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| c | SPDX-License-Identifier | Long | Help | Protocols | Added | Category | Multi | See-also | Example | ||||
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| Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. | curl | ssl | Try enabling TLS | FTP IMAP POP3 SMTP LDAP | 7.20.0 | tls | boolean |
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--ssl
Warning: this is considered an insecure option. Consider using --ssl-reqd instead to be sure curl upgrades to a secure connection.
Try to use SSL/TLS for the connection. Reverts to a non-secure connection if the server does not support SSL/TLS. See also --ftp-ssl-control and --ssl-reqd for different levels of encryption required.
This option is handled in LDAP (added in 7.81.0). It is fully supported by the OpenLDAP backend and ignored by the generic ldap backend.
Please note that a server may close the connection if the negotiation does not succeed.
This option was formerly known as --ftp-ssl (added in 7.11.0). That option name can still be used but might be removed in a future version.