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https://github.com/ansible-lockdown/RHEL9-CIS.git
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updated netwokr sysctl rules
Signed-off-by: Mark Bolwell <mark.bollyuk@gmail.com>
This commit is contained in:
Mark Bolwell
parent
42410b4cd0
commit
e043274c34
2 changed files with 186 additions and 31 deletions
155
tasks/section_3/cis_3.3.x.yml
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155
tasks/section_3/cis_3.3.x.yml
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---
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- name: "3.2.1 | L1 | PATCH | Ensure source routed packets are not accepted"
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block:
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- name: "3.2.1 | L1 | PATCH | Ensure source routed packets are not accepted"
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debug:
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msg: "Control being set via Handler 'update sysctl' which writes to /etc/sysctl.d/99-sysctl.conf"
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notify:
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- update sysctl
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- sysctl flush ipv4 route table
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- name: "3.2.1 | L1 | PATCH | Ensure source routed packets are not accepted"
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debug:
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msg: "Control being set via Handler 'update sysctl' which writes to /etc/sysctl.d/99-sysctl.conf"
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notify:
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- sysctl flush ipv6 route table
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- update sysctl
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when: rhel9cis_ipv6_required
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when:
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- rhel9cis_rule_3_2_1
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tags:
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- level1-server
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- level1-workstation
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- sysctl
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- patch
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- rule_3.2.1
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- name: "3.2.2 | L1 | PATCH | Ensure ICMP redirects are not accepted"
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block:
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- name: "3.2.2 | L1 | PATCH | Ensure ICMP redirects are not accepted"
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debug:
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msg: "Control being set via Handler 'update sysctl' which writes to /etc/sysctl.d/99-sysctl.conf"
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notify:
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- update sysctl
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- sysctl flush ipv4 route table
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- name: "3.2.2 | L1 | PATCH | Ensure ICMP redirects are not accepted"
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debug:
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msg: "Control being set via Handler 'update sysctl' which writes to /etc/sysctl.d/99-sysctl.conf"
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notify:
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- sysctl flush ipv6 route table
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- update sysctl
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when: rhel9cis_ipv6_required
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when:
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- rhel9cis_rule_3_2_2
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tags:
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- level1-server
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- level1-workstation
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- sysctl
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- patch
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- rule_3.2.2
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- name: "3.2.3 | L1 | PATCH | Ensure secure ICMP redirects are not accepted"
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debug:
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msg: "Control being set via Handler 'update sysctl' which writes to /etc/sysctl.d/99-sysctl.conf"
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notify: update sysctl
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when:
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- rhel9cis_rule_3_2_3
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tags:
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- level1-server
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- level1-workstation
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- sysctl
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- patch
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- rule_3.2.3
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- name: "3.2.4 | L1 | PATCH | Ensure suspicious packets are logged"
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debug:
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msg: "Control being set via Handler 'update sysctl' which writes to /etc/sysctl.d/99-sysctl.conf"
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notify: update sysctl
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when:
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- rhel9cis_rule_3_2_4
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tags:
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- level1-server
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- level1-workstation
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- sysctl
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- patch
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- rule_3.2.4
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- name: "3.2.5 | L1 | PATCH | Ensure broadcast ICMP requests are ignored"
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debug:
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msg: "Control being set via Handler 'update sysctl' which writes to /etc/sysctl.d/99-sysctl.conf"
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notify: update sysctl
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when:
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- rhel9cis_rule_3_2_5
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tags:
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- level1-server
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- level1-workstation
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- sysctl
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- patch
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- rule_3.2.5
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- name: "3.2.6 | L1 | PATCH | Ensure bogus ICMP responses are ignored"
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debug:
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msg: "Control being set via Handler 'update sysctl' which writes to /etc/sysctl.d/99-sysctl.conf"
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notify: update sysctl
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when:
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- rhel9cis_rule_3_2_6
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tags:
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- level1-server
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- level1-workstation
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- sysctl
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- patch
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- rule_3.2.6
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- name: "3.2.7 | L1 | PATCH | Ensure Reverse Path Filtering is enabled"
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debug:
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msg: "Control being set via Handler 'update sysctl' which writes to /etc/sysctl.d/99-sysctl.conf"
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notify: update sysctl
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when:
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- rhel9cis_rule_3_2_7
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tags:
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- level1-server
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- level1-workstation
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- sysctl
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- patch
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- rule_3.2.7
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- name: "3.2.8 | L1 | PATCH | Ensure TCP SYN Cookies is enabled"
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debug:
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msg: "Control being set via Handler 'update sysctl' which writes to /etc/sysctl.d/99-sysctl.conf"
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notify: update sysctl
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when:
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- rhel9cis_rule_3_2_8
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tags:
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- level1-server
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- level1-workstation
