diff --git a/hosts/default/configuration.nix b/hosts/default/configuration.nix
index 28fca6f..0f223d7 100644
--- a/hosts/default/configuration.nix
+++ b/hosts/default/configuration.nix
@@ -367,11 +367,16 @@
     7791 # Pixelflut
     38281 # Archipelago
 
+    22000 # syncthing
+
     2283 # immich
   ];
   networking.firewall.allowedUDPPorts = [
     53317
     38281 # Archipelago
+
+    22000 # syncthing
+    21027 # syncthing
   ];
   # Or disable the firewall altogether.
   # networking.firewall.enable = false;
diff --git a/hosts/default/home.nix b/hosts/default/home.nix
index 6fa7213..f28b5c5 100644
--- a/hosts/default/home.nix
+++ b/hosts/default/home.nix
@@ -160,6 +160,10 @@
     zsh.shellAliases.bzzt = ''nix-shell -p mpv --command "mpv ~/Videos/BZZZM.mp4"'';
   };
 
+  services.syncthing = {
+    enable = true;
+  };
+
   home.pointerCursor =
     let
       getFrom = url: hash: name: {
diff --git a/hosts/muos/configuration.nix b/hosts/muos/configuration.nix
index 4f63256..dcf50a5 100644
--- a/hosts/muos/configuration.nix
+++ b/hosts/muos/configuration.nix
@@ -291,9 +291,14 @@
   # Open ports in the firewall.
   networking.firewall.allowedTCPPorts = [
     53317 # Localsend
+
+    22000 # syncthing
   ];
   networking.firewall.allowedUDPPorts = [
     53317
+
+    22000 # syncthing
+    21027 # syncthing
   ];
   # Or disable the firewall altogether.
   # networking.firewall.enable = false;
diff --git a/hosts/muos/home.nix b/hosts/muos/home.nix
index f255f19..96f3296 100644
--- a/hosts/muos/home.nix
+++ b/hosts/muos/home.nix
@@ -162,6 +162,10 @@
     home-manager.enable = true;
   };
 
+  services.syncthing = {
+    enable = true;
+  };
+
   home.pointerCursor =
     let
       getFrom = url: hash: name: {
diff --git a/hosts/server/configuration.nix b/hosts/server/configuration.nix
index 9f18907..fe1ddf4 100644
--- a/hosts/server/configuration.nix
+++ b/hosts/server/configuration.nix
@@ -331,11 +331,16 @@
     80 # http
     443 # https
     3000 # hydra
+
+    22000 # syncthing
   ];
   networking.firewall.allowedUDPPorts = [
     22 # ssh
     80 # http
     443 # https
+
+    22000 # syncthing
+    21027 # syncthing
   ];
   # Or disable the firewall altogether.
   # networking.firewall.enable = false;
diff --git a/hosts/server/home.nix b/hosts/server/home.nix
index fdd09c7..56f1eb3 100644
--- a/hosts/server/home.nix
+++ b/hosts/server/home.nix
@@ -52,8 +52,9 @@
     apps.zsh.enable = true;
   };
 
-
-
+  services.syncthing = {
+    enable = true;
+  };