Java 7 prevents FTP transfers on Windows Vista and 7 if firewall is on. Any ideas?

Question

Java 7 prevents FTP transfers on Windows Vista and 7.

In FTP, before a file is transferred a PORT or a PASV command must be sent. As soon as one of the commands is

Answer 1

This problem can be demonstrated without JDK7, it's the firewall in Windows 7 blocking the ftp protocol when the application is using IPv6-mapped IPv4 addresses. See http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7077696 for more details and workarounds.