How to Limit Read Access to the Passwd Column

1. Log in to the domain's master server.

   The examples in this task use the root master server, rootmaster.

2. Check the current table and column permissions.

   Use the niscat -o command.

   rootmaster# niscat -o passwd.org_dir

   This task assumes the existing permissions are:

   Access Rights : ----rmcdrmcdr--- Columns : [0] Name : name Access Rights : r-----------r--- [1] Name : passwd Access Rights : -----m---------- [2] Name : uid Access Rights : r-----------r--- [3] Name : gid Access Rights : r-----------r--- [4] Name : gcos Access Rights : r----m------r--- [5] Name : home Access Rights : r-----------r--- [6] Name : shell Access Rights : r-----------r--- [7] Name : shadow Access Rights : r-----------r---

   If your permissions are different, you may need to use a different syntax. For instructions, see Chapter 15, Administering NIS+ Access Rights.

3. Change the table permissions.

   Use the nischmod command to change the table's object-level permissions to ---- rmcdrmcd ----

   rootmaster# nischmod og=rmcd,nw= passwd.org_dir

4. Change the column permissions.

   Use the nistbladm command with the -u option to change the permissions of the passwd and shadow columns to:

   passwd ---- rm-- ---- ---- shadow ---- r--- ---- ---- rootmaster# nistbladm -u passwd=o+r, shadow=o+r passwd.org_dir

5. Verify the new permissions.

   Use the niscat -o command, as you did in Step 2. The permissions should look the same as they do in that step's output.