diff --git a/ip6t-firewall-gateway b/ip6t-firewall-gateway
index 0c6e884..b3990b3 100755
--- a/ip6t-firewall-gateway
+++ b/ip6t-firewall-gateway
@@ -447,7 +447,7 @@ if $protect_against_several_attacks ; then
 
 
    # - private Adressen auf externen interface verwerfen
-   for _dev in ${ext_if_arr[@]} ; do
+   for _dev in ${dsl_device_arr[@]} ; do
       if $log_spoofed || $log_all ; then
          $ip6t -A INPUT -i $_dev -s $ula_block -j LOG --log-prefix "$log_prefix Private (ula_block): " --log-level $log_level
          $ip6t -A INPUT -i $_dev -s $loopback -j LOG --log-prefix "$log_prefix (loopback): " --log-level $log_level