Red Hat Security: Identity Management and Authentication
In this course, the main computer system used for hands-on learning activities is workstation.
Seven other machines are also used by students for these activities: client, idm, replica1, replica2, satellite, controller, and utility.
All machines are in the lab.example.com DNS domain.
All student computer systems have a standard user account, student, which has the password student.
The root password on all student systems is redhat.
Table 1. Classroom Machines
| Machine name | IP addresses | Role |
|---|---|---|
bastion.lab.example.com
|
172.25.250.254
| Bridges the classroom and student networks |
client.lab.example.com
|
172.25.250.11
| RHEL system used as IdM client |
controller.lab.example.com
|
172.25.250.7
| Automation controller server |
idm.lab.example.com
|
172.25.250.8
| RHEL IdM server |
replica1.lab.example.com
|
172.25.250.10
| RHEL IdM client; becomes replica server |
replica2.lab.example.com
|
172.25.250.13
| RHEL IdM client; becomes replica server |
satellite.lab.example.com
|
172.25.250.16
| Red Hat Satellite Server |
utility.lab.example.com
|
172.25.250.220
| RHEL server for single sign-on and other services |
workstation.lab.example.com
|
172.25.250.9
| Graphical workstation for student desktop |
The primary function of bastion is to act as a router between the network that connects the student machines and the classroom network.
If bastion is down, other student machines will only be able to access systems on the individual student network.
Several systems in the classroom provide supporting services.
Two servers, content.example.com and materials.example.com, are sources for software and lab materials used in hands-on activities.
The classroom.example.com machine is the NTP time source for the classroom.
Information on how to use these servers is provided in the instructions for those activities.
The top of the console describes the state of your machine.
Table 2. Machine States
| State | Description |
|---|---|
| Stopped | Your machine is completely shut down. Upon starting, your machine boots into the same state as when it was shut down (the disk is preserved). |
| Starting | Your machine is booting. |
| Active | Your machine is running and available (or, when booting, soon will be). |
| Stopping | Your machine is shutting down. |
| Impaired | A network connection to your machine cannot be made. Typically this state is reached when a student has corrupted networking or firewall rules. If the condition persists after a machine reset, or is intermittent, open a support case. |
Depending on the state of your machine, a selection of the following actions will be available to you.
Table 3. Machine Actions
| Action | Description |
|---|---|
| Start | Start (power on) the machine. |
| Shutdown | Stop the machine gracefully, preserving the contents of its disk. |
| Power Off | Power the machine off, preserving the contents of its disk. |
| Reset | Restarts the machine, resetting the disk to its initial state. Caution: Any work generated on the disk will be lost. |
Your Red Hat Online Learning enrollment entitles you to a certain amount of computer time. To help you conserve your time, the machines have an associated timer.
The Auto-stop timer decrements while your machine is running.
You can increase the timer as required to prevent your classroom from shutting down.
The Auto-destroy timer deletes your entire classroom environment, but likewise can also be increased.
