I restore the fresh install database and setting the WPA2-Enterprise as well as OpenVPN again. The FTP client can connect to remote FTP server.
The only thing that I did not copy is not adding a route from subnet of ETH02 to default gateway.
Does it cause problem?
I enabled the RIPv2 for all interfaces (checked all boxes and issued a password). Then, the FTP client cannot connect to remote FTP server with the error message of “Connect timeout”.