topic Re: Access denied on Multi protocol SVM NFS mount in Network and Storage Protocols

Access denied on Multi protocol SVM NFS mount

TimJMcCuen — Wed, 04 Jun 2025 10:08:54 GMT

Hello,

I followed the SMB /CIS and NFS Multiprotocol Configuration guide for ontap 9.7

I was able to create the SVM, volume etc as the guide describes.

I am able to go to a Windows servers and successfully access the share and write to the volume.

When I log into my Red Hat Linux 7.9 client I am able to sudo bash and do mkdir /mnt/folder

When I enter the command "mount -t nfs -o nfsvers=3,hard <data lif IP>:/test (volume name) /mnt/folder

I get the error mount:nfs access denied by server while running mount <SVM IP>:/test

My export is set to include the IP of the server I am trying to mount the volume test on with access protocols CIFS/NFS read-only rule never, RW rule Any, Superuser access Any. I applied this export to to volume in the junction path.

Under Host users and name mapping I set Unix to Windows pattern (.+) replacement ENG\\1 and under Windows to Unix the pattern is ENG\\(.+) and replacement is \1. This what is recommended to do in this manual.

I am no Unix guru but I have ssuccessfully set up NFS SVM's and have been able to mkdir /mnt touch files on this same Unix server.

Not sure where I went wrong or what other information would be helpful to troubleshoot this? THanks.

Re: Access denied on Multi protocol SVM NFS mount

hmoubara — Thu, 18 Nov 2021 03:45:37 GMT

Hello,

To be able to mount via NFS you will need to have read access for the root vol and read-write for the volume in junction-path.

You can run the below command to check where the failing is occuring.

cluster1::> vserver export-policy check-access -vserver <vserver-name> -client-ip <Ip address> -volume
<volume name> -authentication-method sys -protocol nfs3 -access-type read-write

The below kb can help you troubleshoot the issue:

https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/Troubleshooting_Access_Denied_or_Mount_Hung_from_NFS_client_for_clustered_Data_ONTAP

Thanks

Re: Access denied on Multi protocol SVM NFS mount

TimJMcCuen — Thu, 18 Nov 2021 20:14:22 GMT

Thank you. This is very helpful. I think I am getting hung up on the Name mapping Unix to Windows and Windows to Unix. I put in the values as described in the Multiprotocol Guide. When I ran secd authentication show-creds -node <node name> -vserver <vserver name> -uid 0 I got the output could not find Windows name "ENG\1" Failure: name mapping for Unix user 'root' failed. Explicit Mapping failed and no default mapping found. Perhaps I should change ENG\1 to something else? Do you know of any document that describes / gives examples of Name Mapping (unix to windows, windows to unix). Thanks.

Re: Access denied on Multi protocol SVM NFS mount

hmoubara — Tue, 23 Nov 2021 03:50:43 GMT

Check the below link:

https://docs.netapp.com/us-en/ontap/nfs-admin/create-name-mapping-task.html

Thanks