![]() Anyone who as control of the network between you and your server will have access to your passwords used to login. This article goes fairly in depth on how to configure permissions and vsftpd settings: This article explains the firewall rules needed: Setting up your FTP users and permissions Restart your iptables systemctl restart iptables Look for a the line that has IPTABLES_MODULES=, change it to say: IPTABLES_MODULES="ip_conntrack_ftp" The FTP client then sets up the data channel from another random port to port 20 on the server.Īllowing your Linode to keep track of FTP connections sudo modprobe ip_conntrack_ftp. ![]() The FTP client sets up command channel from a random port to port 21 on the FTP server.Passive mode relies on the client to setup both channels If your local firewall does not allow incoming connections, you will not be able to use active mode FTP. The FTP server sets up a data channel back to the client from port 20 to the port that the client said it was listening on.The FTP client then starts listening for the data on that port.The FTP client picks another random port and tells the FTP server to send data back on that port.FTP client sets up the command channel by using a random port to connect to port 21 on the server.In addition it has two modes, active and passive. Using FTP uses separate channels for commands and data. Start and configure your FTP server to run at boot time sudo systemctl start vsftpd Update your repositories and install your FTP server sudo yum update It which runs over an SSH connection and provides end to end encryption for both your credentials and your data. For this reason, I strongly recommend that you use SFTP where possible. Additionally any files transmitted over the network can be read and even changed in transit.
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