Re: FTP limitation

[John Jones <chianime@xxxxxxxxx>]

FTP has a "control channel" and a "data channel".  What could be happening
is the transfer is taking long enough that the control channel is timing
out and aborting the transfer even though the data channel is busy.  This
timeout is controlled in the FTP server settings.  There could also be a
firewall timeout issue at play.  We used to encounter this when FTPing
large files but I can't remember if it was the firewall or server that was
at fault.  Wait .. Spot-checking our dev LPAR I see we raised our
inactivity timeout (default: 5 minutes) to the max value.  CHGFTPA/F4 lets
you see the settings.

Alternate: Have you tried any other FTP clients?
http://filezilla-project.org/ is free.  There's also CuteFTP and a host of
others.

A final thought which is something of a longshot but does your environment
have an IDS/IPS or DLP network monitor?  Basically an appliance that might
be finding something in the data that it thinks should be blocked.

On Wed, May 16, 2012 at 11:31 AM, Dave Snyder <DSnyder@xxxxxxxx> wrote:

> I have been struggling with an issue for several months and am getting no
> resolution from those I am working with, on all ends.
> I am trying to FTP (using WS-FTP) a text file from an FTP server to a
> local machine - have tried Windows XP and 7 with no differences. The file
> gets "truncated", chopped down to 3,260,000 bytes if it is more than that.
> We get the entire thing if it is less. I get no errors on either end.
> Anyone have any idea what might be restricting this file transmission size?
> I tried it from my home and it worked so I am guessing there is something
> network related on our front doing it, but we cannot figure it out. Any
> help is appreciated.
>
> Dave
>
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