Enabling Security on the Control Plane

Omnia uses FreeIPA (on RockyOS) and 389ds(on Leap) to enable security features like authorisation and access control.

Enabling Authentication on the Control Plane:

Once all pre-requisites are met, set the parameter 'enable_security_support' to true in base_vars.yml

Note:

In the event that control_plane.yml fails after executing the control plane security tasks, sshd services will have to be restarted manually by the User.

Once security features are enabled on the control plane, /etc/resolv.conf will become immutable. To edit the file, run chattr -i /etc/resolv.conf . To make file immutable after edits, run chattr +i /etc/resolv.conf. Changes made using this method may not be persistent across reboots.

Limiting User Authentication over sshd

Users logging into this host can be optionally allowed or denied using an access control list. All users to be allowed or denied are to be listed in the variable user in security_vars.yml.

Note: All users on the server will have to be defined manually. Omnia does not create any users by default.

Session Timeout

To encourage security, users who have been idle over 3 minutes will be logged out automatically. To adjust this value, update the session_timeout variable in security_vars.yml. This variable is mandatory.

Restricting Program Support

Optionally, different communication protocols can be disabled on the control plane using the restrict_program_support and restrict_softwares variables. These protocols include: telnet,lpd,bluetooth,rlogin and rexec. Features that cannot be disabled include: ftp,smbd,nmbd,automount and portmap.

Logging Program Executions using Snoopy

Omnia installs Snoopy to log all program executions on Linux/BSD systems. For more information on Snoopy, click here.

Logging User activity using PSACCT/ACCT

Using PSACCT on Rocky and Acct on LeapOS, admins can monitor activity. For more information, click here.

Configuring Email Alerts for Authentication Failures

If the alert_email_address variable in security_config.yml is populated with a single, valid email ID, all authentication failures will trigger an email notification. A cron job is set up to verify failures and send emails every hour.

Note: The alert_email_address variable is optional. If it is not populated, authentication failure email alerts will be disabled.

Log Aggregation via Grafana

Loki is a datastore used to efficiently hold log data for security purposes. Using the promtail agent, logs are collated and streamed via a HTTP API.

Note: When control_plane.yml is run, Loki is automatically set up as a data source on the Grafana UI.

Querying Loki

Loki uses basic regex based syntax to filter for specific jobs, dates or timestamps.

Select the Explore tab to select control-plane-loki from the drop down.
Using LogQL queries, all logs in /var/log can be accessed using filters (Eg: {job=???Omnia???} )

Viewing Logs on the Dashboard

All log files can be viewed via the Dashboard tab (). The Default Dashboard displays omnia.log and syslog. Custom dashboards can be created per user requirements.

Below is a list of all logs available to Loki and can be accessed on the dashboard:

Name	Location	Purpose	Additional Information
Omnia Logs	/var/log/omnia.log	Omnia Log	This log is configured by Default
syslogs	/var/log/messages	System Logging	This log is configured by Default
Audit Logs	/var/log/audit/audit.log	All Login Attempts	This log is configured by Default
CRON logs	/var/log/cron	CRON Job Logging	This log is configured by Default
Pods logs	/var/log/pods/ * / * / * log	k8s pods	This log is configured by Default
Access Logs	/var/log/dirsrv/slapd-/access	Directory Server Utilization	This log is available when FreeIPA or 389ds is set up ( ie when enable_security_support is set to 'true')
Error Log	/var/log/dirsrv/slapd-/errors	Directory Server Errors	This log is available when FreeIPA or 389ds is set up ( ie when enable_security_support is set to 'true')
CA Transaction Log	/var/log/pki/pki-tomcat/ca/transactions	FreeIPA PKI Transactions	This log is available when FreeIPA or 389ds is set up ( ie when enable_security_support is set to 'true')
KRB5KDC	/var/log/krb5kdc.log	KDC Utilization	This log is available when FreeIPA or 389ds is set up ( ie when enable_security_support is set to 'true')
Secure logs	/var/log/secure	Login Error Codes	This log is available when FreeIPA or 389ds is set up ( ie when enable_security_support is set to 'true')
HTTPD logs	/var/log/httpd/*	FreeIPA API Call	This log is available when FreeIPA or 389ds is set up ( ie when enable_security_support is set to 'true')
DNF logs	/var/log/dnf.log	Installation Logs	This log is configured on Rocky OS
Zypper Logs	/var/log/zypper.log	Installation Logs	This log is configured on Leap OS

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