bastion update

ansible/roles/bastion/defaults/main.yml

@@ -0,0 +1,43 @@
+# Password aging settings
+os_auth_pw_max_age: 90
+os_auth_pw_min_age: 1
+os_auth_pw_warn_age: 7
+passhistory: 2
+
+# Inactivity and Failed attempts lockout settings
+fail_deny: 5
+fail_unlock: 0
+inactive_lock: 0
+shell_timeout: 300
+
+# tally settings
+onerr: 'fail'
+deny: 5
+unlock_time: 300
+
+# Password complexity settings
+pwquality_minlen: 9
+pwquality_maxrepeat: 3
+pwquality_lcredit: -1
+pwquality_ucredit: -1
+pwquality_dcredit: -1
+pwquality_ocredit: -1
+
+# SSH settings
+sshrootlogin: 'yes'
+sshmainport: 22
+ssh_service_name: sshd
+
+# Crictl setup
+crictl_app: crictl
+crictl_version: 1.25.0
+crictl_os: linux
+crictl_arch: amd64
+crictl_dl_url: https://github.com/kubernetes-sigs/cri-tools/releases/download/v{{ crictl_version }}/{{ crictl_app }}-v{{ crictl_version }}-{{ crictl_os }}-{{ crictl_arch }}.tar.gz
+crictl_bin_path: /usr/local/bin
+crictl_file_owner: root
+crictl_file_group: root
+
+# temp
+username: root
+password: saasadmin1234

ansible/roles/bastion/files/login_banner

@@ -0,0 +1,20 @@
+#!/bin/sh
+printf '''
+  |-----------------------------------------------------------------|
+  | This system is for the use of authorized users only.            |
+  | Individuals using this computer system without authority, or in |
+  | excess of their authority, are subject to having all of their   |
+  | activities on this system monitored and recorded by system      |
+  | personnel.                                                      |
+  |                                                                 |
+  | In the course of monitoring individuals improperly using this   |
+  | system, or in the course of system maintenance, the activities  |
+  | of authorized users may also be monitored.                      |
+  |                                                                 |
+  | Anyone using this system expressly consents to such monitoring  |
+  | and is advised that if such monitoring reveals possible         |
+  | evidence of criminal activity, system personnel may provide the |
+  | evidence of such monitoring to law enforcement officials.       |
+  |-----------------------------------------------------------------|
+'''
+

ansible/roles/bastion/handlers/main.yml

@@ -0,0 +1,6 @@
+---
+- name: restart sshd
+  service:
+    name: "{{ ssh_service_name }}"
+    state: restarted
+    enabled: true

ansible/roles/bastion/tasks/admin_set.yml

@@ -0,0 +1,7 @@
+---
+- name: user change
+  user:
+    name: "{{ username }}"
+    password: "{{ password | password_hash('sha512') }}"
+    state: present
+

ansible/roles/bastion/tasks/banner.yml

@@ -0,0 +1,29 @@
+---
+- name: Create a tar.gz archive of a single file.
+  archive:
+    path: /etc/update-motd.d/*
+    dest: /etc/update-motd.d/motd.tar.gz
+    format: gz
+    force_archive: true
+
+- name: remove a motd.d files
+  file:
+    path: /etc/update-motd.d/{{ item }}
+    state: absent
+  with_items:
+    - 10-help-text
+    - 85-fwupd
+    - 90-updates-available
+    - 91-release-upgrade
+    - 95-hwe-eol
+    - 98-fsck-at-reboot
+    - 50-motd-news
+    - 88-esm-announce
+
+- name: Create login banner
+  copy:
+    src: login_banner
+    dest: /etc/update-motd.d/00-header
+    owner: root
+    group: root
+    mode: 0755

ansible/roles/bastion/tasks/crictl.yml

@@ -0,0 +1,19 @@
+---
+- name: Downloading and extracting {{ crictl_app }} {{ crictl_version }}
+  unarchive:
+    src: "{{ crictl_dl_url }}"
+    dest: "{{ crictl_bin_path }}"
+    owner: "{{ crictl_file_owner }}"
+    group: "{{ crictl_file_group }}"
+    extra_opts:
+      - crictl
+    remote_src: yes
+
+- name: Crictl command crontab setting
+  ansible.builtin.cron:
+    name: crontab command
+    minute: "0"
+    hour: "3"
+    user: root
+    job: "/usr/local/bin/crictl rmi --prune"
+ 

