On NFS server I've got user with UID=1024 and GID=1204. On client side too. Both servers are CentOS 6.4 (2.6.32-358.2.1.el6.x86_64). Right now anonuid/anongid is not working. Files aren't mapped to 1024 uid but to 99 (nobody:x:99:99:Nobody:/:/sbin/nologin). /etc/exports /vol/test10.xxx.xxx.xxx(rw,all_squash,anonuid=1024,anongid=1024) /etc/fstab 10.xxx.xxx.xxx:/vol/test /nas/test nfs nosuid,intr,defaults,_netdev,intr 0 0