Their server also seems to require use of the CCC subcommand to clear the 
command channel.

To be clear, IBM's server does not require the FTP client to use the CCC subcommand. SMP/E's default behavior is to use CCC, with the idea that some local firewalls will be more accepting of FTPS if they can sniff the clear text commands to intercept the exchanged port values. Perhaps we're being naive, but that was the thought.

... There is a client parameter setting ftpccc="no" to make the server
quit using CCC, but that seems to cause a problem also.

SMP/E does allow you to turn off using the CCC subcommand, but I'm curious what problems you get when doing so. Since the server does not require use of CCC, I wonder if any errors you see with its use might be related to your firewall. We've seen examples of a firewall forbidding CCC, hence the need for the option to turn it off.

Kurt Quackenbush -- IBM, SMP/E Development

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