Trying to connect the ftp server & getting 5000 Illegal port command. This issue may occur when ftp program is not configured for Passive mode.
You may get error snippet such as:
COMMAND:> [3/11/2015 1:17:05 PM] PORT 192,168,0,101,196,215
[3/11/2015 1:17:05 PM] 500 Illegal PORT command.
ERROR:> [3/11/2015 1:17:05 PM] Syntax error: command unrecognized.
ERROR:> [3/11/2015 1:17:05 PM] Failed to establish data socket.
To resolve this issue you can define the port or ftp in configuration file of ftp server & define the IP Address or PASV server.
Check the configuration file for below settings.
pasv_max_port=Enter the max port range allowed on your server.
pasv_min_port=Enter the min port range allowed on your server.
pasv_address=Ip Address of your server.
After that restart the ftp service & check the ftp connection.