In the flood of new and different features and functionalities introduced with Mac OS X 10.7 “Lion” there have also been important ones regarding the Document Sharing. The AFP is still there, untouched. Things begin to change with with SMB which now sports an ad-hoc server/client wrote from Apple since the GPLv3 licence adoption by project Samba – adottato dal 10.2 al 10.6 – per le nuove release dei suoi prodotti e le sue possibili implicazioni legali nel suo utilizzo [fonte]. 
The FTP protocol support, instead… puff! Vanished! But, as usual, one have always to remember that Apple lies!
(well, it was Finder lies! until now but, seeing things evolving, and maturing my knowledge of the platform, seems that the assumption can be made to their entire system).
The FTP daemon is still present in the system, hidden to user’s sight, and with the due methods still ready to be used. Apple enterely moved away it’s graphical use management tool (even if minimal) and leave the use to deal with the CLI to discourage it’s use. FTP protocol, in fact, is insicure transmitting our username and password credeantial in clear form, allowing anyone interested to be able to catch them!
But let’s go back to the issue. If you need the FTP protocol on your machine just open up Terminal.app and give this command:
sudo /usr/libexec/ftpd -D
and when you want to stop ip give this command, instead:
sudo killall ftpd
Now, if enabling/disablong the service is easy it’s configuration isn’t that easy (for the generic user). If you remember in Snow Leopard (and previous systems) we had this interface to enable/disable it and to choose the users enabled to use that service:

Now, instead, we have to manually configure the daemon.
man ftpd
is our best ally and we have to study it well, expecially if our machine is directly connected over the internet. When in local network, instead, the default setting are reasonably safe. To his personal use, and to people wanting easy way to manage all of this, Troncept has created the Lion FTPD Enable application that, in few clicks, does the job of graphically manage the FTP daemon. In this few months’ of Lion’s life, in fact, they’ve pushed out many realease of this tool, enhancing it step by step.
At the time of writing this post (after having it in the draft closet for a while) we’re near to 1.0 release and I’ve got in contact with his author for a small interview and tool insight!
In the end, if you need FTP to be consistent with your workflow OR if you need this protocol active on your Mac to be able to use the shared scanning features of your multifunction printer/fax/scanner at home or in office you can safely bet that using this tools will help you!
I’ve successfully managed to re-use Brother, Ricoh and Konica Minolta network scanners on different Macs!
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