ansible/roles/bastion/tasks/login_defs.yml

@@ -0,0 +1,48 @@
+---
+- name: Set pass max days
+  lineinfile:
+    dest: /etc/login.defs
+    state: present
+    regexp: '^PASS_MAX_DAYS.*$'
+    line: "PASS_MAX_DAYS\t{{os_auth_pw_max_age}}"
+    backrefs: yes
+
+- name: Set pass min days
+  lineinfile:
+    dest: /etc/login.defs
+    state: present
+    regexp: '^PASS_MIN_DAYS.*$'
+    line: "PASS_MIN_DAYS\t{{os_auth_pw_min_age}}"
+    backrefs: yes
+
+- name: Set pass min length
+  lineinfile:
+    dest: /etc/login.defs
+    state: present
+    regexp: '^PASS_MIN_LEN.*$'
+    line: "PASS_MIN_LEN\t{{pwquality_minlen}}"
+    backrefs: yes
+
+- name: Set pass warn days
+  lineinfile:
+    dest: /etc/login.defs
+    state: present
+    regexp: '^PASS_WARN_AGE.*$'
+    line: "PASS_WARN_AGE\t{{os_auth_pw_warn_age}}"
+    backrefs: yes
+
+- name: Set password encryption to SHA512
+  lineinfile:
+    dest: /etc/login.defs
+    state: present
+    regexp: '^ENCRYPT_METHOD\s.*$'
+    line: "ENCRYPT_METHOD\tSHA512"
+    backrefs: yes
+
+- name: Disable MD5 crypt explicitly
+  lineinfile:
+    dest: /etc/login.defs
+    state: present
+    regexp: '^MD5_CRYPT_ENAB.*$'
+    line: "MD5_CRYPT_ENAB NO"
+    backrefs: yes

ansible/roles/bastion/tasks/main.yml

@@ -0,0 +1,24 @@
+---
+- include: login_defs.yml
+  tags: login_defs
+
+- include: pam.yml
+  tags: pam
+
+- include: sshd_config.yml
+  tags: sshd_config
+
+- include: sudoers.yml
+  tags: sudoers
+
+- include: profile.yml
+  tags: profile
+
+- include: banner.yml
+  tags: banner
+
+- include: crictl.yml
+  tags: crictl
+
+- include: admin_set.yml
+  tags: admin_set

ansible/roles/bastion/tasks/pam.yml

@@ -0,0 +1,50 @@
+---
+- name: Add pam_tally2.so 
+  template:
+    src: common-auth.j2
+    dest: /etc/pam.d/common-auth
+    owner: root
+    group: root
+    mode: 0644
+
+- name: Create pwquality.conf password complexity configuration
+  block:
+    - apt:
+        name: libpam-pwquality
+        state: present
+        install_recommends: false
+    - template:
+        src: pwquality.conf.j2
+        dest: /etc/security/pwquality.conf
+        owner: root
+        group: root
+        mode: 0644
+
+- name: Add pam_tally2.so
+  block:
+    - lineinfile:
+        dest: /etc/pam.d/common-account
+        regexp: '^account\srequisite'
+        line: "account requisite pam_deny.so"
+
+    - lineinfile:
+        dest: /etc/pam.d/common-account
+        regexp: '^account\srequired'
+        line: "account required pam_tally2.so"
+
+- name: password reuse is limited
+  lineinfile:
+    dest: /etc/pam.d/common-password
+    line: "password required pam_pwhistory.so remember=5"
+
+- name: password hashing algorithm is SHA-512
+  lineinfile:
+    dest: /etc/pam.d/common-password
+    regexp: '^password\s+\[success'
+    line: "password [success=1 default=ignore] pam_unix.so sha512"
+
+- name: Shadow Password Suite Parameters
+  lineinfile:
+    dest: /etc/pam.d/common-password
+    regexp: '^password\s+\[success'
+    line: "password [success=1 default=ignore] pam_unix.so sha512"

