From Fedora Project Wiki


Offline access to sudo rules.


  • Make sure you have sudo 1.8.6 rc3 or later installed (Koji build).
  • Make sure you have SSSD 1.9.0beta7 or later installed (Koji build).
  • Install FreeIPA server with DNS on one machine,, and FreeIPA client on another machine, (see Basic installation tests).

How to test

Configure SSSD

On, you have to make some changes to /etc/sssd/sssd.conf.

Make sure the sudo service is enabled in the [sssd] section:

services = nss, pam, ssh, sudo

In the FreeIPA domain section, you have to make the following changes (see man sssd-sudo for more information):

sudo_provider = ldap
ldap_uri = ldap://
ldap_sudo_search_base = ou=sudoers,dc=ipa,dc=example,dc=com
ldap_sasl_mech = GSSAPI
ldap_sasl_authid = host/
ldap_sasl_realm = IPA.EXAMPLE.COM
krb5_server =

Finally, restart SSSD:

root@client# systemctl restart sssd.service

Configure sudo

Configure sudo on to use SSSD for sudoers in /etc/nsswitch.conf:

sudoers: sss

Note that after this setting, sudo will use SSSD sudoers only, /etc/sudoers will be ignored.

Sudoers setup

First, authenticate as admin:

user@server$ kinit admin

Create a user:

user@server$ ipa user-add sudouser --first Sudo --last User

Set initial password for the user:

user@server$ ipa passwd sudouser

Create a sudo rule:

user@server$ ipa sudorule-add testrule --hostcat all --cmdcat all --runasusercat all --runasgroupcat all

Add the user to the sudo rule:

user@server$ ipa sudorule-add-user testrule --users sudouser

Sudo testing

Log in as sudouser:

user@client$ su - sudouser

Note that you will be prompted to change the password.

Verify that you are allowed to run sudo:

sudouser@client$ sudo id
We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:

    #1) Respect the privacy of others.
    #2) Think before you type.
    #3) With great power comes great responsibility.

[sudo] password for sudouser: 
uid=0(root) gid=0(root) groups=0(root) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023

Now go offline. You can do that by disconnecting the client from network, shutting down the server, etc.

After going offline, you should still be able to use sudo:

sudouser@client$ sudo id
[sudo] password for sudouser: 
uid=0(root) gid=0(root) groups=0(root) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023

Expected Results

All the test steps should end with the specified results.