FTP 110 Restart Marker Reply vs 220 Service Ready
FTP 110 (Restart Marker Reply) is a 1xx Positive Preliminary response, while 220 (Service Ready) is a 2xx Positive Completion response. 110 indicates that the server is sending a restart marker reply. The text is exact and not left to interpretation. This marker is used to indicate the point at which a file transfer should be restarted. In contrast, 220 means that service ready for new user. This is the greeting message sent by the FTP server when a client first connects.
คำอธิบาย
The server is sending a restart marker reply. The text is exact and not left to interpretation. This marker is used to indicate the point at which a file transfer should be restarted.
เมื่อคุณพบเห็น
During a resumed file transfer when the server confirms the restart position in the data stream.
วิธีแก้ไข
No fix needed — this is a normal response during transfer recovery. If restarts keep failing, verify the marker format matches what your client expects.
คำอธิบาย
Service ready for new user. This is the greeting message sent by the FTP server when a client first connects.
เมื่อคุณพบเห็น
Immediately upon connecting to an FTP server. This is the welcome banner confirming the server is accepting connections.
วิธีแก้ไข
No fix needed — the server is ready. Proceed with USER and PASS commands to authenticate.
ความแตกต่างหลัก
110 is a 1xx Positive Preliminary response, while 220 is a 2xx Positive Completion response.
FTP 110: The server is sending a restart marker reply. The text is exact and not left to interpretation. This marker is used to indicate the point at which a file transfer should be restarted.
FTP 220: Service ready for new user. This is the greeting message sent by the FTP server when a client first connects.
You encounter 110 when during a resumed file transfer when the server confirms the restart position in the data stream.
You encounter 220 when immediately upon connecting to an FTP server. This is the welcome banner confirming the server is accepting connections.
ควรใช้อันไหนเมื่อไร
For 110 (Restart Marker Reply): No fix needed — this is a normal response during transfer recovery. If restarts keep failing, verify the marker format matches what your client expects. For 220 (Service Ready): No fix needed — the server is ready. Proceed with USER and PASS commands to authenticate.