Move nftables ruleset to separate file

infra/common/networking.nix

@@ -22,6 +22,7 @@ in
     networking = {
       hostName = config.procolix.vm.name;
       domain = "procolix.com";
+
       interfaces = {
         eth0 = {
           ipv4 = {
@@ -42,6 +43,7 @@ in
           };
         };
       };
+
       defaultGateway = {
         address = "185.206.232.1";
         interface = "eth0";
@@ -50,85 +52,17 @@ in
         address = "2a00:51c0:12:1201::1";
         interface = "eth0";
       };
+
       nameservers = [
         "95.215.185.6"
         "95.215.185.7"
         "2a00:51c0::5fd7:b906"
       ];
+
       firewall.enable = false;
       nftables = {
         enable = true;
-        ruleset = ''
+        rulesetFile = ./nftables-ruleset.nft;
-          #!/usr/sbin/nft -f
-
-          flush ruleset
-
-          ########### define usefull variables here #####################
-          define wan        = eth0
-          define ssh_allow  = {
-                      83.161.147.127/32, # host801 ipv4
-                      95.215.185.92/32,  # host088 ipv4
-                      95.215.185.211/32, # host089 ipv4
-                      95.215.185.34/32,  # nagios2 ipv4
-                      95.215.185.181/32, # ansible.procolix.com
-                      95.215.185.235/32, # ansible-hq
-                  }
-          define snmp_allow = {
-                      95.215.185.31/32,   # cacti ipv4
-                  }
-          define nrpe_allow = {
-                      95.215.185.34/32,   # nagios2 ipv4
-                  }
-
-          ########### here starts the automated bit #####################
-          table inet filter {
-              chain input {
-                  type filter hook input priority 0;
-                  policy drop;
-
-                  # established/related connections
-                  ct state established,related accept
-                  ct state invalid drop
-
-                  # Limit ping requests.
-                  ip protocol icmp icmp type echo-request limit rate over 10/second burst 50 packets drop
-                  ip6 nexthdr icmpv6 icmpv6 type echo-request limit rate over 10/second burst 50 packets drop
-
-                  # loopback interface
-                  iifname lo accept
-
-                  # icmp
-                  ip protocol icmp icmp type { destination-unreachable, echo-reply, echo-request, source-quench, time-exceeded } accept
-                  # Without the nd-* ones ipv6 will not work.
-                  ip6 nexthdr icmpv6 icmpv6 type { destination-unreachable, echo-reply, echo-request, nd-neighbor-solicit,  nd-router-advert, nd-neighbor-advert, packet-too-big, parameter-problem, time-exceeded } accept
-
-                  # open tcp ports: sshd (22)
-                  tcp dport {ssh} accept
-
-                  # open tcp ports: snmp (161)
-                  ip saddr $snmp_allow udp dport {snmp} accept
-
-                  # open tcp ports: nrpe (5666)
-                  ip saddr $nrpe_allow tcp dport {nrpe} accept
-
-                  # open tcp ports: http (80,443)
-                  tcp dport {http,https} accept
-              }
-              chain forward {
-                  type filter hook forward priority 0;
-              }
-              chain output {
-                  type filter hook output priority 0;
-              }
-          }
-
-          table ip nat {
-              chain postrouting {
-              }
-              chain prerouting {
-              }
-          }
-        '';
       };
     };
   };

infra/common/nftables-ruleset.nft

@@ -0,0 +1,71 @@
+#!/usr/sbin/nft -f
+
+flush ruleset
+
+########### define usefull variables here #####################
+
+define wan        = eth0
+define ssh_allow  = {
+    83.161.147.127/32, # host801 ipv4
+    95.215.185.92/32,  # host088 ipv4
+    95.215.185.211/32, # host089 ipv4
+    95.215.185.34/32,  # nagios2 ipv4
+    95.215.185.181/32, # ansible.procolix.com
+    95.215.185.235/32, # ansible-hq
+}
+define snmp_allow = {
+    95.215.185.31/32,  # cacti ipv4
+}
+define nrpe_allow = {
+    95.215.185.34/32,  # nagios2 ipv4
+}
+
+########### here starts the automated bit #####################
+
+table inet filter {
+    chain input {
+        type filter hook input priority 0;
+        policy drop;
+
+        # established/related connections
+        ct state established,related accept
+        ct state invalid drop
+
+        # Limit ping requests.
+        ip protocol icmp icmp type echo-request limit rate over 10/second burst 50 packets drop
+        ip6 nexthdr icmpv6 icmpv6 type echo-request limit rate over 10/second burst 50 packets drop
+
+        # loopback interface
+        iifname lo accept
+
+        # icmp
+        ip protocol icmp icmp type { destination-unreachable, echo-reply, echo-request, source-quench, time-exceeded } accept
+        # Without the nd-* ones ipv6 will not work.
+        ip6 nexthdr icmpv6 icmpv6 type { destination-unreachable, echo-reply, echo-request, nd-neighbor-solicit,  nd-router-advert, nd-neighbor-advert, packet-too-big, parameter-problem, time-exceeded } accept
+
+        # open tcp ports: sshd (22)
+        tcp dport {ssh} accept
+
+        # open tcp ports: snmp (161)
+        ip saddr $snmp_allow udp dport {snmp} accept
+
+        # open tcp ports: nrpe (5666)
+        ip saddr $nrpe_allow tcp dport {nrpe} accept
+
+        # open tcp ports: http (80,443)
+        tcp dport {http,https} accept
+    }
+    chain forward {
+        type filter hook forward priority 0;
+    }
+    chain output {
+        type filter hook output priority 0;
+    }
+}
+
+table ip nat {
+    chain postrouting {
+    }
+    chain prerouting {
+    }
+}