3 <%- unless @interfaces.empty? %>
4 define external-interfaces = { <%= @interfaces.sort.uniq.join(", ") %> }
7 define ip-private-addresses = { 0.0.0.0, 10.0.0.0/8, 127.0.0.0/8, 169.254.0.0/16, 172.16.0.0/12, 192.0.2.0/24, 192.168.0.0/16, 224.0.0.0/4 }
8 define ip6-private-addresses = { 2001:db8::/32, fc00::/7, ff00::/8 }
11 set ip-osm-addresses {
13 <%- unless Array(@hosts["inet"]).empty? %>
14 elements = { <%= Array(@hosts["inet"]).sort.join(", ") %> }
18 set ip6-osm-addresses {
20 <%- unless Array(@hosts["inet"]).empty? %>
21 elements = { <%= Array(@hosts["inet6"]).sort.join(", ") %> }
35 set limit-icmp-echo-ip {
40 set limit-icmp-echo-ip6 {
45 <%- node[:networking][:firewall][:sets].each do |set| %>
47 <%- if set.end_with?("-ip") %>
49 <%- elsif set.end_with?("-ip6") %>
57 limit rate 1/second log
61 chain log-and-reject {
62 limit rate 1/second log
67 ip saddr { $ip-private-addresses } jump log-and-drop
68 ip6 saddr { $ip6-private-addresses } jump log-and-drop
70 ip saddr @ip-blacklist jump log-and-drop
71 ip6 saddr @ip6-blacklist jump log-and-drop
73 ct state { established, related } accept
75 icmp type { destination-unreachable } accept
76 icmp type { echo-request } add @limit-icmp-echo-ip { ip saddr limit rate 1/second } accept
77 icmp type { echo-request } drop
79 icmpv6 type { nd-neighbor-solicit, nd-neighbor-advert, nd-router-solicit, nd-router-advert } accept
80 icmpv6 type { echo-request } add @limit-icmp-echo-ip6 { ip6 saddr limit rate 1/second } accept
81 icmpv6 type { echo-request } drop
83 meta l4proto { icmp, icmpv6 } jump log-and-drop
85 tcp flags & (fin|syn|rst|psh|ack|urg) == fin|psh|urg jump log-and-drop
86 tcp flags & (fin|syn|rst|psh|ack|urg) == 0x0 jump log-and-drop
87 tcp flags & (syn|rst) == syn|rst jump log-and-drop
88 tcp flags & (fin|rst) == fin|rst jump log-and-drop
89 tcp flags & (fin|syn) == fin|syn jump log-and-drop
90 tcp flags & (fin|psh|ack) == fin|psh jump log-and-drop
91 tcp sport 0 tcp flags & (fin|syn|rst|ack) == syn jump log-and-drop
93 <%- node[:networking][:firewall][:incoming].uniq.each do |rule| %>
101 ip daddr { $ip-private-addresses } jump log-and-drop
102 ip6 daddr { $ip6-private-addresses } jump log-and-drop
104 <%- node[:networking][:firewall][:outgoing].each do |rule| %>
112 type filter hook input priority filter;
114 <%- unless @interfaces.empty? %>
115 iif { $external-interfaces } jump incoming
122 type filter hook forward priority filter;
124 <%- unless @interfaces.empty? %>
125 iif { $external-interfaces } jump incoming
126 oif { $external-interfaces } jump outgoing
133 type filter hook output priority filter;
135 <%- unless @interfaces.empty? %>
136 oif { $external-interfaces } jump outgoing
142 <%- if node[:roles].include?("gateway") %>
146 type nat hook postrouting priority srcnat;
148 <%- node.interfaces(:role => :external).each do |external| %>
149 <%- node.interfaces(:role => :internal).each do |internal| %>
150 oif { <%= external[:interface] %> } ip saddr { <%= internal[:network] %>/<%= internal[:prefix] %> } snat <%= external[:address] %>