# PROXY PROTOCOL PREFIXES The proxy string may be specified with a protocol:// prefix to specify alternative proxy protocols. (Added in 7.21.7) If no protocol is specified in the proxy string or if the string does not match a supported one, the proxy is treated as an HTTP proxy. The supported proxy protocol prefixes are as follows: ## http:// Makes it use it as an HTTP proxy. The default if no scheme prefix is used. ## https:// Makes it treated as an **HTTPS** proxy. ## socks4:// Makes it the equivalent of --socks4 ## socks4a:// Makes it the equivalent of --socks4a ## socks5:// Makes it the equivalent of --socks5 ## socks5h:// Makes it the equivalent of --socks5-hostname