MBP:~ tousifosman$ ftp -v ftp://ftp.mozilla.org/
Trying 63.245.215.56...
Connected to ftp.mozilla.org.
421 Service not available, remote server has closed connection.
ftp: Can't connect or login to host `ftp.mozilla.org'


However I am able to connect to all the servers from my Windows platform.
The occurred due to my local wifi network. It was some how blocking ftp. Replacing the router solved my problem