Have a customer trying to use FTP on w2003 server. They connect ok. They get error when trying to upload file. Form the FTP log, I only see error below:
SUPERGLIDE 192.168.1.120 21 closed - 421 121
Whe does it mean?
I log on using exact same credentials, and the same MS FTP software, and it works.
I have didabled the IP checking on the server, even though their address is white listed. Still hails.