FTP proxy with authentication

[Venkatachalam, Saravanakumar]

Dear all,
 
 What is the right FTP proxy to go for. I need dual authentications to 
happen if a user wanted to connect to an ftp site.

1) Login to proxy with your local username/pasword
2) Connect to remote site with the user command

 I had a look at www.ftpproxy.org, but I'm not getting to understand how 
to configure it.

 TIA..

Thanks,
saravan