diff --git a/extras/packaging/gnu-linux/debian/postinst b/extras/packaging/gnu-linux/debian/postinst
index 33a7e8e..39ad146 100644
--- a/extras/packaging/gnu-linux/debian/postinst
+++ b/extras/packaging/gnu-linux/debian/postinst
@@ -68,6 +68,15 @@
             echo "# When anonymous is set to false, the server allows only connection which are issued by the same CA as the server"
             echo "anonymous: false"
             echo ""
+            echo "# List of authorized services"
+            echo "# Each service is defined by an IP and a port"
+            echo "authorized_services:"
+            echo "  - ip: \"127.0.0.1\""
+            echo "    port: 22"
+            echo "  # - ip: \"127.0.0.1\""
+            echo "  #   port: 80"
+            echo "  # - ip: \"127.0.0.1\""
+            echo "  #   port: 443"
             echo ""
         } > /etc/dhtnet/dnc.yaml
     fi