diff --git a/apps/rego-tunnel/vpn_scripts/start.sh b/apps/rego-tunnel/vpn_scripts/start.sh
index bdd1997..6ca5551 100755
--- a/apps/rego-tunnel/vpn_scripts/start.sh
+++ b/apps/rego-tunnel/vpn_scripts/start.sh
@@ -28,8 +28,8 @@ get_windows_ip() {
 }
 
 get_container_ip() {
-  # Get container's external IP (vpn_static-rego - eth0)
-  ip -4 addr show eth0 2>/dev/null | awk '/inet / {print $2}' | cut -d/ -f1
+  # Get container's external IP on 172.31.x.x subnet (vpn_static-rego)
+  ip -4 addr 2>/dev/null | grep -oE '172\.31\.[0-9]+\.[0-9]+' | head -1
 }
 
 (