Active FTP vs. Passive FTP, a Definitive Explanation

2023年10月24日 — The firewall must allow connections on port 21. The firewall must allow connections to the ephemeral ports used by the FTP application.

In passive mode FTP the client initiates both connections to the server, solving the problem of firewalls filtering the incoming data port connection to the ...

8 天前 — The default port for an FTP control connection is Port 21. The second connection type is a data connection, where the FTP server transfers files ...

2023年2月16日 — FTP commands are transferred over a primary connection called the Control Channel, which is typically the well-known FTP port 21. FTP data ...

2024年3月5日 — FTP uses port 21 for control connections and port 20 for data connections. FTPS uses port 990 for control connections and port 989 for data ...

2022年3月22日 — Use [low port]-[high port] for a port range, where each port must be between 1025 and 65535. For example, 5000-6000. · Use 0-0 to configure the ...

2024年2月22日 — Configure the firewall ... Note: The system enables passive ports 49152 through 65534 for Pure-FTPd servers and ProFTPD servers by default. You ...

This topic describes functions in FTP that enable you to use FTP sessions that are secured by SSL/TLS using both network address translation (NAT) and ...

2018年10月19日 — For FTP, the default is port 21. For SFTP (SSL Encrypted), it's typically 22.

2021年9月8日 — Active FTP · port 21要能接受來自任何地方的連線(client要能夠對server發起連線請求) · port 21能夠將response回到client端的command port (>1024) · port ...