ffmyk-ansible/roles/configure_iptables/templates/iptables.rules

*mangle
:PREROUTING ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
{% if 'fastd' in group_names %}
{% for site in sites %}
-A PREROUTING -i bat{{ site.name }} -j MARK --set-xmark 0x1/0xffffffff
{% endfor %}
{% endif %}

{% if 'fastd' in group_names %}
{% for peer in groups['uplink'] %}
-A PREROUTING -i bb{{ hostvars[peer]['wireguard_bb_name'] }} -j MARK --set-xmark 0x1/0xffffffff
{% endfor %}
{% endif %}
{% if 'uplink' in group_names %}
{% for peer in groups['fastd'] %}
-A PREROUTING -i bb{{ hostvars[peer]['wireguard_bb_name'] }} -j MARK --set-xmark 0x1/0xffffffff
{% endfor %}
{% for peer in groups['uplink'] | difference([inventory_hostname]) %}
-A PREROUTING -i bb{{ hostvars[peer]['wireguard_bb_name'] }} -j MARK --set-xmark 0x1/0xffffffff
{% endfor %}
{% endif %}
COMMIT
*filter
:INPUT DROP [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -s 127.0.0.1/32 -j ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT

# SSH-Server
-A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
# nginx
-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
# iperf3
-A INPUT -p tcp -m tcp -s 10.222.0.0/16 --dport 5201 -j ACCEPT

{% if 'fastd' in group_names %}
# dns
-A INPUT -p tcp -m tcp --dport 53 -j ACCEPT
-A INPUT -p udp -m udp --dport 53 -j ACCEPT
#dhcp
{% for site in sites %}
-I INPUT -i bat{{ site.name }} -p udp --dport 67:68 --sport 67:68 -j ACCEPT
{% endfor %}
# ntp
-A INPUT -p udp -m udp --dport 123 -j ACCEPT
# fastd
-A INPUT -s 10.222.0.0/16 -p udp -m udp --dport 10010:10021 -j DROP
-A INPUT -p udp -m udp --dport 10010:10021 -j ACCEPT
{% endif %}
# MOSH
-A INPUT -p udp -m udp --dport 60000:61000 -j ACCEPT

{% if 'ffrl_uplink' in group_names %}
# ffrl-gre
{% for peer in ffrl_peers %}
-A INPUT -p gre -s {{ peer.remote }} -j ACCEPT
{% endfor %}
# ffrl bgp
{% for peer in ffrl_peers %}
-A INPUT -i {{ peer.name }} -p tcp -m tcp --dport 179 -j ACCEPT
{% endfor %}
{% endif %}

-A INPUT -m limit --limit 2/min -j LOG --log-prefix "IPTables-Dropped input: " --log-level 4

{% if 'fastd' in group_names %}
{% for site in sites %}
-A FORWARD -i bat{{ site.name }} -p udp --dport 10010:10021 -j REJECT
{% endfor %}
{% endif %}
-A FORWARD -o {{ ansible_default_ipv4.interface }} -j REJECT
-A FORWARD -d 10.222.0.0/16 -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
-A FORWARD -s 10.222.0.0/16 -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu

COMMIT
*nat
:PREROUTING ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
{% if 'ffrl_uplink' in group_names %}
{% for peer in ffrl_peers %}
-A POSTROUTING ! -s {{ ffrl_ip4 }} -o {{ peer.name }} -j SNAT --to-source {{ ffrl_ip4 }}
{% endfor %}
{% endif %}
{% if 'mullvad_uplink' in group_names %}
-A POSTROUTING -o mullvad -j MASQUERADE
{% endif %}
COMMIT