Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
curl
local-port
<num/range>
Force use of RANGE for local port numbers
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.