We have a production webserver running FreeBSD 6.1-STABLE.  We just moved from
a test server running the same OS.  The production server is essentially a
mirror image of the test server, absolutely nothing has changed other than
hardware.  The domain/host names, ssh configuration, etc. is exactly the same.

 One of our web developers is using Dreamweaver 8 on OS X.  He has a profile
set up for our webserver and was able to work off the test server for weeks
now, but as soon as we moved to the production server, he has been unable to
connect.  The error he's getting is as follows:

 "An FTP error occurred, cannot make connection to host.  Access denied."

 I've changed PasswordAuthentication to 'yes' in sshd_config as per the support
documents, even though it worked before and the error message was different.  
The user is able to open a terminal and connect to our server/upload files with
sftp.  The user can also connect to the server via ssh, or even use a gui
client like Fugu to send and recieve files via sftp.

 What could be wrong with dreamweaver?  My guess is that it has cached the host
key of the old server and is complainign because it doesn't match up with the
new host key?  Does Dreamweaver cache host keys?  If so, where are they located?

 Thanks for your time!

I see this post is several months old, but I've just resolved the same problem,
so I thought I would add my solution.

 Your suspicion about ssh keys was correct: Dreamweaver caches the keys. When
you change to a new server, it will have a new ssh key. Dreamweaver will
continue to try to use the old key, and your SFTP connection will fail because
of it. If you delete the cache file, Dreamweaver will recreate it the next time
you try to connect. It will grab the new key and everything will be okay again.

 I'm using Dreamweaver MX 2004 on Mac OS X 10.4 and the cache file was located
at Macintosh HD:Users:[username]:Library:Application
Support:Macromedia:Dreamweaver 8:Configuration:ssh_hosts

 According to
http://www.houseoffusion.com/groups/cf-talk/thread.cfm/threadid:51017...,
if you're using Windows you can find it at C:\Documents and
Settings\[username]\Application Data\Macromedia\Dreamweaver
8\Configuration\ssh_hosts

 Security note: The way SSH/SFTP works, you're supposed to get a warning when
you try to access a server whose key is not cached or is different from the
cached key. Dreamweaver doesn't show you these warnings, it's just says "yes"
and connects anyway. Make sure that the server you're connecting to is the one
you think it is before you send your password.

I have set up a SUSE box with open ssh and can connect sftp with Simon Latham's
sftp client. The same cannot be said for Dreamweaver CS3.

 Suse 10.2 is using openssh 4.4p1-24. If there is any suggestions on how to
make this work, I would appreciate it.

 Thanks.