Hello,
I have also issues with FTP server and not only. When I want to download something from the server, 1 file with a size of 1 Giga, it's starting download and after few seconds it's stopped / freeze. Seems to be something like a firewall that not let me access more than X mega because I have the same issue on Samba (download it start and after a while the speed become 0 and the download is not progressing) and on miniDLNA (I can see few seconds from a movie and than it stops). I had an SSH session opened during my troubleshooting and suddenly I got this: Process proftpd (pid: 22100, stack limit = 0x9f2b0210). Anyone knows what does it means stack limit = 0x9f2b0210 ?
These are all the message received in the SSH automatically without executing any commands via SSH.