There are no firewalls.

NFS is loaded on the all the systems with wich I try to mount the NAS. Mounting other NFS shares don't give any problems. Only when I try to mount the OPEN-E NAS I get the error.

When I rpcinfo -p to the other NFS shares, they are all running the normal services for nfs (portmapper, nfs, mountd, nlockmgr, status). The NAS is onlu tunning portmapper.

Is there a way to start the correct services again on the NAS ?