ansible/roles/firewall/templates/ip6tables.j2

*filter
:INPUT {{ firewall_iptables_input_policy_v6 }}
:FORWARD {{ firewall_iptables_forward_policy_v6 }}
:OUTPUT {{ firewall_iptables_output_policy_v6 }}

-N LOG_ACCEPT
-A LOG_ACCEPT -m limit --limit {{ firewall_log_limit }} --limit-burst {{ firewall_log_limit_burst }} -j LOG --log-prefix "[iptables ACCEPT] " --log-level info
-A LOG_ACCEPT -j ACCEPT

-N LOG_DROP
-A LOG_DROP -m limit --limit {{ firewall_log_limit }} --limit-burst {{ firewall_log_limit_burst }} -j LOG --log-prefix "[iptables DROP] " --log-level info
-A LOG_DROP -p tcp -m tcp -m comment --comment "reject tcp6" -j REJECT --reject-with tcp-reset
-A LOG_DROP -p udp -m udp -m comment --comment "drop udp6" -j DROP
-A LOG_DROP -m comment --comment "reject all inet6" -j REJECT --reject-with icmp6-adm-prohibited

{% if firewall_limit_ssh %}
-N LIMIT_SSH
-A LIMIT_SSH -m recent --set --name SSH --rsource
-A LIMIT_SSH -m recent --update --seconds {{ firewall_limit_ssh_seconds }} --hitcount {{ firewall_limit_ssh_hitcount }} --name SSH --rsource -m limit --limit {{ firewall_log_limit }} --limit-burst {{ firewall_log_limit_burst }} -j LOG --log-prefix "[iptables SSH BRUTE] " --log-level info
-A LIMIT_SSH -p tcp -m tcp -m recent --update --seconds {{ firewall_limit_ssh_seconds }} --hitcount {{ firewall_limit_ssh_hitcount}} --name SSH --rsource -m comment --comment "rate limit ssh 22/tcp6" -j REJECT --reject-with tcp-reset
-A LIMIT_SSH -j ACCEPT
{% endif %}

{% if firewall_drop_icmp_flood %}
-N ICMP_FLOOD
-A ICMP_FLOOD -m recent --set --name ICMP --rsource
-A ICMP_FLOOD -m recent --update --seconds {{ firewall_limit_icmp_flood_seconds }} --hitcount {{ firewall_limit_icmp_flood_hitcount }} --name ICMP --rsource --rttl -m limit --limit {{ firewall_log_limit }} --limit-burst {{ firewall_log_limit_burst }} -j LOG --log-prefix "[iptables ICMP FLOOD] " --log-level info
-A ICMP_FLOOD -m recent --update --seconds {{ firewall_limit_icmp_flood_seconds }} --hitcount {{ firewall_limit_icmp_flood_hitcount }} --name ICMP --rsource --rttl -m comment --comment "drop icmpv6 flood" -j REJECT --reject-with icmp6-adm-prohibited
-A ICMP_FLOOD -j ACCEPT
{% endif %}

-A INPUT -i lo -m comment --comment "lo accept all inet6" -j ACCEPT

-A INPUT -m state --state INVALID -m comment --comment "drop invalid inet6" -j DROP

{% if firewall_ipset_mgmt.v6 is defined %}
-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 %}

{% if firewall_ipset_blacklist.v6 is defined %}
-A INPUT -m set --match-set mgmt_v6 src -m comment --comment "drop blacklist inet6" -j LOG_DROP
{% endif %}

-A INPUT -s fe80::/10 -p icmpv6 -m icmpv6 --icmpv6-type 130 -m comment --comment "accept icmpv6 130" -j ACCEPT
-A INPUT -s fe80::/10 -p icmpv6 -m icmpv6 --icmpv6-type 131 -m comment --comment "accept icmpv6 131" -j ACCEPT
-A INPUT -s fe80::/10 -p icmpv6 -m icmpv6 --icmpv6-type 132 -m comment --comment "accept icmpv6 132" -j ACCEPT
-A INPUT -s fe80::/10 -p icmpv6 -m icmpv6 --icmpv6-type 143 -m comment --comment "accept icmpv6 143" -j ACCEPT
-A INPUT -s fe80::/10 -p icmpv6 -m icmpv6 --icmpv6-type 151 -m hl --hl-eq 1 -m comment --comment "accept icmpv6 151" -j ACCEPT
-A INPUT -s fe80::/10 -p icmpv6 -m icmpv6 --icmpv6-type 152 -m hl --hl-eq 1 -m comment --comment "accept icmpv6 152" -j ACCEPT
-A INPUT -s fe80::/10 -p icmpv6 -m icmpv6 --icmpv6-type 153 -m hl --hl-eq 1 -m comment --comment "accept icmpv6 153" -j ACCEPT

