#!/usr/bin/env bash
# Allows to access some web UIs through VPN

function sshtunnel {
  target=$1

  # get occupied ports by SSH sessions
  local_used_ports=$(lsof -PiTCP -sTCP:LISTEN | grep ssh | awk -F':' '{print $2}' | uniq | grep -Eo '[0-9]{1,5}')

  # define a port
  local_selected_port=$(shuf -n 1 <(seq 60000 | grep -Fxv -e{$local_used_ports}))

  echo "$target: https://localhost:$local_selected_port"
  ssh -L $local_selected_port:$target:443 oli@10.7.1.90
}

sshtunnel $1