Possible reasons ftp disconnect or timeout

We did not use sftp or scp as Opensource freeware are not allowed
while the organization has no funds to get Commercial sftp.

Thus we used Windows ftp client to ftp to a couple of remote ftp
servers (which I suspect is also part of Windows 2008 ftp server).

We've been facing abrupt disconnect & timeout (as shown in ftp
server logs).

Doing continuous ping (using script to timestamp) will not show
timeouts on all the intermediate (& the end points) 5-7 hops.

What are the possible reasons for this & how can I troubleshoot
further?
sunhuxAsked:
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AlexPaceConnect With a Mentor Commented:
Some FTP servers support the NOOP command as in "no operation" .... you can send it on the control channel to prevent a timeout while a long transfer happens on the data channel.
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Jaroslav MrazConnect With a Mentor CTOCommented:
Hi,

I had the same problems but you must try it with antoher client like windos explorer. Or filezilla to be shure wher the problem is.

Sometimes it is in script http://www.howtogeek.com/howto/windows/how-to-automate-ftp-uploads-from-the-windows-command-line/


but to be shure you cant use freeware software in comapny?
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CSIPComputingConnect With a Mentor Commented:
Initial hunch is it's an inactivity timeout - possibly caused by a slow connection, but as you are the FTP client, that'll be hard to diagnose.

You may need to set up a passive connection to get through the firewall and maintain a connection.

How to set this will vary depending on your FTP client.
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sunhuxAuthor Commented:
Does Win 2008's ftp server support NOOP & how to enable this?
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sunhuxAuthor Commented:
It's Cisco ASA bug as acknowledged by Cisco.
Anyone know which bug article (pls provide
exact url) at Cisco website has this?
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