title: Using multiple local ips (127.0.0.2, 127.0.0.3) with ssh tunnels
body: <p>I have 3 servers (a, b, c) and each of them need an ssh tunnel to port 4000 of another 2 instances.</p>
  
  <p>I used to assign ports like 4001 goes to port 4000 on instance B and 4002 goes to 4000 on instance C, but it seems that using local ips 127.0.0/24 would be much less confusing, e.g. put <code>127.0.0.2 instance-a</code> to <code>/etc/hosts</code>, then use <code>ssh -L instance-a:4000:localhost:4000 instance-a.domain.com</code>. Does this approach bear any negative effects? Should it be used?</p>