export and mount command and write

[root@rhs-cli-21 ~]# cat /etc/exports
/bricks/vfs	*(no_root_squash,rw,sec=sys:krb5:krb5i:krb5p)

[root@rhs-cli-18 ~]# mount -o sec=krb5i rhs-cli-21:/bricks/vfs /mnt
[root@rhs-cli-18 ~]# echo foo >/mnt/foo.02-18.krb5i
-bash: /mnt/foo.02-18.krb5i: Permission denied