c: Copyright (C) Daniel Stenberg, , et al. SPDX-License-Identifier: curl Long: local-port Arg: Help: Force use of RANGE for local port numbers Added: 7.15.2 Category: connection Example: --local-port 1000-3000 $URL See-also: globoff Multi: single --- 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 that will be busy at times so setting this range to something too narrow might cause unnecessary connection setup failures.