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- sysctl
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- patch
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- rule_3.2.8
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- name: "3.2.9 | L2 | PATCH | Ensure IPv6 router advertisements are not accepted"
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block:
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- name: "3.2.9 | L2 | PATCH | Ensure IPv6 router advertisements are not accepted"
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debug:
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msg: "Control being set via Handler 'update sysctl' which writes to /etc/sysctl.d/99-sysctl.conf"
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notify:
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- update sysctl
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- sysctl flush ipv4 route table
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- name: "3.2.9 | L2 | PATCH | Ensure IPv6 router advertisements are not accepted"
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debug:
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msg: "Control being set via Handler 'update sysctl' which writes to /etc/sysctl.d/99-sysctl.conf"
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notify:
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- sysctl flush ipv6 route table
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- update sysctl
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when: rhel9cis_ipv6_required
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when:
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- rhel9cis_ipv6_required
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- rhel9cis_rule_3_2_9
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tags:
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- level2-server
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- level2-workstation
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- sysctl
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- patch
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- rule_3.2.9
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@ -12,64 +12,64 @@ kernel.randomize_va_space = 2
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{% endif %}
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# Network sysctl
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{% if rhel9cis_rule_3_1_1 %}
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# CIS 3.1.1
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net.ipv4.ip_forward = 0
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{% if rhel9cis_rule_3_1_1 and rhel9cis_ipv6_required %}
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net.ipv6.conf.all.forwarding = 0
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{% endif %}
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{% endif %}
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{% if rhel9cis_rule_3_1_2 %}
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# CIS 3.1.2
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net.ipv4.conf.all.send_redirects = 0
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net.ipv4.conf.default.send_redirects = 0
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{% endif %}
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{% if rhel9cis_rule_3_2_1 %}
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# CIS 3.2.1
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net.ipv4.conf.all.accept_source_route = 0
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net.ipv4.conf.default.accept_source_route = 0
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net.ipv4.ip_forward = 0
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{% if rhel9cis_rule_3_2_1 and rhel9cis_ipv6_required %}
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net.ipv6.conf.all.accept_source_route = 0
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net.ipv6.conf.default.accept_source_route = 0
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net.ipv6.conf.all.forwarding = 0
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{% endif %}
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{% endif %}
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{% if rhel9cis_rule_3_2_2 %}
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# CIS 3.2.2
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net.ipv4.conf.all.send_redirects = 0
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net.ipv4.conf.default.send_redirects = 0
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{% endif %}
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{% if rhel9cis_rule_3_3_1 %}
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# CIS 3.3.1
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net.ipv4.conf.all.accept_source_route = 0
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net.ipv4.conf.default.accept_source_route = 0
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{% if rhel9cis_rule_3_3_1 and rhel9cis_ipv6_required %}
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net.ipv6.conf.all.accept_source_route = 0
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net.ipv6.conf.default.accept_source_route = 0
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{% endif %}
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{% endif %}
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{% if rhel9cis_rule_3_3_2 %}
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# CIS 3.3.2
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net.ipv4.conf.all.accept_redirects = 0
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net.ipv4.conf.default.accept_redirects = 0
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{% if rhel9cis_rule_3_2_2 and rhel9cis_ipv6_required %}
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{% if rhel9cis_rule_3_3_2 and rhel9cis_ipv6_required %}
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net.ipv6.conf.all.accept_redirects = 0
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net.ipv6.conf.default.accept_redirects = 0
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{% endif %}
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{% endif %}
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{% if rhel9cis_rule_3_2_3 %}
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# CIS 3.2.3
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{% if rhel9cis_rule_3_3_3 %}
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# CIS 3.3.3
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net.ipv4.conf.all.secure_redirects = 0
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net.ipv4.conf.default.secure_redirects = 0
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{% endif %}
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{% if rhel9cis_rule_3_2_4 %}
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# CIS 3.2.4
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{% if rhel9cis_rule_3_3_4 %}
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# CIS 3.3.4
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net.ipv4.conf.all.log_martians = 1
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net.ipv4.conf.default.log_martians = 1
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{% endif %}
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{% if rhel9cis_rule_3_2_5 %}
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# CIS 3.2.5
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{% if rhel9cis_rule_3_3_5 %}
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# CIS 3.3.5
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net.ipv4.icmp_echo_ignore_broadcasts = 1
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{% endif %}
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{% if rhel9cis_rule_3_2_6 %}
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# CIS 3.2.6
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{% if rhel9cis_rule_3_3_6 %}
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# CIS 3.3.6
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net.ipv4.icmp_ignore_bogus_error_responses = 1
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{% endif %}
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{% if rhel9cis_rule_3_2_7 %}
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# CIS 3.2.7
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{% if rhel9cis_rule_3_3_7 %}
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# CIS 3.3.7
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net.ipv4.conf.default.rp_filter = 1
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{% endif %}
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{% if rhel9cis_rule_3_2_8 %}
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# CIS 3.2.8
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{% if rhel9cis_rule_3_3_8 %}
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# CIS 3.3.8
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net.ipv4.tcp_syncookies = 1
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{% endif %}
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{% if rhel9cis_rule_3_2_9 %}
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# CIS 3.2.9
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{% if rhel9cis_rule_3_3_9 %}
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# CIS 3.3.9
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net.ipv6.conf.all.accept_ra = 0
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net.ipv6.conf.default.accept_ra = 0
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{% endif %}
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