infrastructure/os/config/roles/network/templates/rules.v4

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

# Internet Control Message Protocol
-A INPUT -p icmp -j ACCEPT

# Administration
-A INPUT -p tcp  --dport {{ ssh_port }} -j ACCEPT

# Diplonat needs everything open to communicate with IGD with the router
-A INPUT -s {{ gatewayv4 }} -j ACCEPT

# Cluster
{% for selected_host in groups['cluster_nodes'] %}
-A INPUT -s {{ hostvars[selected_host]['ipv4'] }} -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