FTP 120 Service Ready Soon vs 228 Entering Long Passive Mode
FTP 120 (Service Ready Soon) is a 1xx Positive Preliminary response, while 228 (Entering Long Passive Mode) is a 2xx Positive Completion response. 120 indicates that the service will be ready in a certain number of minutes. The server is not yet available but expects to be shortly. In contrast, 228 means that entering Long Passive Mode. An extended version of passive mode that supports longer addresses, including IPv6. Largely superseded by EPSV (229).
Описание
The service will be ready in a certain number of minutes. The server is not yet available but expects to be shortly.
Когда вы это видите
When connecting to an FTP server that is starting up or temporarily busy with maintenance tasks.
Как исправить
Wait the indicated number of minutes and try connecting again. If the server never becomes ready, contact the server administrator.
Описание
Entering Long Passive Mode. An extended version of passive mode that supports longer addresses, including IPv6. Largely superseded by EPSV (229).
Когда вы это видите
After issuing the LPSV command on servers that support long addresses. Rarely seen in practice as EPSV is preferred.
Как исправить
No fix needed, but consider using EPSV (Extended Passive Mode) instead, which is more widely supported and simpler to parse.
Ключевые различия
120 is a 1xx Positive Preliminary response, while 228 is a 2xx Positive Completion response.
FTP 120: The service will be ready in a certain number of minutes. The server is not yet available but expects to be shortly.
FTP 228: Entering Long Passive Mode. An extended version of passive mode that supports longer addresses, including IPv6. Largely superseded by EPSV (229).
You encounter 120 when when connecting to an FTP server that is starting up or temporarily busy with maintenance tasks.
You encounter 228 when after issuing the LPSV command on servers that support long addresses. Rarely seen in practice as EPSV is preferred.
Когда что использовать
For 120 (Service Ready Soon): Wait the indicated number of minutes and try connecting again. If the server never becomes ready, contact the server administrator. For 228 (Entering Long Passive Mode): No fix needed, but consider using EPSV (Extended Passive Mode) instead, which is more widely supported and simpler to parse.