1--- 2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 3SPDX-License-Identifier: curl 4Long: connect-to 5Arg: <HOST1:PORT1:HOST2:PORT2> 6Help: Connect to host 7Added: 7.49.0 8Category: connection 9Multi: append 10See-also: 11 - resolve 12 - header 13Example: 14 - --connect-to example.com:443:example.net:8443 $URL 15--- 16 17# `--connect-to` 18 19For a request to the given `HOST1:PORT1` pair, connect to `HOST2:PORT2` 20instead. This option is suitable to direct requests at a specific server, 21e.g. at a specific cluster node in a cluster of servers. This option is only 22used to establish the network connection. It does NOT affect the hostname/port 23that is used for TLS/SSL (e.g. SNI, certificate verification) or for the 24application protocols. `HOST1` and `PORT1` may be the empty string, meaning 25"any host/port". `HOST2` and `PORT2` may also be the empty string, meaning 26"use the request's original host/port". 27 28A hostname specified to this option is compared as a string, so it needs to 29match the name used in request URL. It can be either numerical such as 30`127.0.0.1` or the full host name such as `example.org`. 31