FTP connections support two methods: active and passive modes. Connection establishment and exchange of command parameters are done over port 21. Just a bit of background: A typical FTP server listens on TCP ports 20 for data and 21 for command (also known as control port). This tutorial will focus on setting up and securing FTP service using vsftpd with SSL/TLS enabled. SFTP is built as an extension of SSH, and can be used with other security protocols as well. SFTP (SSH File Transfer Protocol) is another method of ensuring security of transit data.
Based on client-side requirements, FTPS can be configured to support encrypted and/or unencrypted connections. For example, FTPS (FTP Secure) uses SSL/TLS certificates to encrypt end to end data. Many applications with security features can be used to set up secure FTP services. FTP itself was not designed as a secure protocol, and as such, the classic FTP service is vulnerable to common attacks such as man in the middle and brute force attacks. How to set up a secure FTP service with vsftpd on LinuxįTP or File Transfer Protocol is one of the widely used services on the Internet, mainly for transferring files from one host to other.
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