for port := range b.applier.PortLevelSetting() {
		// Skip the per-port passthrough filterchain if the port is already handled by InboundMTLSConfiguration().
		if !needPerPortPassthroughFilterChain(port, b.proxy) {
			continue
		}

		authnLog.Debugf("InboundMTLSConfiguration: build extra pass through filter chain for %v:%d", b.proxy.ID, port)