+
+local dns_host = luci.config.diag and luci.config.diag.dns or "dev.openwrt.org"
+local ping_host = luci.config.diag and luci.config.diag.ping or "dev.openwrt.org"
+local route_host = luci.config.diag and luci.config.diag.route or "dev.openwrt.org"