FTP server를 설정했는데, 미국에서 접속은 되는데 자료 upload시 error가 발생합니다. 그쪽에서 보내온 자료는 아래와 같습니다. 문제해결 부탁드립니다. We are able to connect but get a critical error when trying to transfer data. Status: Resolving address of hannacorp.ipdisk.co.kr Status: Connecting to 220.88.207.36:21... Status: Connection established, waiting for welcome message... Status: Insecure server, it does not support FTP over TLS. Status: Server does not support non-ASCII characters. Status: Logged in Status: Retrieving directory listing... Status: Directory listing of "/" successful Status: Resolving address of hannacorp.ipdisk.co.kr Status: Connecting to 220.88.207.36:21... Status: Connection established, waiting for welcome message... Status: Insecure server, it does not support FTP over TLS. Status: Server does not support non-ASCII characters. Status: Logged in Status: Starting upload of E:\BW\jkl; Status: Retrieving directory listing of "/HDD1"... Command: TYPE I Response: 200 Type set to I Command: PASV Response: 227 Entering Passive Mode (220,88,207,36,112,107). Command: MLSD Response: 150 Opening BINARY mode data connection for MLSD Response: 226 Transfer complete Command: TYPE A Response: 200 Type set to A Command: PASV Response: 227 Entering Passive Mode (220,88,207,36,105,87). Command: STOR jkl; Response: 550 jkl;: Operation not permitted Error: Critical file transfer error Status: Starting upload of E:\BW\jkl; Command: CWD / Response: 250 CWD command successful Command: PWD Response: 257 "/" is the current directory Command: PASV Response: 227 Entering Passive Mode (220,88,207,36,72,229). Command: STOR jkl; Response: 550 jkl;: Operation not permitted Error: Critical file transfer error