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c: Copyright (C) Daniel Stenberg, daniel@haxx.se, et al. SPDX-License-Identifier: curl Long: haproxy-protocol Help: Send HAProxy PROXY protocol v1 header Protocols: HTTP Added: 7.60.0 Category: http proxy Multi: boolean See-also:

• proxy Example:
• --haproxy-protocol $URL

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--haproxy-protocol

Send a HAProxy PROXY protocol v1 header at the beginning of the connection. This is used by some load balancers and reverse proxies to indicate the client's true IP address and port.

This option is primarily useful when sending test requests to a service that expects this header.