1 Introduction

The File Transfer Protocol over TLS, commonly referred to as FTPS, is defined in [RFC4217]. The FTPS protocol enables the use of TLS to secure FTP transfers.

This specification extends the FTPS protocol with a feature that is commonly referred to as Implicit SSL. It also introduces the AUTH SSL message, to allow interoperability with legacy FTP clients.

Sections 1.5, 1.8, 1.9, 2, and 3 of this specification are normative. All other sections and examples in this specification are informative.

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