ansible/roles/bastion/tasks/profile.yml

@@ -0,0 +1,24 @@
+---
+- name: Set session timeout
+  lineinfile:
+    dest: /etc/profile
+    regexp: '^TMOUT=.*'
+    insertbefore: '^readonly TMOUT'
+    line: 'TMOUT={{shell_timeout}}'
+    state: "{{ 'absent' if (shell_timeout == 0) else 'present' }}"
+
+- name: Set TMOUT readonly
+  lineinfile:
+    dest: /etc/profile
+    regexp: '^readonly TMOUT'
+    insertafter: 'TMOUT={{shell_timeout}}'
+    line: 'readonly TMOUT'
+    state: "{{ 'absent' if (shell_timeout == 0) else 'present' }}"
+
+- name: Set export TMOUT
+  lineinfile:
+    dest: /etc/profile
+    regexp: '^export TMOUT.*'
+    insertafter: 'readonly TMOUT'
+    line: 'export TMOUT'
+    state: "{{ 'absent' if (shell_timeout == 0) else 'present' }}"

ansible/roles/bastion/tasks/sshd_config.yml

@@ -0,0 +1,30 @@
+---
+- name: Configure ssh root login to {{sshrootlogin}}
+  lineinfile:
+    dest: /etc/ssh/sshd_config
+    regexp: '^(#)?PermitRootLogin.*'
+    line: 'PermitRootLogin {{sshrootlogin}}'
+    insertbefore: '^Match.*'
+    state: present
+    owner: root
+    group: root
+    mode: 0640
+  notify: restart sshd
+
+- name: SSH Listen on Main Port
+  lineinfile:
+    dest: /etc/ssh/sshd_config
+    insertbefore: '^#*AddressFamily'
+    line: 'Port {{sshmainport}}'
+    state: present
+    owner: root
+    group: root
+    mode: 0640
+  notify: restart sshd
+
+- name: "Setting sshd allow users"
+  template:
+    src: allow_users.j2
+    dest: "/etc/ssh/sshd_config.d/allow_users.conf"
+  notify: restart sshd
+    

ansible/roles/bastion/tasks/sudoers.yml

@@ -0,0 +1,95 @@
+---
+- name: "Create devops group"
+  ansible.builtin.group:
+    name: "devops"
+    state: present
+
+- name: "get current users"
+  shell: "cat /etc/passwd | egrep -iv '(false|nologin|sync|root)' | awk -F: '{print $1}'"
+  register: deleting_users
+
+- name: "Delete users"
+  ansible.builtin.user:
+    name: "{{ item }}"
+    state: absent
+    remove: yes
+  with_items: "{{ deleting_users.stdout_lines }}"
+  when: item != ansible_user
+  ignore_errors: true
+    
+
+- name: "Create admin user"
+  ansible.builtin.user:
+    name: "{{ item.name }}"
+    group: "devops"
+    shell: "/bin/bash"
+    system: yes
+    state: present
+  with_items: "{{ admin_users }}"
+  when: 
+  - item.name is defined
+  - item.key is defined
+  ignore_errors: true
+
+- name: user change
+  user:
+    name: "{{ item.name }}"
+    password: "{{ password | password_hash('sha512') }}"
+    state: present
+  with_items: "{{ admin_users }}"
+  when: 
+  - item.name is defined 
+  - item.key is defined
+  ignore_errors: true
+
+- name: key add
+  authorized_key:
+    user: "{{ item.name  }}"
+    state: present
+    key: "{{ item.key }}"
+  with_items: "{{ admin_users }}"
+  when: 
+  - item.name is defined
+  - item.key is defined
+  ignore_errors: true
+
+
+- name: "Create common user"
+  ansible.builtin.user:
+    name: "{{ item.name }}"
+    group: "users"
+    shell: "/bin/bash"
+    system: yes
+    state: present
+  with_items: "{{ allow_users }}"
+  when: 
+  - item.name is defined 
+  - item.key is defined
+  ignore_errors: true
+
+- name: user change
+  user:
+    name: "{{ item.name }}"
+    password: "{{ password | password_hash('sha512') }}"
+    state: present
+  with_items: "{{ allow_users }}"
+  when: 
+  - item.name is defined 
+  - item.key is defined
+  ignore_errors: true
+
+- name: key add
+  authorized_key:
+    user: "{{ item.name  }}"
+    state: present
+    key: "{{ item.key }}"
+  with_items: "{{ allow_users }}"
+  when:
+  - item.name is defined
+  - item.key is defined
+  ignore_errors: true
+
+- name: "Setting sudoers allow users"
+  template:
+    src: sudoers_users.j2
+    dest: "/etc/sudoers.d/sudoers_users"

