feat: add firewall module

- add nftables/ipset modules
- add custom firewall module

modules/firewall/manifests/rules/in/cobbler.pp

@@ -0,0 +1,13 @@
+class firewall::rules::in::cobbler (
+  Array[Stdlib::Port]      $ports     = [25150,25151],
+  Array[Enum['tcp','udp']] $protocols = ['udp','tcp'],
+) {
+
+  $ports.each |$port| {
+    $protocols.each |$proto| {
+      nftables::rule { "default_in-cobbler_${proto}_${port}":
+        content => "${proto} dport ${port} accept",
+      }
+    }
+  }
+}

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

@@ -0,0 +1,10 @@
+class firewall::rules::in::consul (
+  Array[Stdlib::Port] $ports = [8300,8301,8302,8500,8503,8600],
+) {
+
+  $ports.each |$port| {
+    nftables::rule { "default_in-consul_${port}":
+      content => "tcp dport ${port} accept",
+    }
+  }
+}

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

@@ -0,0 +1,19 @@
+class firewall::rules::in::dns (
+  Array[Stdlib::Port]      $ports     = [53],
+  Array[Enum['tcp','udp']] $protocols = ['udp','tcp'],
+  Optional[String]         $ipset     = undef,
+) {
+
+  $ports.each |$port| {
+    $protocols.each |$proto| {
+      if $ipset != '' {
+        $rule = "${proto} dport ${port} ip saddr @${ipset} accept"
+      }else{
+        $rule = "${proto} dport ${port} accept"
+      }
+      nftables::rule { "default_in-dns_${proto}_${port}":
+        content => $rule,
+      }
+    }
+  }
+}

modules/firewall/manifests/rules/in/exporters.pp

@@ -0,0 +1,13 @@
+# 9100: node_exporter
+# 9558: sysstemd_exporter
+class firewall::rules::in::exporters (
+  Array[Stdlib::Port] $ports = [9100,9558],
+  String              $ipset = 'prometheus',
+) {
+
+  $ports.each |$port| {
+    nftables::rule { "default_in-metrics_exporter_tcp_${port}":
+      content => "tcp dport ${port} ip saddr @${ipset} accept",
+    }
+  }
+}

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

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

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

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

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

@@ -0,0 +1,10 @@
+class firewall::rules::in::ntp (
+  Array[Stdlib::Port] $ports = [123],
+) {
+
+  $ports.each |$port| {
+    nftables::rule { "default_in-ntp_${port}":
+      content => "udp dport ${port} accept",
+    }
+  }
+}

modules/firewall/manifests/rules/in/ssh.pp

@@ -0,0 +1,16 @@
+class firewall::rules::in::ssh (
+  Array[Stdlib::Port] $ports = [22],
+  Optional[String]    $ipset = undef,
+) {
+
+  $ports.each |$port| {
+    if $ipset != '' {
+      $rule = "tcp dport ${port} ip saddr @${ipset} accept"
+    }else{
+      $rule = "tcp dport ${port} accept"
+    }
+    nftables::rule { "default_in-ssh_tcp_${port}":
+      content => $rule,
+    }
+  }
+}

modules/firewall/manifests/rules/in/tftp.pp

@@ -0,0 +1,13 @@
+class firewall::rules::in::tftp (
+  Array[Stdlib::Port]      $ports     = [69],
+  Array[Enum['tcp','udp']] $protocols = ['udp','tcp'],
+) {
+
+  $ports.each |$port| {
+    $protocols.each |$proto| {
+      nftables::rule { "default_in-tftp_${proto}_${port}":
+        content => "${proto} dport ${port} accept",
+      }
+    }
+  }
+}

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

@@ -0,0 +1,10 @@
+class firewall::rules::in::vault (
+  Array[Stdlib::Port] $ports = [8200, 8201],
+) {
+
+  $ports.each |$port| {
+    nftables::rule { "default_in-vaultserver_${port}":
+      content => "tcp dport ${port} accept",
+    }
+  }
+}