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FTP Server on DDNS Machine

One of my Client has a DDNS (Dynamic DNS) machine and I can connect to it via the name / temporary IP via Sockets.
I can also transfer messages via the Socket connection.
To transfer files I want to use the FTP Protocol but it did not work.
Any suggestions as to what may be minimum requirements for transfer files via FTP on DDNS.

Kimputer

There are no real minimum requirements. What are the error messages you see on the server console? What error messages do you see on the client console?

Dr. Klahn

If the machine is behind a firewall, check and confirm that the FTP port is forwarded to the machine in question, and that the FTP port is not firewalled.

If the system is linux, confirm that an FTP server is installed and is listening on port 21 as shown by netstat.

Allan_Fernandes

ASKER

Sorry client will be open only on Monday. Will get back then

Allan_Fernandes

ASKER

Following are the FtpServer and FtpClient logs. Please note that if I load the FTP Client on the same machine then it works fine.

FTP Server Logs
……
…..
! 111.11.111.11 connected
< 111.11.111.11 USER ABC
! Opening Accounts File: c:\XYZserver\ftpFls.ini
> 111.11.111.11 331 Password required for ABC.
< 111.11.111.11 PASS ABC
! 111.11.111.11=ABC is authenticated
! 111.11.111.11=ABC Home Directory: C:\FtpUpload\
> 111.11.111.11 230 User ABC logged in.
< 111.11.111.11 TYPE I
> 111.11.111.11 200 Type set to I.
< 111.11.111.11 SYST
> 111.11.111.11 215 UNIX Type: L8 ICS
< 111.11.111.11 FEAT
> 111.11.111.11 211-Extensions supported:
HOST
SIZE
REST STREAM
MDTM
MDTM YYYYMMDDHHMMSS[+-TZ] filename
MLST size*;type*;perm*;create*;modify*;
MFMT
MD5
XCRC "filename" start end
XMD5 "filename" start end
CLNT
SITE INDEX;ZONE;CMLSD;DMLSD
MODE Z
XCMLSD
XDMLSD
UTF8
LANG EN*
OPTS MODE;UTF8;
AUTH TLS;SSL;
CCC
PROT C;P;
PBSZ
211 END
< 111.11.111.11 PASV
> 111.11.111.11 227 Entering Passive Mode (222,222,2,222,222,222).

FTP Client Logs

PutFile:
DllDate: 2012
Username: MSERVER:Admin
Architecture: Little Endian; 32-bit
Language: C++ Builder XE2
VerboseLogging: 0
LocalFilename: c:\XYZ\XYZ.chm
RemoteFilename: FtpUploadTest.Chm
ProgressMonitoring:
enabled: yes
heartbeatMs: 0
sendBufferSize: 65536
--ProgressMonitoring
IdleTimeoutMs: 60000
ReceiveTimeoutMs: 60000
ConnectTimeoutSeconds: 60
initialGreeting: 220-Welcome to my Server
220-
220 ABC FTP Server ready.
restartNext: 0
ModeZ: 0
BinaryMode: 1
Passive transfer mode
setupPassiveDataSocket3:
hostAddr: 222.222.2.222
DataConnect:
hostname: 222.222.2.222
port: 55173
ConnectTimeoutMs_1: 60000
calling ConnectSocket2
IPV6 enabled connect with NO heartbeat.
This is an IPV4 numeric address...
AddrInfoList:
AddrInfo:
ai_flags: 4
ai_family: 2
ai_socktype: 1
ai_protocol: 0
ai_addrlen: 16
ai_canonname: (NULL)
--AddrInfo
--AddrInfoList
Connect using IPV4.
ipAddress1: 222.222.2.222
timeout waiting for connect to complete
numSec: 15
numMicroSec: 958000
Connect function failed..
SocketError: WSAEWOULDBLOCK The socket would block.
--DataConnect
Try setting the PassiveUseHostAddr property = true
setupPassiveDataSocket dataConnect failed.
--setupPassiveDataSocket3
SetupPassiveDataSocket: Elapsed time: 60232 millisec
Failed to setup passive data socket for PutFile
TotalTime: Elapsed time: 60232 millisec
Failed.
--PutFile

Kimputer

Since you get some response from the server/client, it means you have a problem with the passive ports in the firewall.
You have to find the settings for passive ports in your FTP server configuration, then select about 100 ports (for example, ports 21000 through 21100), then use the port range forward settings in your firewall/router, and make sure that as an EXTRA to the port 21 you already forwarded, to also forward ports 21000 through 21100 to that same server IP.
The next step would be to provide us with your FTP server (vendor/version), or to possibly think about using Filezilla Server (for its security feature, easy user interface, with settings easy to understand and configure).

Allan_Fernandes

ASKER

FileZilla FTP Server seems to be free or does it have any limitations ?

Allan_Fernandes

ASKER

What exactly do you mean by saying forward the ports 21000...
Is it that I tell my customer to open those ports ?

ASKER CERTIFIED SOLUTION

Kimputer

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Allan_Fernandes

ASKER

Thanks for the simple and to the point explanations