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-rw-r--r--modules/foundation/vpn.nix3
1 files changed, 3 insertions, 0 deletions
diff --git a/modules/foundation/vpn.nix b/modules/foundation/vpn.nix
index 1a7524d..f4a5d21 100644
--- a/modules/foundation/vpn.nix
+++ b/modules/foundation/vpn.nix
@@ -83,6 +83,9 @@ in
           type filter hook forward priority 0; policy accept;
           iifname "${interface}" oifname "${cfg.externalInterface}" accept
           iifname "${cfg.externalInterface}" oifname "${interface}" ct state established,related accept
+
+          # drop vpn-sourced traffic headed anywhere but external
+          iifname "${interface}" drop
         }
       '';
     };