The Use Passive FTP check box may look pretty insignificant at first, but it's a good idea to know what it does. First, a little background about FTP connections will help.
When using FTP, there are two connections that are made. FrontPage makes the first connection by connecting to the server. This connection is not used to publish any files. It merely acts as a means of communication between FrontPage and the server so that the two can send commands back and forth to each other.
The server makes the second connection between it and FrontPage. This is the connection that is used to actually publish files in either direction. However, many firewalls do not like outside servers to establish that second connection. After all, the purpose of a firewall is to protect you from possible outside harm.
If this is the case, you may need to select the Use Passive FTP check box. With it selected, the server will not attempt to make the second connection. Instead, FrontPage will establish the second connection, and the publishing process can continue from there.
Note You may notice slower publishing performance with Passive FTP selected.