What is the difference between Implicit SSL and Explicit SSL?

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URL: http://www.tbsoftinc.com/support/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=47
Article ID: 47
Created On: 30 Sep 2005 03:33 AM

Answer In explicit SSL (or in TLS) the FTP client needs to send an explicit command ( i.e. "AUTH SSL" or "AUTH TLS") to FTP server to initiate a secure control connection; while in implicit encryption the client establishes secure control connection upon connection with the server. Default server port for implicit SSL is 990.