RE: ftp problem

[Andy Cranston <a.cranston@xxxxxxxxxxxxxxx>]

Hello Jim,

The symptom of an empty file being created but no data ever getting into the
file does sound like a port blocking issue.  Perhaps the network upgrade no
longer allows active ftp sessions but instead only allows passive ftp
sessions?  If that is the case then either get the network admins to lift
this restriction or get hold of a passive ftp client and see if that
improves the situation.

This page:

  http://slacksite.com/other/ftp.html

has a good explanation of the differences between active and passive ftp and
the issues you might encounter.

HTH.

Regards,

Andy Cranston.

-----Original Message-----
From: Jim Franz [mailto:franz400@xxxxxxxxxxxx]
Sent: 29 July 2003 15:03
To: Midrange Systems Technical Discussion
Subject: Re: ftp problem


I failed to fill in one point. An empty file is created.
The batch file later has a remote command (which runs fine)
and processes the empty file. I have verified the
particular file is not damaged (after reset of FTP server-same
file processes fine).
So FTP logs on, and from the PUT command, creates
an empty file, but stops on sending the data.
I like the idea of a port being blocked by the network, and
will have to investigate.
jim

----- Original Message -----
From: "Andy Nolen-Parkhouse" <aparkhouse@xxxxxxxxxxx>
To: "'Midrange Systems Technical Discussion'" <midrange-l@xxxxxxxxxxxx>
Sent: Tuesday, July 29, 2003 9:37 AM
Subject: RE: ftp problem


> Jim,
>
> In your script, are you explicitly specifying the port subcommand?  The
> OS/400 FTP server will generally default to port 21, but not under all
> circumstances.  The following is from the FTP manual:
>
> Port (PORT)
> Specifies the port number used for connecting to the FTP server.
> Normally the "well-known" port value of 21 is used to connect to the FTP
> server. Under some circumstances, the FTP server may be contacted at a
> port other than port 21. In those situations, the port parameter may be
> used to specify the server port to connect to.
>
> Perhaps in one of four tries, your system is going to a different port
> which is not allowed by your "network upgrade".  If that's the case and
> you don't have a port subcommand in your script, you could solve the
> problem by adding the subcommand.
>
> Regards,
> Andy Nolen-Parkhouse
>
> > At V4R5 I have a site I FTP to from an offsite pc, using a batch file &
> > WinXP, every week, 2 diff files.
> > Working for years. After a "network upgrade", the FTP is sometimes
> > "hanging" and won't work till i stop/start the FTP server. (have latest
> > cume)
> > ftp logs on
> > 200 PORT subcommand successful    and hangs there...
> >          never get 150 Sending file......
> >
> > I can see FTP job QTFTPxxxxx and nothing odd in log.
> > In exit program log i can see the SET and GET, just like successful one
> >
> > Happens about 1 out of 4 tries, but once happens, must reset FTP
> > server.
> > Any ideas?
> > jim franz
>
>
>
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