Problem Description:
FTP server test environment are often not connected, this bell for 530 login incorrect error analysis and processing
FTP problem analysis mainly from the following aspects:
1. Network is smooth
If the network fails, then use ftp ip port to connect to FTP, not directly connected, will not let you enter a user and password, so the exclusion of the first case
2. whether the port is occupied
FTP and to the drain of the main port, a service listening port (listen_port = xxx), two ports are used for data transmission (pasv_min_port = xxx, pasv_max_port = xxx)
3. permission settings
This general lack of authority will be reported tips
4.FTP user password expires
If the above solutions did not solve, then see if the user password is expired (if it is a virtual user use, this problem does not exist)