title: mount.nfs: portmap query failed: RPC: Unable to receive - Connection refused in Centos 7 client
body: <p>I am trying to connect to a nfs server. where i seeing the below issue.</p>
  
  <pre><code>mount.nfs: timeout set for Mon May 11 19:27:01 2020
  mount.nfs: trying text-based options 'nfsvers=3,addr=IP'
  mount.nfs: prog 100003, trying vers=3, prot=6
  mount.nfs: portmap query retrying: RPC: Timed out
  mount.nfs: prog 100003, trying vers=3, prot=17
  mount.nfs: portmap query failed: RPC: Unable to receive - Connection refused
  </code></pre>
  
  <p>nfs-utils is installed and running in the client. 
  rpcbind is running in the client machine. 
  Ports 111, 2049 and 892 are opened to the NFS server.
  However i am not sure if i am missing anything to resolve this issue. </p>