I have a ASA 5510 running 7.0(5) and I am having an FTP issue, which I cant seem to find a way to fix.
The issue is that after about 5 min of uploading any file (big or small, as long as it takes more than 5 min to upload), the ftp connection is reset.
I have tried a few different things to rule out other possible causes. I have tried FTP'ing from a few different boxes behind the firewall, to the same and other FTP servers, this all results in the same issue. I have tried ftp'ing from servers not behind the firewall, to the same ftp servers, and the problem does not exist. I am able to upload for10-20+ min without any resets.
I have sniffed the packets on the outside of the firewall, (filtering just the 2 server IP's), and at about the 5 min mark, just before the connection reset, I see a RST,ACK packet come back from the FTP server.
It seems as if the firewall thinks the connection is not fully open and after 5 min, it closes the connection between the 2 servers even though they are still transferring data.
I do not see any errors or other info in the logs either.
Has any one else had this problem and know how to fix it?
If you need more info etc, please let me know.