Standalone portable ftp server
I have a script which triggers a site to start a transfer (by passing username/password and server/port).
But the script also needs to start an ftpserver till the transfer is done. Then the server can disappear. I need to make it portable so it could run from a USB key, and it's ok to run as anonymous as it's on a secure network not to mention only active for a very short time.
What ftp program should I use and anyone have any hint how to set it up on a custom port as a non-root user?