title: why am I not able to telnet to a Google cloud machine even when all access is allowed
body: <p>To experiment with VPN, I have created a VPN firewall rule that allows access to all the ports from all the IPs.</p>
  
  <p><a href="https://i.stack.imgur.com/6eMht.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6eMht.png" alt="enter image description here"></a></p>
  
  <p>But when I telnet to the machine from my windows machine, I get error <code>telnet 35.197.238.136
  Connecting To 35.197.238.136...Could not open connection to the host, on port 23: Connect failed</code></p>
  
  <p>Why am I not able to telnet?</p>