All directories created over nfs have 777 permissions. # umask 022 # mkdir aaaa # ls -ld aaaa drwxrwxrwx 2 root root 2 Sep 12 13:45 aaaa # rmdir aaaa # mount|grep /mnt mazuelo:/home/sbio/ryan on /mnt type nfs (rw,relatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=132.204.84.95,mountvers=3,mountport=38634,mountproto=udp,local_lock=none,addr=132.204.84.95) The same happens for regular users. This is a very serious bug. The server is runnig the debian stretch 4.9 kernel, and the client is running a vanilla 4.4.155. Is there anything in the configuration causing this, or is it a kernel bug? Thanks, -ryan