can't connect to server that requires only 1 connection

[Jim Michaels]

18:18:12 Status: Resolving address of douhar8.100webcustomers.com
18:18:12 Status: Connecting to :21...
18:18:12 Status: Connection established, waiting for welcome message...
18:18:12 Trace: CFtpControlSocket::OnReceive()
18:18:12 Response: 220 ProFTPD 1.2.9 Server (ProFTPD) [1.1.67]
18:18:12 Trace: CFtpControlSocket::SendNextCommand()
18:18:12 Command: USER *
18:18:13 Trace: CFtpControlSocket::OnReceive()
18:18:13 Response: 331 Password required for douhar8_100webcustomers.com.
18:18:13 Trace: CFtpControlSocket::SendNextCommand()
18:18:13 Command: PASS
18:18:13 Trace: CFtpControlSocket::OnReceive()
18:18:13 Response: 230 User douhar8_100webcustomers.com logged in.
18:18:13 Trace: CFtpControlSocket::SendNextCommand()
18:18:13 Command: SYST
18:18:13 Trace: CFtpControlSocket::OnReceive()
18:18:13 Response: 215 UNIX Type: L8
18:18:13 Trace: CFtpControlSocket::SendNextCommand()
18:18:13 Command: FEAT
18:18:13 Trace: CFtpControlSocket::OnReceive()
18:18:13 Response: 211-Features:
18:18:13 Response: 211-MDTM
18:18:13 Trace: CFtpControlSocket::OnReceive()
18:18:13 Response: 211-REST STREAM
18:18:13 Response: 211-SIZE
18:18:13 Trace: CFtpControlSocket::OnReceive()
18:18:13 Response: 211 End
18:18:13 Status: Connected
18:18:13 Trace: CFtpControlSocket::ResetOperation(0)
18:18:13 Trace: CControlSocket::ResetOperation(0)
18:18:13 Trace: CFileZillaEnginePrivate::ResetOperation(0)
18:18:13 Status: Retrieving directory listing...
18:18:13 Trace: CFtpControlSocket::SendNextCommand()
18:18:13 Trace: CFtpControlSocket::ChangeDirSend()
18:18:13 Command: PWD
18:18:13 Trace: CFtpControlSocket::OnReceive()
18:18:13 Response: 257 "/" is current directory.
18:18:13 Trace: CFtpControlSocket::ResetOperation(0)
18:18:13 Trace: CControlSocket::ResetOperation(0)
18:18:13 Trace: CFtpControlSocket::ParseSubcommandResult(0)
18:18:13 Trace: CFtpControlSocket::ListSubcommandResult()
18:18:13 Trace: state = 1
18:18:13 Trace: CFtpControlSocket::SendNextCommand()
18:18:13 Trace: CFtpControlSocket::TransferSend()
18:18:13 Trace: state = 1
18:18:13 Command: TYPE I
18:18:13 Trace: CFtpControlSocket::OnReceive()
18:18:13 Response: 200 Type set to I
18:18:13 Trace: CFtpControlSocket::TransferParseResponse()
18:18:13 Trace: code = 2
18:18:13 Trace: state = 1
18:18:13 Trace: CFtpControlSocket::SendNextCommand()
18:18:13 Trace: CFtpControlSocket::TransferSend()
18:18:13 Trace: state = 2
18:18:13 Trace: Retrieving external IP address from ​http://ip.filezilla-project.org/ip.php
18:18:13 Trace: Waiting for resolver thread
18:18:14 Trace: CFtpControlSocket::OnExternalIPAddress()
18:18:14 Trace: CFtpControlSocket::SendNextCommand()
18:18:14 Trace: CFtpControlSocket::TransferSend()
18:18:14 Trace: state = 2
18:18:14 Trace: Got external IP address
18:18:14 Command: PORT 71,20,152,159,8,123
18:18:14 Trace: CFtpControlSocket::OnReceive()
18:18:14 Response: 200 PORT command successful
18:18:14 Trace: CFtpControlSocket::TransferParseResponse()
18:18:14 Trace: code = 2
18:18:14 Trace: state = 2
18:18:14 Trace: CFtpControlSocket::SendNextCommand()
18:18:14 Trace: CFtpControlSocket::TransferSend()
18:18:14 Trace: state = 4
18:18:14 Command: LIST
18:20:24 Trace: CFtpControlSocket::ResetOperation(10)
18:20:24 Trace: CControlSocket::ResetOperation(10)
18:20:24 Trace: CFtpControlSocket::ResetOperation(10)
18:20:24 Trace: CControlSocket::ResetOperation(10)
18:20:24 Error: Directory listing aborted by user
18:20:24 Trace: CFileZillaEnginePrivate::ResetOperation(10)
18:21:23 Trace: CFtpControlSocket::OnReceive()
18:21:23 Response: 425 Unable to build data connection: Connection timed out
18:21:23 Trace: Skipping reply after cancelled operation or keepalive command.
18:28:12 Trace: CFtpControlSocket::OnReceive()
