FTPClient problem with remote-remote transfers

["Howard, Steven (US - Tulsa)" <st...@deloitte.com>]

I am working on an FTP file management system for my company and I am
using the FTPClient class. The two servers I am testing this portion on
are IIS - one on Windows 2003 and one on Windows NT 4.0. I am using
commons-net 1.2.2. The entire method is very long, but the portion where
an error continues to be encountered is as follows:

 

        try

        {

            if (mode == DtoolConst.FTP_MODE_PASSIVE)

            {

                System.out.println("mode 1");

                if (!ftp1.enterRemotePassiveMode())

                {

                    throw new IOException("Could not set " + serverName
+ " into passive mode\nThe server error returned was:"

                        + ftp1.getReplyString() + "\n" +
getLogIdInfo());

                }

                if (!
ftp2.enterRemoteActiveMode(InetAddress.getByName(ftp1.getPassiveHost()),
ftp1.getPassivePort()))

                {

                    throw new IOException("Could not set " + serverName2
+ " into active mode\nThe server error returned was:"

                        + ftp2.getReplyString() + "\n" +
getLogIdInfo());

 

                }

                System.out.println("mode set with both servers");

            }

            else

            {

                if (!ftp2.enterRemotePassiveMode())

                {

                    throw new IOException("Could not set " + serverName2
+ " into passive mode\nThe server error returned was:"

                        + ftp2.getReplyString() + "\n" +
getLogIdInfo());

                }

                if (!
ftp1.enterRemoteActiveMode(InetAddress.getByName(ftp2.getPassiveHost()),
ftp2.getPassivePort()))

                {

                    throw new IOException("Could not set " + serverName
+ " into active mode\nThe server error returned was:"

                        + ftp1.getReplyString() + "\n" +
getLogIdInfo());

 

                }

                System.out.println("Both servers set");

 

            }

        }

        catch (IOException e)

        {

            System.err.println(e.getMessage());

            logMsg.append(e.getMessage() + "\n");

            errored = true;

            stepIsSuccessful.addElement(new Boolean(false));

            auditStep(false);

            try

            {

                ftp1.disconnect();

                ftp2.disconnect();

            }

            catch (Exception f){}

            return;

        }

 

 

The error I always get is as follows. As you can see, (and I have
verified many times) the error occurs when trying to set one server into
active mode:

 

Could not set core_nt_11 into active mode

The server error returned was: 500 Invalid PORT command.

 

 

No matter which server I set as the active and which I set as the
passive, I always get the error about the Invalid PORT command. I do not
have a Solaris or Linux machine that can see these windows boxes, so I
am not able to test with them.

 

Can anyone spot a problem with what I am doing? Is there a known problem
with IIS not working with the remote-remote transfers?

 

Any help is appreciated.

 

Steve H.




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