infrastructure/ansible/roles/network/templates/rules.v4.j2

*filter
:INPUT DROP [0:0]
:FORWARD DROP [0:0]
:OUTPUT ACCEPT [0:0]

# Administration
-A INPUT -p tcp  --dport 22 -j ACCEPT

# Cluster
-A INPUT -s 192.168.1.254 -j ACCEPT
-A INPUT -s 82.253.205.190 -j ACCEPT
{% for selected_host in groups['cluster_nodes'] %}
-A INPUT -s {{ hostvars[selected_host]['public_ip'] }} -j ACCEPT
-A INPUT -s {{ hostvars[selected_host]['private_ip'] }} -j ACCEPT
{% endfor %}

# Local
-A INPUT -i docker0 -j ACCEPT
-A INPUT -s 127.0.0.1/8 -j ACCEPT
-A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
COMMIT

*nat
:PREROUTING ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
COMMIT

*mangle
:PREROUTING ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
COMMIT