diff --git a/flake.lock b/flake.lock
index 0cc3a19..e68c932 100644
--- a/flake.lock
+++ b/flake.lock
@@ -91,11 +91,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1747225851,
-        "narHash": "sha256-4IbmZrNOdXP143kZEUzxBS5SqyxUlaSHLgdpeJfP2ZU=",
+        "lastModified": 1747340209,
+        "narHash": "sha256-tUiXrwlJoG3dzJ+fSwv1S3VPU5ODSPZJHoBmlu4t344=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "6bf057fc8326e83bda05a669fc08d106547679fb",
+        "rev": "098e365dd83311cc8236f83ea6be42abb49a6c76",
         "type": "github"
       },
       "original": {
@@ -126,11 +126,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1747138802,
-        "narHash": "sha256-Ou4zV3OskaDKlkuiM2VT+1w/xceXoZ5RRM4ZuW7n5+I=",
+        "lastModified": 1747297701,
+        "narHash": "sha256-R8mFJL3lREsJNDqPHbsn03imKoH2ocpzgT2kKWsWYBM=",
         "owner": "LnL7",
         "repo": "nix-darwin",
-        "rev": "f88be00227161a1e9369a1d199f452dd5d720feb",
+        "rev": "b6fff20c692d684d250a39453ed1853dd44c96ab",
         "type": "github"
       },
       "original": {
@@ -141,11 +141,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1746904237,
-        "narHash": "sha256-3e+AVBczosP5dCLQmMoMEogM57gmZ2qrVSrmq9aResQ=",
+        "lastModified": 1747179050,
+        "narHash": "sha256-qhFMmDkeJX9KJwr5H32f1r7Prs7XbQWtO0h3V0a0rFY=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "d89fc19e405cb2d55ce7cc114356846a0ee5e956",
+        "rev": "adaa24fbf46737f3f1b5497bf64bae750f82942e",
         "type": "github"
       },
       "original": {
diff --git a/hosts/linux/cyclone/configuration.nix b/hosts/linux/cyclone/configuration.nix
index 5a2323d..bb7e8d8 100644
--- a/hosts/linux/cyclone/configuration.nix
+++ b/hosts/linux/cyclone/configuration.nix
@@ -9,8 +9,22 @@
   networking = {
     hostName = "cyclone";
     hostId = "79696666";
-    # Allow WireGuard.
-    firewall.checkReversePath = "loose";
+    firewall = {
+      # Allow WireGuard.
+      checkReversePath = "loose";
+
+      interfaces = {
+        # Syncthing
+        "enp14s0" = {
+          allowedTCPPorts = [ 22000 ];
+          allowedUDPPorts = [ 21027 ];
+        };
+        "tailscale0" = {
+          allowedTCPPorts = [ 22000 ];
+          allowedUDPPorts = [ 21027 ];
+        };
+      };
+    };
   };
 
   # General service configuration.
@@ -126,6 +140,7 @@
     jetbrains.idea-ultimate
     signal-desktop
     srain
+    tcpdump
     tuba
     wireshark
     vscode