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Software components for data protection, secure storage and transfer

Implicit TLS and Explicit TLS in SecureBlackbox - SecureBlackbox®

Application-level protocols such as HTTP, FTP, SMTP, POP3, IMAP can be secured using SSL/TLS layer. This is done in two modes - explicit and implicit.
In implicit mode first SSL/TLS connection is established, then protocol connection is carried over the protected channel. In explicit mode the TLS connection parameters are negotiated using the command on the protocol level.

The table below will help you find which ports are used for each protocol in implicit and explicit modes:

Protocol Implicit TLS Explicit TLS
FTP 990 21
HTTP 443 80 (explicit mode is almost never used in HTTP)
POP3 995 110
SMTP 993, sometimes 465 25, 587

SecureBlackbox supports implicit and explicit modes in FTP, SMTP and POP3 components. This lets you connect to greater number of servers which use SSL/TLS.

Download SecureBlackbox.


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As of July 15, 2016 EldoS Corporation will operate as a division of /n software inc. For more information, please read the announcement.

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