nfs export problem configuration not correct

[Tapas Mishra]

On Wed, Jan 5, 2011 at 2:39 PM, kapil singh kushwah
<kapil.network at gmail.com> wrote:
>
> Tapas,
> still getting the same error after entering * in /etc/exports followed by
> the service restart  (/etc/init.d/nfs-kernel-server restart)
> let me know for any other error.
> (check for the portmap on the server. it must be installed or properly
> running.)
> --
> Regards
> Kapil singh Kushwah
> Linux System Administrator
> RedHat Certified Engineer (RHCE)
> Call @ +91-9907514840
>
>
 I changed * by IP as you said and I was able to mount the said NFS
folder on client machine.
How ever I was not able to browse its contents
I was able to mount the said nfs share on client machine lets say its
hostname is client_hostname
but I was not able to go inside the mounted folder.

On the client machine

mount -t nfs <IP of server>:/media/vol2 /mnt/nfs

this did worked

but when from client machine I do
cd /mnt/nfs I get permission denied.

When I see a ls -l then I see an owner different than root (infact
username:groupname) shows me client machines hostname

here is out put of said nfs mount on client machine

drwx------  1 client_hostname client_hostname 20480 2011-01-03 17:43 nfs

on the nfs server which is my laptop the directory which I exported
its permissions are

drwx------ 1 tapas tapas 20480 2011-01-03 17:43 vol2


So thinking that this might be the problem I tried to change the
permissions on nfs-server folder itself

How ever this attempt to change permissions (as root) on the nfs-server failed.

Here is log from /var/log/syslog


Jan  6 10:26:05 tapas mountd[1531]: authenticated mount request from
172.21.100.147:964 for /media/vol2 (/media/vol2)

Jan  6 10:29:11 tapas mountd[1531]: authenticated unmount request from
172.21.100.147:833 for /media/vol2 (/media/vol2)
Jan  6 10:29:25 tapas mountd[1531]: authenticated mount request from
172.21.100.147:852 for /media/vol2 (/media/vol2)


How ever when ever I attach the USB hard disk to my laptop following
are the entries in syslog

Jan  6 10:24:12 tapas ntfs-3g[2278]: Mounted /dev/sdb5 (Read-Write,
label "vol2", NTFS 3.1)
Jan  6 10:24:12 tapas ntfs-3g[2278]: Cmdline options:
rw,nosuid,nodev,uhelper=udisks,uid=1000,gid=1000,dmask=0077
Jan  6 10:24:12 tapas ntfs-3g[2278]: Mount options:
rw,nosuid,nodev,uhelper=udisks,silent,allow_other,nonempty,relatime,fsname=/dev/sdb5,blkdev,blksize=4096,default_permissions
Jan  6 10:24:12 tapas ntfs-3g[2278]: Global ownership and permissions
enforced, configuration type 1

I am not having any clue as what might be the problem or why browsing
is failing in mounted folder?
Does it have any thing to do with the authentication?