NFS connection lost every 10 minutes

[Cooky]

I now have NIS and NFS configured on my RedHat Enterprise Linux 4 box.
I can login from a client using an account on the NIS server so I know that part is working.

After I login, I can access all the files in my /home directory, which is mapped through NFS.
The problem is, within 10 minutes, client would lose connection of the mapped home directory.
When I try to manually mount the NFS share, or even just see a list of files, I get "Permission denied" error.

The only way to get the home directory back is to reboot the client.

Could anyone please tell me how I can fix this NFS timeout issue??
Thanks.

 

[lopingho]

Do you have any firewalls etc... that might be blocking RPC ?

 

[Cooky]

Thanks for the reply.

No I don't have firewall enabled on that box. (we've got Pix on our paremeter)
It turns out the forward and reverse DNS records on our DNS servers aren't consistent. Once I updated the record the connection has stayed stable.