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lastFile:modules/clan/gw-router/crowdsec.nix

modules/clan/gw-router/crowdsec.nix

@@ -1,59 +1,59 @@
-{ config, ... }:
-let
-
-in
 {
-  roles.default.perInstance = break{ settings, ... }: {
+  roles.default.perInstance = { settings, ... }: {
     nixosModule =
-      { config, ... }:
+      {
+        config,
+        ...
+      }:
       let
+
+        dir = config.clan.core.settings.directory;
+        instance = "zerotier";
+
+        networkId = builtins.readFile "${dir}/vars/shared/zerotier-network-${instance}/network-id/value";
+        full = "fd" + networkId + "9993";
+        hextet = i: builtins.substring (i * 4) 4 full;
+        subnetZtier = "${hextet 0}:${hextet 1}:${hextet 2}:${hextet 3}:${hextet 4}:${builtins.substring 20 2 full}00::/88";
       in
       {
-        clan.core.vars.generators.gw-router = {
-          prompts.pppoe-username = {
-            description = "PPPoE username (from the ISP)";
-            type = "hidden";
-          };
-          prompts.pppoe-password = {
-            description = "PPPoE password (from the ISP)";
-            type = "hidden";
-          };
-          files."pppoe-username".secret = true;
-          files."pppoe-password".secret = true;
-          script = ''
-            user="$(cat "$prompts"/pppoe-username)"
-            pass="$(cat "$prompts"/pppoe-password)"
-            printf 'user "%s"\n' "$user" > "$out"/pppoe-username
-            printf '"%s" * "%s"\n' "$user" "$pass" > "$out"/pppoe-password
-          '';
-        };
 
-        services.pppd = {
+        services.crowdsec = {
           enable = true;
-          peers.wan = {
+          autoUpdateService = true;
-            autostart = true;
+          hub.collections = [
-            config = ''
+            "crowdsecurity/linux"
-              plugin pppoe.so ${pppInterface}
+            "crowdsecurity/sshd"
-              ifname ppp0
+          ];
-              file ${creds.files."pppoe-username".path}
+          localConfig = {
-              noipdefault
+            acquisitions = [
-              defaultroute
+              {
-              noauth
+                source = "journalctl";
-              hide-password
+                journalctl_filter = [ "_SYSTEMD_UNIT=sshd.service" ];
-              persist
+                labels.type = "syslog";
-              maxfail 0
+              }
-              holdoff 5
+            ];
-              lcp-echo-interval 15
+            # Never ban the ZeroTier mesh — it is the only admin path to these
-              lcp-echo-failure 3
+            # boxes (no public SSH), so a false positive would lock us out.
-              +ipv6
+            # Parser-stage whitelist: mesh events are dropped before any scenario.
-              mtu 1492
+            parsers.s02Enrich = [
-              mru 1492
+              {
-            '';
+                name = "cnx/mesh-whitelist";
+                description = "Whitelist the ZeroTier management mesh";
+                whitelist = {
+                  reason = "ZeroTier mesh is the admin path";
+                  cidr = [ subnetZtier ];
+                };
+              }
+            ];
           };
         };
 
-        environment.etc."ppp/chap-secrets".source = creds.files."pppoe-password".path;
+        services.crowdsec-firewall-bouncer = {
-        environment.etc."ppp/pap-secrets".source = creds.files."pppoe-password".path;
+          enable = true;
+          registerBouncer.enable = true;
+          settings.mode = "nftables";
+        };
+
       };
   };
 }