Passive mode

Giganews Newsgroups
Subject: Passive mode
Posted by:  Michael J. Leaver (
Date: Sat, 06 Mar 2004

Passive mode: somtimes you have to use it, sometimes you cannot use it.

Is there any way to check if it is required and if it cannot be used? If
a server does support the passive mode (but does not require it), is
there any harm in using it as opposed to not using, e.g. are file
transfers slower?