---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Long: socks4a
Arg: <host[:port]>
Help: SOCKS4a proxy on given host + port
Added: 7.18.0
Category: proxy
Multi: single
See-also:
  - socks4
  - socks5
  - socks5-hostname
Example:
  - --socks4a hostname:4096 $URL
---

# `--socks4a`

Use the specified SOCKS4a proxy. If the port number is not specified, it is
assumed at port 1080. This asks the proxy to resolve the hostname.

To specify proxy on a Unix domain socket, use localhost for host, e.g.
`socks4a://localhost/path/to/socket.sock`

This option overrides any previous use of --proxy, as they are mutually
exclusive.

This option is superfluous since you can specify a socks4a proxy with --proxy
using a socks4a:// protocol prefix. (Added in 7.21.7)

--preproxy can be used to specify a SOCKS proxy at the same time --proxy is
used with an HTTP/HTTPS proxy (added in 7.52.0). In such a case, curl first
connects to the SOCKS proxy and then connects (through SOCKS) to the HTTP or
HTTPS proxy.
