diff --git a/apps/rego-tunnel/build/setup-network.sh b/apps/rego-tunnel/build/setup-network.sh
index 2596f93..5ac3466 100644
--- a/apps/rego-tunnel/build/setup-network.sh
+++ b/apps/rego-tunnel/build/setup-network.sh
@@ -6,10 +6,10 @@
 set -e
 
 # Pick the outbound interface based on the container's default route.
-# (In Docker, this is not always eth0 when multiple networks are attached.)
+# (In Docker, this is not always eth1 when multiple networks are attached.)
 WAN_IF="$(ip route show default 0.0.0.0/0 2>/dev/null | awk '{for(i=1;i<=NF;i++) if($i=="dev"){print $(i+1); exit}}')"
 if [ -z "${WAN_IF}" ]; then
-    WAN_IF="eth0"
+    WAN_IF="eth1"
 fi
 
 # Create bridge if not exists