I've been connecting to my web server with active mode in FileZilla with no problems. Over the weekend, an SSL certificate was dropped into a folder that I access with FTP, and which contains files for the website. Now I am receiving a 425 error in active mode on the FTP root, so I can't really do anything but log in. In passive mode, I can connect and move around in the directory tree, but the connection seems shaky. Occasionally I'll time out, and I can't get access at all to the folder containing the SSL certificate.
My question is how does the SSL certificate affect my FTP connection (if at all)? Does its presence demand the use of FTP over SSL?
Note: As far as I know, the only change which occurred was the placement of the SSL certificate. Firewall settings, FTP client and server settings should all be the same as before, when everything was working.