| Problem | Likely Cause | Solution | |---------|--------------|----------| | 534 Local policy requires TLS | Client not using explicit FTPS | Switch from port 21 plain FTP to port 990 or add AUTH TLS command. | | 500 I won't open a connection to <your IP> | Server’s reverse DNS check fails | Ensure your public IP has a valid PTR record; if not, request an exception through ICC support. | | Timeout after 20 seconds | Firewall blocking new passive ports | Add allow rule for 50000-50100 TCP outbound on your side; request ICC to confirm their side is open. |
The alphanumeric string is not random. In ICC-affiliated systems, such identifiers typically serve one of three purposes: 10161oo244 icc ftp server updated
Attempt an FTPS connection using a modern client (e.g., WinSCP or lftp ). The updated server must reject plain FTP attempts if the security policy is enforced. | Problem | Likely Cause | Solution |