I'm attempting to setup NFS on Centos5.2. I've got nfs, samba, and portmap setup and running. I need to access the NFS from a XenServer install, however I'm constantly returned the error 13. I'm trying:

mount -t cifs //10.1.1.3/Share /var/opt/xen/iso_import -o user=root,password=blahblah

I even tried with domain=10.1.1.3 after password=blahblah and still can't get in.

I've got portmap in /etc/exports as

10.1.1.3/Share *(rw,no_root_squash,sync)

I've even disabled the firewall on the 10.1.1.3 server using system-config-securitylevel

The exact error is:

mount error 13 = Permission denied
Refer to the mount.cifs(8) manual page (e.g.man mount.cifs)

What am I missing?

NB: I am new to this in case you couldnt tell

CIFS?

Try
mount -t nfs 10.1.1.3:/share /var/opt/xen/iso_import

And ensure the line: /share *(rw,no_root_squash,sync) is present in /etc/exports on 10.1.1.3.

And of course that directory /share is there on 10.1.1.3 as well.

user=10.1.1.3\\root

The client now just hangs when running that mount command. After about 5minutes it returns a timeout error.

OK, how about firewall settings on 10.1.1.3? Is NFS allowed there?
"iptables -L" output will help out here.