diff --git a/.forgejo/workflows/demo.yaml b/.forgejo/workflows/demo.yaml
index 351a7c1..1e4a215 100644
--- a/.forgejo/workflows/demo.yaml
+++ b/.forgejo/workflows/demo.yaml
@@ -9,6 +9,9 @@ jobs:
     runs-on: docker
 
     steps:
+      - name: Check iptable
+        run: iptables -L -t nat
+
       - name: 'FIX: fetch actions/checkout@v4'
         run: curl -vL --create-dirs -o /var/run/act/actions/actions-checkout@v4/dist/index.js https://raw.githubusercontent.com/actions/checkout/main/dist/index.js