curl/docs/cmdline-opts/connect-to.md

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---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Long: connect-to
Arg: <HOST1:PORT1:HOST2:PORT2>
Help: Connect to host
Added: 7.49.0
Category: connection
Multi: append
See-also:
- resolve
- header
Example:
- --connect-to example.com:443:example.net:8443 $URL
---
# `--connect-to`
For a request intended for the `HOST1:PORT1` pair, connect to `HOST2:PORT2`
instead. This option is only used to establish the network connection. It does
NOT affect the hostname/port number that is used for TLS/SSL (e.g. SNI,
certificate verification) or for the application protocols.
`HOST1` and `PORT1` may be empty strings, meaning any host or any port number.
`HOST2` and `PORT2` may also be empty strings, meaning use the request's
original hostname and port number.
A hostname specified to this option is compared as a string, so it needs to
match the name used in request URL. It can be either numerical such as
`127.0.0.1` or the full host name such as `example.org`.