Permission denied on NFS4 share with Ubuntu 14.04 client

[Joseph Loo]

On 10/13/2017 06:15 PM, John Ratliff wrote:
> I setup an NFS4 server on Debian 9. I have no issues with permissions on
> other Debian clients I have tried (Jessie or Stretch Debian Versions).
> 
> However, I have 3 Ubuntu 14.04 servers, and I always get permission
> denied errors on these servers.
> 
> I am not using Kerberos. Just plain IP based authentication.
> 
> This is my entry on Ubuntu 14.04 fstab.
> 
> nfs:/x/share /mnt/nfs        nfs4    ro,proto=tcp,sec=sys 0 0
> 
> This is my exports file on Debian 9 server.
> 
> /export 192.168.1.0/24(ro,fsid=0,no_subtree_check,sync)
> /export/x/share
> 192.168.1.0.0/24(ro,nohide,insecure,no_subtree_check,sec=sys)
> 
> Permissions on directory
> 
> /export/x/share 2750 (u+rwx g+rxs o-ALL)
> Owner is root
> Group is ssl-cert
> 
> The group ID on Ubuntu 14.04 is 999
> The group ID on Debian 9 is 999
> 
> I made sure these were the same.
> 
> $ ls -l
> total 4
> drwxr-s--- 2 root ssl-cert 4096 Oct 13 14:37 nfs
> 
> $ cd nfs
> -bash: cd: nfs: Permission denied
> 
> $ groups
> jratliff adm sudo staff ssl-cert qmail
> 
> $ grep ssl-cert /etc/group
> ssl-cert:x:999:jratliff
> 
> I've restarted every service I can think of on both the client and
> server. Then I rebooted them both, first the server then the client. No
> change.
> 
This is my exported directory file:
/export	*(fsid=0,crossmnt,rw,root_squash,sync,no_subtree_check)
/export/home0	192.168.20.0/8(rw,root_squash,sync,no_subtree_check)
127.0.0.0/8(rw,root_squash,sync,no_subtree_check)

I dn't know if you want your files to be rw but your setup will not
allow it. The 127.0.0.0/8 allows local mounts

execute showmount command to show the exported directory

-- 
Joseph Loo
jloo at acm.org