Error:

Received too large (1433299822 B) SFTP packet. Max supported packet size is 1024000 B

This command changes the default shell from /bin/appliancesh to /bin/bash

chsh -s /bin/bash root

Users can connect with WINSCP without getting the too large packet error.

To return to the Appliance Shell, run this command:

chsh -s /bin/appliancesh root

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references:

Connecting to vCenter Server Virtual Appliance 6.0 using WinSCP fails with the error: Received too large SFTP packet (2115983) (vmware.com)