ansible/roles/bastion/templates/allow_users.j2

@@ -0,0 +1,10 @@
+{% if admin_users is defined %}
+{% for user in admin_users %}
+AllowUsers {{ user.name }}@{{ user.ip }} 
+{% endfor %}
+{% endif %}
+{% if allow_users is defined %}
+{% for user in allow_users %}
+AllowUsers {{ user.name }}@{{ user.ip }} 
+{% endfor %}
+{% endif %}

ansible/roles/bastion/templates/common-auth.j2

@@ -0,0 +1,27 @@
+#
+# /etc/pam.d/common-auth - authentication settings common to all services
+#
+# This file is included from other service-specific PAM config files,
+# and should contain a list of the authentication modules that define
+# the central authentication scheme for use on the system
+# (e.g., /etc/shadow, LDAP, Kerberos, etc.).  The default is to use the
+# traditional Unix authentication mechanisms.
+#
+# As of pam 1.0.1-6, this file is managed by pam-auth-update by default.
+# To take advantage of this, it is recommended that you configure any
+# local modules either before or after the default block, and use
+# pam-auth-update to manage selection of other modules.  See
+# pam-auth-update(8) for details.
+auth	required			pam_tally2.so onerr={{onerr}} even_deny_root deny={{deny}} unlock_time={{unlock_time}}
+
+# here are the per-package modules (the "Primary" block)
+auth    [success=1 default=ignore]      pam_unix.so nullok
+# here's the fallback if no module succeeds
+auth    requisite                       pam_deny.so
+# prime the stack with a positive return value if there isn't one already;
+# this avoids us returning an error just because nothing sets a success code
+auth    required                        pam_permit.so
+# since the modules above will each just jump around
+# and here are more per-package modules (the "Additional" block)
+auth    optional                        pam_cap.so
+# end of pam-auth-update config

ansible/roles/bastion/templates/pwquality.conf.j2

@@ -0,0 +1,50 @@
+# Configuration for systemwide password quality limits
+# Defaults:
+#
+# Number of characters in the new password that must not be present in the
+# old password.
+# difok = 5
+#
+# Minimum acceptable size for the new password (plus one if
+# credits are not disabled which is the default). (See pam_cracklib manual.)
+# Cannot be set to lower value than 6.
+minlen = {{pwquality_minlen}}
+#
+# The maximum credit for having digits in the new password. If less than 0
+# it is the minimum number of digits in the new password.
+dcredit = {{pwquality_dcredit}}
+#
+# The maximum credit for having uppercase characters in the new password.
+# If less than 0 it is the minimum number of uppercase characters in the new
+# password.
+ucredit = {{pwquality_ucredit}}
+#
+# The maximum credit for having lowercase characters in the new password.
+# If less than 0 it is the minimum number of lowercase characters in the new
+# password.
+lcredit = {{pwquality_lcredit}}
+#
+# The maximum credit for having other characters in the new password.
+# If less than 0 it is the minimum number of other characters in the new
+# password.
+ocredit = {{pwquality_ocredit}}
+#
+# The minimum number of required classes of characters for the new
+# password (digits, uppercase, lowercase, others).
+# minclass = 0
+#
+# The maximum number of allowed consecutive same characters in the new password.
+# The check is disabled if the value is 0.
+maxrepeat = {{pwquality_maxrepeat}}
+#
+# The maximum number of allowed consecutive characters of the same class in the
+# new password.
+# The check is disabled if the value is 0.
+# maxclassrepeat = 0
+#
+# Whether to check for the words from the passwd entry GECOS string of the user.
+# The check is enabled if the value is not 0.
+# gecoscheck = 0
+#
+# Path to the cracklib dictionaries. Default is to use the cracklib default.
+# dictpath =

ansible/roles/bastion/templates/sudoers_users.j2

@@ -0,0 +1,5 @@
+{% if allow_users is defined %}
+{% for user in admin_users %}
+{{ user.name }} ALL=(ALL) NOPASSWD: ALL
+{% endfor %}
+{% endif %}