NFS - Permission denied

[Ed Jabbour]

I lost an NFS connection to a Mac on the lan.  Now I get 

mount: 192.168.1.20:/Volumes/Alien failed, reason given by server: Permission 
deniied

The above Alien directory is owned by edj:100, same as on this Gentoo 
machine.  So are all the subdirectories.  I guess, therefore, that the 
problem is somewhere on the Linux side.  showmount -e seems correct:
Export list for 192.168.1.20:
/Volumes/Alien 192.168.0.0

As does rpcinfo -p 192.168.1.20
   program vers proto   port
    100000    2   tcp    111  portmapper
    100000    2   udp    111  portmapper
    100024    1   udp   1021  status
    100024    1   tcp   1015  status
    100021    0   udp   1008  nlockmgr
    100021    1   udp   1008  nlockmgr
    100021    3   udp   1008  nlockmgr
    100021    4   udp   1008  nlockmgr
    100021    0   tcp   1014  nlockmgr
    100021    1   tcp   1014  nlockmgr
    100021    3   tcp   1014  nlockmgr
    100021    4   tcp   1014  nlockmgr
    100005    1   udp    989  mountd
    100003    2   udp   2049  nfs
    100003    3   udp   2049  nfs
    100003    2   tcp   2049  nfs
    100003    3   tcp   2049  nfs
    100005    3   udp    989  mountd
    100005    1   tcp   1012  mountd
    100005    3   tcp   1012  mountd

fstab entry:
192.168.1.20:/Volumes/Alien   /mnt/alien   nfs rw,noauto,noexec,nosuid,nodev    
0 0

Any hints as to where to look for some misconfigured file greatly 
appreciated.  Thanks,

-- 
Ed Jabbour