I have a netware 6.5 SP2 server that is behind a NAT'ed firewall
(Netscreen). I have his IP mapped to an external IP address. My
clients are using FileZilla to connect, and they have host based
firewalls installed on their computers. When the user has the ftp
software set for passive mode, it never gives them a directory listing
and times out. If they connect in ACTIVE mode with their host based
firewalls turned off they can, most of the time, connect and get
directory listings. I do not want them to have to turn off their
firewalls in order to transfer files to me. Anyone inside my firewall
can connect via passive mode with no problems.

Here is the output that Filezilla gives me. Note I have changed my
internal IP address to and my external address to
for security purposes for this posting. My actual internal IP address
is a non-routable private IP and my external address is a fully
routeable public IP address. Any ideas? Thanks.

Status: Connecting to ...
Status: Connected with, negotiating SSL connection...
Response: 220 Service Ready for new User
Command: AUTH SSL
Response: 234 Enabling SSL
Status: SSL connection established. Waiting for welcome message...
Command: USER myuser
Response: 331 Password Needed for Login
Command: PASS *********
Response: 230 User myuser Logged in Successfully
Command: FEAT
Response: 500 'FEAT' : Unknown Command
Command: SYST
Response: 215 NETWARE Type : L8
Command: PBSZ 0
Response: 200 Protection Buffer Size set. PBSZ=0
Command: PROT P
Response: 200 Protection Level is set
Status: Connected
Status: Retrieving directory listing...
Command: PWD
Response: 257 "/HOME/myuser" is Current Directory
Command: TYPE A
Response: 200 TYPE Command OK A
Command: PASV
Response: 227 Entering Passive Mode (10,0,0,1,255,254)
Command: LIST
Response: 150 Opening data connection for (,65534)
Error: Transfer channel can't be opened. Reason: A connection attempt
failed because the connected party did not properly respond after a
period of time, or established connection failed because connected host
has failed to respond.
Error: Could not retrieve directory listing
Command: REST 0