The FTP redirect does work for me. I have it in use at a location that's not near our office. I just used port 31021 in DM and at the local router/firewall, did a translation to push that through to port 21 of the ip for the 7100 and it worked for me. Then again, depends on the firewall that you are using as well if it can do NAT or port triggering to be able to translate the port from xxxxx to 21.