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curl/docs/cmdline-opts/ssl-reqd.md
Daniel Stenberg 7d8d25174c
docs/cmdline-opts: mention STARTTLS for --ssl and --ssl-reqd 
... since users might look for those terms in the manpage.

Closes #13590
2024-05-12 17:39:20 +02:00

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c SPDX-License-Identifier Long Help Protocols Added Category Multi See-also Example
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. curl ssl-reqd Require SSL/TLS FTP IMAP POP3 SMTP LDAP 7.20.0 tls boolean
ssl
insecure
--ssl-reqd ftp://example.com

--ssl-reqd

Require SSL/TLS for the connection - often referred to as STARTTLS or STLS because of the involved commands. Terminates the connection if the transfer cannot be upgraded to use SSL/TLS.

This option is handled in LDAP (added in 7.81.0). It is fully supported by the OpenLDAP backend and rejected by the generic ldap backend if explicit TLS is required.

This option is unnecessary if you use a URL scheme that in itself implies immediate and implicit use of TLS, like for FTPS, IMAPS, POP3S, SMTPS and LDAPS. Such a transfer always fails if the TLS handshake does not work.

This option was formerly known as --ftp-ssl-reqd.