diff --git a/aux-etc-nixos/configuration.nix b/aux-etc-nixos/configuration.nix
index 023756e..c0f6208 100644
--- a/aux-etc-nixos/configuration.nix
+++ b/aux-etc-nixos/configuration.nix
@@ -89,11 +89,20 @@ in
       iptables -w -A block-lan-from-wifi -i ${netifLan} -o ${netifWifi} -j DROP
       iptables -w -A block-lan-from-wifi -i ${netifWifi} -o ${netifLan} -j DROP
       iptables -w -A FORWARD -j block-lan-from-wifi
+
+      iptables -w -N block-insecure-devices
+      iptables -w -A block-insecure-devices -m mac --mac-source 00:20:0c:6c:ee:ba -j DROP  # keysight SA
+      iptables -w -A block-insecure-devices -m mac --mac-source 74:5b:c5:20:c1:5f -j DROP  # siglent scope
+      iptables -w -A FORWARD -j block-insecure-devices
     '';
     extraStopCommands = ''
       iptables -w -D FORWARD -j block-lan-from-wifi 2>/dev/null|| true
       iptables -w -F block-lan-from-wifi 2>/dev/null|| true
       iptables -w -X block-lan-from-wifi 2>/dev/null|| true
+
+      iptables -w -D FORWARD -j block-insecure-devices 2>/dev/null|| true
+      iptables -w -F block-insecure-devices 2>/dev/null|| true
+      iptables -w -X block-insecure-devices 2>/dev/null|| true
     '';
   };