This is twoftpd, an FTP server that strives to be secure, simple, and efficient. None of the back end commands can cause execution of other programs, and the normal model of execution does a chroot to the logged in user's directory immediately after authentication.
The name "twoftpd" comes from the fact that there were two parts to the server -- an authenticating front end, which contains no file or data transfer code, and a back end, which contains all the data transfer code.
Changes in version 1.41
- Fix a one-off buffer overrun in ASCII conversion in the STOR command.
- Fix resetting the output buffer Between listings.
- Added a $CONNECT_TIMEOUT setting to set timeouts on data connections.