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NFSv3 mount from clients hang and timeout due to portmapper blocked on firewall

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Category:
ontap-9
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nas
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Applies to

  • ONTAP 9
  • NFS v3

Issue

  • Fresh attempts to mount NFS export hang and throw below (or similar) error

[root@RHEL7 ~] mount.nfs: Connection timed out 

  • Existing mounts continue to work until or unless they are unmounted
  • Run telnet or netcat (nc)  from the client to verify, it should succeed

  1. [root@RHEL7 ~]# telnet 10.11.12.13 2049 

    Trying 10.11.12.13...
    Connected to 10.11.12.13.

  2. [root@RHEL7 ~]# telnet 10.11.12.13 111
    Trying 10.11.12.13...
    telnet: connect to address 10.11.12.13: Connection refused

 

 

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