49 lines
1.4 KiB
Markdown
49 lines
1.4 KiB
Markdown
---
|
|
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
SPDX-License-Identifier: curl
|
|
Long: proto
|
|
Arg: <protocols>
|
|
Help: Enable/disable PROTOCOLS
|
|
Added: 7.20.2
|
|
Category: connection curl
|
|
Multi: single
|
|
See-also:
|
|
- proto-redir
|
|
- proto-default
|
|
Example:
|
|
- --proto =http,https,sftp $URL
|
|
---
|
|
|
|
# `--proto`
|
|
|
|
Tells curl to limit what protocols it may use for transfers. Protocols are
|
|
evaluated left to right, are comma separated, and are each a protocol name or
|
|
'all', optionally prefixed by zero or more modifiers. Available modifiers are:
|
|
|
|
## +
|
|
Permit this protocol in addition to protocols already permitted (this is
|
|
the default if no modifier is used).
|
|
|
|
## -
|
|
Deny this protocol, removing it from the list of protocols already permitted.
|
|
|
|
## =
|
|
Permit only this protocol (ignoring the list already permitted), though
|
|
subject to later modification by subsequent entries in the comma separated
|
|
list.
|
|
|
|
##
|
|
|
|
For example: --proto -ftps uses the default protocols, but disables ftps
|
|
|
|
--proto -all,https,+http only enables http and https
|
|
|
|
--proto =http,https also only enables http and https
|
|
|
|
Unknown and disabled protocols produce a warning. This allows scripts to
|
|
safely rely on being able to disable potentially dangerous protocols, without
|
|
relying upon support for that protocol being built into curl to avoid an error.
|
|
|
|
This option can be used multiple times, in which case the effect is the same
|
|
as concatenating the protocols into one instance of the option.
|