Differences
This shows you the differences between the selected revisions of the page.
| 2015-03-09 | 2015-10-02 | ||
| typo (martin) | modes in the title (martin) | ||
| Line 1: | Line 1: | ||
| - | ====== FTP Connection Modes ====== | + | ====== FTP Connection Modes (Active vs. Passive) ====== |
| [[ftp|FTP]] may operate in an active or a passive mode, which determines how a data connection is established. In both cases, a client creates a TCP control connection to an FTP server command port 21. This is a standard outgoing connection, as with any other file transfer protocol (SFTP, SCP, WebDAV) or any other %%TCP%% client application (e.g. web browser). So, usually there are no problems when opening the control connection. | [[ftp|FTP]] may operate in an active or a passive mode, which determines how a data connection is established. In both cases, a client creates a TCP control connection to an FTP server command port 21. This is a standard outgoing connection, as with any other file transfer protocol (SFTP, SCP, WebDAV) or any other %%TCP%% client application (e.g. web browser). So, usually there are no problems when opening the control connection. | ||