After updating ProFTPd on a server running FreeBSD, certain clients (FireFTP specifically) were able to log in, but not transfer files or retrieve a directory listing. The following error was shown to the client user: 425 Unable to build data connection: Operation not permitted It appears that a recent change in ProFTPd’s default TLS handling… Read more »
SOLVED: FireFTP / ProFTPd Error ‘Unable to build data connection: Operation not permitted’
Thursday, September 16, 2010