Although site-to-site transfers (FXP command) can expedite what otherwise could be a slow transfer, many administrators consider site-to-site transfers a security risk, exposing servers to "port theft" or "FTP by proxy" attacks. Depending on how your servers are configured, you might want to block these types of transfers.
To allow or block Site-to-Site transfers
Open the FTP Settings dialog box.
Do one of the following:
To allow transfers, select the Allow site-to-site transfers (FXP) check box.
To block transfers, clear the Allow site-to-site transfers (FXP) check box.
Click OK to close the FTP Settings dialog box.
Click Apply to save the changes on EFT.