In addition to what's stated in the title, I'm also able to ncftp successfully into a different server. But on server A, I get this
Could not connect to xxx.xxx.xxx.xxx -- try again later: Connection timed out.
indefinitely. These are Ubuntu 10.04, 64-bit servers. Is there some server-side setting I need to change on the server A to get it to work? (And if anyone's wondering, I need ncftp because it lets me upload a directory with subdirectories, whereas with (s)ftp there is apparently no way to do this.)