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add iptables whitelist for DNS

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This commit is contained in:
Ryan Cavicchioni 2020-01-01 11:19:19 -06:00
parent f7273def95
commit 3b5c2242d1
Signed by: ryanc
GPG Key ID: 877EEDAF9245103D
2 changed files with 30 additions and 0 deletions
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15
roles/firewall/templates/ip6tables.j2
View File

@ -48,6 +48,13 @@
-A ICMP_FLOOD -j ACCEPT -A ICMP_FLOOD -j ACCEPT
{% endif %} {% endif %}
{% if firewall_dns_whitelist is defined %}
-N ACCEPT_DNS
-A ACCEPT_DNS -m tcp -p tcp --dport 53 -m comment --comment "accept dns 53/tcp6" -j LOG_ACCEPT
-A ACCEPT_DNS -m udp -p udp --dport 53 -m comment --comment "accept dns 53/udp6" -j LOG_ACCEPT
-A ACCEPT_DNS -m comment --comment "ACCEPT_DNS default drop inet6" -j LOG_DROP
{% endif %}
-A INPUT -i lo -m comment --comment "lo accept all inet6" -j ACCEPT -A INPUT -i lo -m comment --comment "lo accept all inet6" -j ACCEPT
{% if firewall_ssh_whitelist | length %} {% if firewall_ssh_whitelist | length %}
@ -60,6 +67,14 @@
-A INPUT -p tcp -m tcp --dport 22 -m set --match-set mgmt_v6 src -m comment --comment "accept mgmt ssh 22/tcp6" -j ACCEPT -A INPUT -p tcp -m tcp --dport 22 -m set --match-set mgmt_v6 src -m comment --comment "accept mgmt ssh 22/tcp6" -j ACCEPT
{% endif %} {% endif %}
{% if firewall_dns_whitelist is defined and
firewall_dns_whitelist | length %}
{% for ip in firewall_dns_whitelist | ipv6 %}
-A INPUT -m tcp -p tcp --dport 53 --source {{ ip }} -m comment --comment "accept {{ ip }} dns 53/tcp6" -j ACCEPT_DNS
-A INPUT -m udp -p udp --dport 53 --source {{ ip }} -m comment --comment "accept {{ ip }} dns 53/udp6" -j ACCEPT_DNS
{% endfor %}
{% endif %}
-A INPUT -m state --state INVALID -m comment --comment "drop invalid inet6" -j DROP -A INPUT -m state --state INVALID -m comment --comment "drop invalid inet6" -j DROP
{% if firewall_ipset_blacklist | length %} {% if firewall_ipset_blacklist | length %}

15
roles/firewall/templates/iptables.j2
View File

@ -48,6 +48,13 @@
-A ICMP_FLOOD -j ACCEPT -A ICMP_FLOOD -j ACCEPT
{% endif %} {% endif %}
{% if firewall_dns_whitelist is defined %}
-N ACCEPT_DNS
-A ACCEPT_DNS -m tcp -p tcp --dport 53 -m comment --comment "accept dns 53/tcp" -j LOG_ACCEPT
-A ACCEPT_DNS -m udp -p udp --dport 53 -m comment --comment "accept dns 53/udp" -j LOG_ACCEPT
-A ACCEPT_DNS -m comment --comment "ACCEPT_DNS default drop" -j LOG_DROP
{% endif %}
-A INPUT -i lo -m comment --comment "lo accept all" -j ACCEPT -A INPUT -i lo -m comment --comment "lo accept all" -j ACCEPT
{% if firewall_ssh_whitelist | length %} {% if firewall_ssh_whitelist | length %}
@ -60,6 +67,14 @@
-A INPUT -p tcp -m tcp --dport 22 -m set --match-set mgmt_v4 src -m comment --comment "accept mgmt ssh 22/tcp" -j ACCEPT -A INPUT -p tcp -m tcp --dport 22 -m set --match-set mgmt_v4 src -m comment --comment "accept mgmt ssh 22/tcp" -j ACCEPT
{% endif %} {% endif %}
{% if firewall_dns_whitelist is defined and
firewall_dns_whitelist | length %}
{% for ip in firewall_dns_whitelist | ipv4 %}
-A INPUT -m tcp -p tcp --dport 53 --source {{ ip }} -m comment --comment "accept {{ ip }} dns 53/tcp" -j ACCEPT_DNS
-A INPUT -m udp -p udp --dport 53 --source {{ ip }} -m comment --comment "accept {{ ip }} dns 53/udp" -j ACCEPT_DNS
{% endfor %}
{% endif %}
-A INPUT -m state --state INVALID -m comment --comment "drop invalid" -j DROP -A INPUT -m state --state INVALID -m comment --comment "drop invalid" -j DROP
{% if firewall_ipset_blacklist | length %} {% if firewall_ipset_blacklist | length %}