-A INPUT -s fe80::/10 -p udp -m udp --sport 547 --dport 546 -m comment --comment "accept dhcpv6" -j ACCEPT

-A INPUT -p icmpv6 -m icmpv6 --icmpv6-type destination-unreachable -m comment --comment "accept icmpv6 destination-unreachable" -j ACCEPT
-A INPUT -p icmpv6 -m icmpv6 --icmpv6-type packet-too-big -m comment --comment "accept icmpv6 packet-too-big" -j ACCEPT
-A INPUT -p icmpv6 -m icmpv6 --icmpv6-type time-exceeded -m comment --comment "accept icmpv6 time-exceeded" -j ACCEPT
-A INPUT -p icmpv6 -m icmpv6 --icmpv6-type parameter-problem -m comment --comment "accept icmpv6 parameter-problem" -j ACCEPT
{% if firewall_drop_icmp_flood %}
-A INPUT -p icmpv6 -m icmpv6 --icmpv6-type echo-request -m comment --comment "accept icmpv6 echo-request" -j ICMP_FLOOD
{% else %}
-A INPUT -p icmpv6 -m icmpv6 --icmpv6-type echo-request -m comment --comment "accept icmpv6 echo-request" -j ACCEPT
{% endif %}
-A INPUT -p icmpv6 -m icmpv6 --icmpv6-type echo-reply -m comment --comment "accept icmpv6 echo-reply" -j ACCEPT

-A INPUT -p icmpv6 -m icmpv6 --icmpv6-type router-solicitation -m hl --hl-eq 255 -m comment --comment "accept icmpv6 router-solicitation" -j ACCEPT
-A INPUT -p icmpv6 -m icmpv6 --icmpv6-type router-advertisement -m hl --hl-eq 255 -m comment --comment "accept icmpv6 router-advertisement" -j ACCEPT
-A INPUT -p icmpv6 -m icmpv6 --icmpv6-type neighbour-solicitation -m hl --hl-eq 255 -m comment --comment "accept icmpv6 neighbour-solicitation" -j ACCEPT
-A INPUT -p icmpv6 -m icmpv6 --icmpv6-type neighbour-advertisement -m hl --hl-eq 255 -m comment --comment "accept icmpv6 neighbour-advertisement" -j ACCEPT
-A INPUT -p icmpv6 -m icmpv6 --icmpv6-type 141 -m hl --hl-eq 255 -m comment --comment "accept icmpv6 141" -j ACCEPT
-A INPUT -p icmpv6 -m icmpv6 --icmpv6-type 142 -m hl --hl-eq 255 -m comment --comment "accept icmpv6 142" -j ACCEPT
-A INPUT -p icmpv6 -m icmpv6 --icmpv6-type 148 -m hl --hl-eq 255 -m comment --comment "accept icmpv6 148" -j ACCEPT
-A INPUT -p icmpv6 -m icmpv6 --icmpv6-type 149 -m hl --hl-eq 255 -m comment --comment "accept icmpv6 149" -j ACCEPT

{% if firewall_ipset_bogons.v6 is defined %}
-A INPUT -i {{ firewall_bogon_interface }} -m set --match-set bogons_v6 src,dst -m comment --comment "drop bogons inet6" -j LOG_DROP
{% endif %}

{% if firewall_limit_ssh %}
-A INPUT -p tcp -m tcp --dport 22 -m state --state NEW -m comment --comment "accept ssh 22/tcp6" -j LIMIT_SSH
{% else %}
-A INPUT -p tcp -m tcp --dport 22 -m state --state NEW -m comment --comment "accept ssh 22/tcp6" -j ACCEPT
{% endif %}

{% for port in firewall_allowed_tcp_ports.v6 | default([]) %}
-A INPUT -p tcp -m tcp --dport {{ port }} -m comment --comment "accept {{ port }}/tcp6" -j ACCEPT
{% endfor %}

{% for port in firewall_allowed_udp_ports.v6 | default([]) %}
-A INPUT -p udp -m udp --dport {{ port }} -m comment --comment "accept {{ port }}/udp6" -j ACCEPT
{% endfor %}

-A INPUT -m state --state RELATED,ESTABLISHED -m comment --comment "accept related/established inet6" -j ACCEPT

-A INPUT -m comment --comment "default drop inet6" -j LOG_DROP
COMMIT

*raw
:PREROUTING ACCEPT -
:OUTPUT ACCEPT -
{% if firewall_loopback_notrack %}
-A PREROUTING -i lo -j NOTRACK
-A OUTPUT -o lo -j NOTRACK
{% endif %}
COMMIT

# vim: tw=0