feat: add firewall module

- add nftables/ipset modules
- add custom firewall module

modules/firewall/manifests/rules/out/consul.pp

@@ -0,0 +1,29 @@
+class firewall::rules::out::consul (
+  String $ipset = 'consul',
+) {
+
+  # serf traffic (lan and wan)
+  nftables::rule { 'default_out-consul_udp_8301':
+    content => 'udp dport 8301 accept',
+  }
+  nftables::rule { 'default_out-consul_tcp_8301':
+    content => 'tcp dport 8301 accept',
+  }
+  nftables::rule { 'default_out-consul_udp_8302':
+    content => 'udp dport 8302 accept',
+  }
+  nftables::rule { 'default_out-consul_tcp_8302':
+    content => 'tcp dport 8302 accept',
+  }
+
+  # communication with servers
+  nftables::rule { 'default_out-consul_tcp_8300':
+    content => "tcp dport 8300 ip daddr @${ipset} accept",
+  }
+  nftables::rule { 'default_out-consul_tcp_8500':
+    content => "tcp dport 8500 ip daddr @${ipset} accept",
+  }
+  nftables::rule { 'default_out-consul_tcp_8503':
+    content => "tcp dport 8503 ip daddr @${ipset} accept",
+  }
+}

modules/firewall/manifests/rules/out/dns.pp

@@ -0,0 +1,14 @@
+class firewall::rules::out::dns (
+  String $ipset = 'dns_resolver',
+  Array[Stdlib::Port] $ports = [53],
+) {
+
+  $ports.each |$port| {
+    nftables::rule { "default_out-dns_udp_${port}":
+      content => "udp dport ${port} ip daddr @${ipset} accept",
+    }
+    nftables::rule { "default_out-dns_tcp_${port}":
+      content => "tcp dport ${port} ip daddr @${ipset} accept",
+    }
+  }
+}

modules/firewall/manifests/rules/out/http.pp

@@ -0,0 +1,10 @@
+class firewall::rules::out::http (
+  Array[Stdlib::Port] $ports = [80],
+) {
+
+  $ports.each |$port| {
+    nftables::rule { "default_out-http_tcp_${port}":
+      content => "tcp dport ${port} accept",
+    }
+  }
+}

modules/firewall/manifests/rules/out/https.pp

@@ -0,0 +1,10 @@
+class firewall::rules::out::https (
+  Array[Stdlib::Port] $ports = [443],
+) {
+
+  $ports.each |$port| {
+    nftables::rule { "default_out-https_tcp_${port}":
+      content => "tcp dport ${port} accept",
+    }
+  }
+}

modules/firewall/manifests/rules/out/ntp.pp

@@ -0,0 +1,11 @@
+class firewall::rules::out::ntp (
+  String $ipset = 'ntp',
+  Array[Stdlib::Port] $ports = [123],
+) {
+
+  $ports.each |$port| {
+    nftables::rule { "default_out-ntp_udp_${port}":
+      content => "udp dport ${port} ip daddr @${ipset} accept",
+    }
+  }
+}

modules/firewall/manifests/rules/out/puppet.pp

@@ -0,0 +1,11 @@
+class firewall::rules::out::puppet (
+  String $ipset = 'puppetmaster',
+  Array[Stdlib::Port] $ports = [8140],
+) {
+
+  $ports.each |$port| {
+    nftables::rule { "default_out-puppet_${port}":
+      content => "tcp dport ${port} ip daddr @${ipset} accept",
+    }
+  }
+}

modules/firewall/manifests/rules/out/vault.pp

@@ -0,0 +1,11 @@
+class firewall::rules::out::vault (
+  String $ipset = 'vault',
+  Array[Stdlib::Port] $ports = [8200],
+) {
+
+  $ports.each |$port| {
+    nftables::rule { "default_out-vault_${port}":
+      content => "tcp dport ${port} ip daddr @${ipset} accept",
+    }
+  }
+}