[KLUG Members] How can outsider transfer files to my server without shell access?

[John Pesce]

I need a way for a client to regularly transfer files to my server
without giving them shell access. They prefer a command line something
so they can just modify their scripts. 
My IT border router police strongly discourage FTP because of the clear
text passwords. I'd love to give them sftp or scp access, but I don't
want them to have shell access or be able to wonder around my
filesystem. I looked at rssh, but the support seems thin, I'm not sure I
if I can trust it, and I can't get the jail option working.

I was thinking of something like wget that would let them post a file to
my webserver. wput seems to connect to ftp servers, isn't that just
another ftp client?  I didn't see anything in my Redhat Enterprise or
Suse 9.3 package lists that appeared applicable. Some kind of security
would be nice so that anybody doesn't start uploading files.

This seems like it would be a simple and common thing to do.