Nessus (System Health Client)

This Role installs the Nessus System Health Client and links it to the ETH Monitoring System

General

This Role fullfills the following steps:

• Check if Nessus Systemhealth Client is already installed

  - name: "Check if Nessus Agent is already installed"
    stat:
      path: /opt/nessus_agent/
    register: nessusfolder

• Stop execution of Role when Nessus System Health is already installed

  - name: "Stop Playbook when Nessus Agent is already installed"
    ansible.builtin.meta: end_play
    when: nessusfolder.stat.exists == true

• Create the local Target Directory for download of .deb Package

  - name: "Create Destination Directory"
    file:
      path: /usr/local/nessus/
      state: directory
      mode: '0755'

• Download .deb package of Nessus System Health Client

  - name: "Download .deb package from Seed Server"
    get_url:
      url: https://seed.s4d.ethz.ch/payload/common/noble/nessus/NessusAgent10.3.2.deb
      dest: /usr/local/nessus/NessusAgent10.3.2.deb
      mode: 0644
    when:  nessusfolder.stat.exists == false
    become: true

• Install Nessus System Health Client

  - name: "Install Nessus Agent on target system"
    shell: dpkg -i /usr/local/nessus/NessusAgent10.3.2.deb
    when: nessusfolder.stat.exists == false
    become: true

• Start Service

  - name: "Start Nessus Service"
    shell: /bin/systemctl start nessusagent.service
    when: nessusfolder.stat.exists == false
    become: true

• Link Nessus System Health with ETH Environment (daily)

  - name: "Apply ETH Config for Nessus Agent"
    shell: /opt/nessus_agent/sbin/nessuscli agent link --host=vcnc-prd-01.ethz.ch --port=8834 --key=9a36735bbd7bc76b035f3c7a9fa3fe43cc7b579d889d09a50dd0016f40172cf3 --groups=clt-daily-11h
    when: nessusfolder.stat.exists == false
    become: true
    when: nessus_schedule == "daily"

• Link Nessus System Health with ETH Environment (weekly)

  - name: "Apply ETH Config for Nessus Agent"
    shell: /opt/nessus_agent/sbin/nessuscli agent link --host=vcnc-prd-01.ethz.ch --port=8834 --key=9a36735bbd7bc76b035f3c7a9fa3fe43cc7b579d889d09a50dd0016f40172cf3 --groups=clt-wkly-we-15h
    when: nessusfolder.stat.exists == false
    become: true
    when: nessus_schedule == "weekly"

• Check if Installation was successfull

  - name: "Check if Installation was successfull"
    debug:
      msg: "Nessus Agent 10.3.2 was successfully installed"
    when: nessusfolder_new.stat.exists

Dependencies

Role Dependencies

None

Package Dependencies

None

Role Variables

Name	Type	Default value	Purpose	Comment	Role
nessus_conf	Boolean	false	If this variable is set to true in the inventory file, Ansible will run the role Has to be defined in hosts file	Possible values: true: enables role false: disables role	noble_nessus
nessus_schedule	string	-	Defines the schedule of the System Health Check	Possible values: daily: Define a daily schedule for Client-Health check. weekly: Define a weekly schedule for Client-Health check.	noble_nessus
nessus_key	string	String can be found in our wiki	Contains the Serialkey for Tenable Nessus Client Should be defined in group_vars!	-	noble_nessus

Example Playbook

Including an example of how to use your role (for instance, with variables passed in as parameters) is always nice for users too:

---
- hosts: all
  roles:
  - noble_nessus

Example Inventory/hosts

COMPUTERNAME:
  mac_address: aa-bb-cc-dd-ee-ff
  nessus_conf: true
  nessus_schedule: daily

Standalone Playbook

• do_noble_nessus

License

BSD

Author Information

Maintainer:
Sandro Romagnoli

Support-Contact:
s4d-linux-support@id.ethz.ch

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