Only time I've gotten an error saying something about java on AndFTP was when I forgot my home NAS was turned off and my phone couldn't connect. Can you connect to your FTP server via a web browser on the computer?

I'm currently using FileZilla on my home server and everything is working great, but I was wondering how secure my connection is. I'm currently using FTPS explicit, but I was wondering how to use the certificate that FileZilla generates. When I log in from outside my LAN, the log shows that SSL/TLS ...