We are using an ASA 5505 in a small office LAN environment. When we try to run the update process on a postage machine (the machine connects to an ftp server to download updates) the process always times out with 0% transfered. I set a capture on the 5505 and it shows a "Request EPRT" being sent from the postage machine. The response from the server is "500 'EPRT' command not understood." The vendor, Pitney Bows, says it is a network issue, not a problem with the machine -- apparently they have never encountered this before. That is hard for me to believe, but I have to take their word for it. I tried to research EPRT and only know that it is an IPV6 command introduced to replace the PORT command. Is there anything I can do at the ASA to fix this? Any comments would be apprecaited.