18:28:12 Response: 421 No Transfer Timeout (600 seconds): closing control connection.
18:28:12 Trace: Unexpected reply, no reply was pending.
18:28:12 Error: Connection closed by server
18:28:12 Trace: CControlSocket::DoClose(64)
18:28:12 Trace: CFtpControlSocket::ResetOperation(66)
18:28:12 Trace: CControlSocket::ResetOperation(66)
18:28:12 Trace: CFileZillaEnginePrivate::ResetOperation(66)
20:11:16 Trace: CFileZillaEnginePrivate::ResetOperation(0)
20:11:29 Trace: CControlSocket::DoClose(64)
20:11:29 Trace: CControlSocket::DoClose(64)
20:11:29 Status: Resolving address of douhar8.100webcustomers.com
20:11:29 Status: Connecting to 66.40.52.9:21...
20:11:30 Status: Connection established, waiting for welcome message...
20:11:30 Trace: CFtpControlSocket::OnReceive()
20:11:30 Response: 220 ProFTPD 1.2.9 Server (ProFTPD) [1.1.67]
20:11:30 Trace: CFtpControlSocket::SendNextCommand()
20:11:30 Command: USER douhar8_100webcustomers.com
20:11:30 Trace: CFtpControlSocket::OnReceive()
20:11:30 Response: 331 Password required for douhar8_100webcustomers.com.
20:11:30 Trace: CFtpControlSocket::SendNextCommand()
20:11:30 Command: PASS
20:11:30 Trace: CFtpControlSocket::OnReceive()
20:11:30 Response: 230 User douhar8_100webcustomers.com logged in.
20:11:30 Status: Connected
20:11:30 Trace: CFtpControlSocket::ResetOperation(0)
20:11:30 Trace: CControlSocket::ResetOperation(0)
20:11:30 Trace: CFileZillaEnginePrivate::ResetOperation(0)
20:11:30 Status: Retrieving directory listing...
20:11:30 Trace: CFtpControlSocket::SendNextCommand()
20:11:30 Trace: CFtpControlSocket::ChangeDirSend()
20:11:30 Command: PWD
20:11:30 Trace: CFtpControlSocket::OnReceive()
20:11:30 Response: 257 "/" is current directory.
20:11:30 Trace: CFtpControlSocket::ResetOperation(0)
20:11:30 Trace: CControlSocket::ResetOperation(0)
20:11:30 Trace: CFtpControlSocket::ParseSubcommandResult(0)
20:11:30 Trace: CFtpControlSocket::ListSubcommandResult()
20:11:30 Trace: state = 1
20:11:30 Trace: CFtpControlSocket::SendNextCommand()
20:11:30 Trace: CFtpControlSocket::TransferSend()
20:11:30 Trace: state = 1
20:11:30 Command: TYPE I
20:11:30 Trace: CFtpControlSocket::OnReceive()
20:11:30 Response: 200 Type set to I
20:11:30 Trace: CFtpControlSocket::TransferParseResponse()
20:11:30 Trace: code = 2
20:11:30 Trace: state = 1
20:11:30 Trace: CFtpControlSocket::SendNextCommand()
20:11:30 Trace: CFtpControlSocket::TransferSend()
20:11:30 Trace: state = 2
20:11:30 Trace: Retrieving external IP address from ​http://ip.filezilla-project.org/ip.php
20:11:30 Trace: Got external IP address
20:11:30 Command: PORT 71,20,152,159,16,209
20:11:30 Trace: CFtpControlSocket::OnReceive()
20:11:30 Response: 200 PORT command successful
20:11:30 Trace: CFtpControlSocket::TransferParseResponse()
20:11:30 Trace: code = 2
20:11:30 Trace: state = 2
20:11:30 Trace: CFtpControlSocket::SendNextCommand()
20:11:30 Trace: CFtpControlSocket::TransferSend()
20:11:30 Trace: state = 4
20:11:30 Command: LIST

this is as far as it gets before stopping. I never get a directory listing, I *suspect* because there is another connection on another thread, as shown in the debug log (resolver thread?).
don't know, since I didn't write it.

in any case, I can't connect to this server, because unlike other web hosting companies, this one has the requirement of only 1 connection to the sever, and I think Filezilla client is taking more than what it should. it is set for 1.

[Jim Michaels]

please hold - this may be totally bogus. the admin is telling me they changed the nameservers and restructured the site without repairing everybody's web sites.
the site displays, you just can't ftp anymore. lovely.

if I am able to get this working I will close this bug.

[Jim Michaels]

closing.