diff --git a/hosts/hyuganatsu/default.nix b/hosts/hyuganatsu/default.nix
index f2afd00..7f6dc07 100644
--- a/hosts/hyuganatsu/default.nix
+++ b/hosts/hyuganatsu/default.nix
@@ -36,4 +36,15 @@
   services.udev.extraRules = ''
     ACTION=="add", SUBSYSTEM=="usb", DRIVERS=="usb", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="c547", ATTR{power/wakeup}="disabled"
   '';
+  networking.firewall = {
+    logReversePathDrops = true;
+    extraCommands = ''
+      ip46tables -t mangle -I nixos-fw-rpfilter -p udp -m udp --sport 51820 -j RETURN
+      ip46tables -t mangle -I nixos-fw-rpfilter -p udp -m udp --dport 51820 -j RETURN
+    '';
+    extraStopCommands = ''
+      ip46tables -t mangle -D nixos-fw-rpfilter -p udp -m udp --sport 51820 -j RETURN || true
+      ip46tables -t mangle -D nixos-fw-rpfilter -p udp -m udp --dport 51820 -j RETURN || true
+    '';
+  };
 }