dl/third/libcurl/docs/cmdline-opts/local-port.md

c, SPDX-License-Identifier, Long, Arg, Help, Added, Category, Multi, See-also, Example

c	SPDX-License-Identifier	Long	Arg	Help	Added	Category	Multi	See-also	Example
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	local-port	<range>	Use a local port number within RANGE	7.15.2	connection	single	globoff	--local-port 1000-3000 $URL

--local-port

Set a preferred single number or range (FROM-TO) of local port numbers to use for the connection(s). Note that port numbers by nature are a scarce resource so setting this range to something too narrow might cause unnecessary connection setup failures.