FileZilla connection to FTPS Server

I tried to connect to a FTPS server via FileZilla, but received the following error when trying to get the directory listing: “Server sent passive reply with unroutable address. Using server address instead.” Note that I can connect to the FTP server. Just not able to get to the directory listing.

It turned out that you need to specify port 22 (for FTPS) explicitly. Maybe FileZilla uses standard port 21 (for FTP).