Please refer to the below steps positioning:
1, check whether can ssh FTPIP 21in the proxy PC. If not, please make sure whether FTP has started, and then detect whether the network is connected.
2, in the proxy PC using the browser access to FTP, the way is as follows: FTP://FTPIP, then input the user name and password, look to whether can enter it:
If you can't enter, namely the FTP configuration has problem, please according to the FTP configuration of the handbook inspects again.
If can enter, then the problem is very possible caused by the installed FTP’s random port is blocked by the Windows firewall or intermediate hardware firewall. Please according the following way to solute: open the software FileZilla in the firewall, and then in FileZilla software station set up the range of random port to fixed:
Choose the "Use custom port range", use a fixed port 20000, for instance, and then open the limitation of the port in hardware firewall.