#! /bin/bash
# Opens a local port that redirects to a remote server

if [ "$#" -lt 2 ]; then
    echo "Usage: $0 <remote_host> <remote_port> [local_port]"
    exit 1
fi
REMOTE_HOST=$1
REMOTE_PORT=$2
LOCAL_PORT=${3:-$REMOTE_PORT}

echo "Forwarding connections for 0.0.0.0:$LOCAL_PORT to $1:$2"
socat tcp-listen:$3,reuseaddr,fork tcp:$1:$2