Lancer SmartFTP en ligne de commandes
Posted 05 December 2005 - 08:06 PM
Posted 05 December 2005 - 08:42 PM
Edited by schtroumf, 05 December 2005 - 08:43 PM.
Posted 10 December 2005 - 01:02 AM
Explicit versus implicit SSL
Netscape originally developed Secure Socket Layer (SSL) for secure Web browsing. When both a client and server support the AUTH SSL command security is accomplished through a sequence of commands passed between the two machines. The FTP protocol definition provides at least two distinct mechanisms by which this sequence is initiated: explicit (active) and implicit (passive) security.
Explicit Security: In order to establish the SSL link, explicit security requires that the FTP client issue a specific command to the FTP server after establishing a connection. The default FTP server port is used. This formal method is documented in RFC 2228.
Implicit Security: Implicit security automatically begins with an SSL connection as soon as the FTP client connects to an FTP server. In implicit security, the FTP server defines a specific port for the client (990) to be used for secure connections.
Implicit SSL is discussed in various SSL drafts but is not formally adopted in an RFC. For strict compliance to standards, use the explicit method.
Because implicit SSL has a dedicated port strictly used for secure connections, implicit SSL connections require less overhead when you establish the session. There are various FTP servers that support this mode, including GlobalSCAPE EFT Server, GlobalSCAPE Secure FTP Server, RaidenFTPD, IBackup's FTP server, and others.
You can think of implicit security as "always on" and explicit security as "turn on." The following diagram contrasts implicit and explicit SSL connections.
Posted 10 December 2005 - 12:09 PM
- The sending of an AUTH command in only explicit method
- a description of exlicit method in RFC and not for implicit method
obviously, when the SSL connection is made, there is no difference
Edited by schtroumf, 10 December 2005 - 12:09 PM.
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