| Symptom | Likely Cause | Resolution | |---------|---------------|-------------| | 530 Login incorrect | Default credentials changed or case‑sensitive user mismatch | Verify credentials via direct console; reset via hardware jumper if forgotten. | | 425 Can’t open data connection | Passive port range blocked by firewall | Open the configured passive ports (e.g., 50000‑50010) inbound to the server. | | Timeout on large files | Insufficient buffer memory | Reduce file size; split data into chunks; upgrade firmware. | | Corrupted binary files | ASCII mode inadvertently used | Force binary mode in FTP client ( bin command). |
If FTP optimization does not yield the "better" results you need, consider if FTP is the right tool for the job. FTP is an old protocol with inherent inefficiencies. 10161oo244 icc ftp server better
The "oo244" build predates widespread FTP over TLS. Credentials and data fly in plaintext—unacceptable in modern OT environments. | Symptom | Likely Cause | Resolution |
The 10161oo244 has no built-in brute force protection. Add iptables rules on the host ICC machine (if Linux-based) or upstream firewall. | | Corrupted binary files | ASCII mode