Modifying FileZilla to Workaround Bambu 3D Printer's FTP Issue
5 hours ago
- #Network Troubleshooting
- #FTP Protocol
- #3D Printing
- The Bambu A1 Mini 3D printer has an FTP server for uploading models and downloading timelapse videos, but FileZilla fails to list files despite correct login credentials.
- The FTP protocol uses separate control and data connections, with passive mode (PASV) being common for clients behind NAT, but Bambu's server returns an invalid IP (0.0.0.0) in PASV responses.
- Windows clients like WinSCP can work around this by forcing the server's IP for passive connections, while Linux/macOS redirect 0.0.0.0 to localhost, causing connection errors.
- FileZilla's source code was patched to treat 0.0.0.0 as an unroutable address, enabling proper FTP connections by using the server's actual IP from the control connection.
- Configuration details for connecting to the printer include using FTPS with the printer's IP, username 'bblp', an 8-digit password from settings, port 990, and implicit FTP over TLS in FileZilla.