FTP 220 Service Ready vs 230 User Logged In
Both FTP 220 (Service Ready) and 230 (User Logged In) belong to the 2xx Positive Completion category. 220 indicates that service ready for new user. This is the greeting message sent by the FTP server when a client first connects. Meanwhile, 230 means that user logged in, proceed. The authentication was successful and the user has full access to the FTP server.
描述
Service ready for new user. This is the greeting message sent by the FTP server when a client first connects.
何时出现
Immediately upon connecting to an FTP server. This is the welcome banner confirming the server is accepting connections.
如何修复
No fix needed — the server is ready. Proceed with USER and PASS commands to authenticate.
描述
User logged in, proceed. The authentication was successful and the user has full access to the FTP server.
何时出现
After providing valid credentials with USER and PASS commands, or after anonymous login on servers that allow it.
如何修复
No fix needed — you are authenticated. Proceed with CWD, LIST, RETR, STOR, or other file operations.
主要区别
FTP 220: Service ready for new user. This is the greeting message sent by the FTP server when a client first connects.
FTP 230: User logged in, proceed. The authentication was successful and the user has full access to the FTP server.
You encounter 220 when immediately upon connecting to an FTP server. This is the welcome banner confirming the server is accepting connections.
You encounter 230 when after providing valid credentials with USER and PASS commands, or after anonymous login on servers that allow it.
何时使用哪个
For 220 (Service Ready): No fix needed — the server is ready. Proceed with USER and PASS commands to authenticate. For 230 (User Logged In): No fix needed — you are authenticated. Proceed with CWD, LIST, RETR, STOR, or other file operations.