In active mode, the remote server opens the data channel. The second channel – the data channel – is opened differently in active and passive modes.

It’s a little like ordering a pizza: You make a phone call or put in an order via a website, but the actual pizza arrives by car or scooter. One is used for commands and responses, the other for the actual data being transferred. Since many servers on the internet don’t support both transfer modes, it’s recommended that you configure both transfer modes on your end.įTP and FTPS connections use two different channels to a server at once. These ports are not mandatory, however, so it’s best to allow outgoing connections to arbitrary remote ports. Most normal FTP servers use port 21, SFTP servers use port 22 and FTPS servers (implicit mode) use port 990 by default. If you want to connect to any server, you need to tell your firewall that FileZilla/FileZilla Pro should be allowed to open connections to other servers. The wizard will guide you through the necessary steps and can test your configuration. It is recommended to use the network configuration wizard.

Filezilla ftp server ssh attack