---

        check_cmd = (
            f"timeout 5 bash -c 'cat < /dev/null > /dev/tcp/localhost/{opc_port}' "
            f"&& echo {Im_const.CMD_STATUS_OK} || echo {Im_const.CMD_STATUS_FAIL}"
        )
        result = self._stand_client.run_cmd(check_cmd, need_output=True, use_ssh=False)
        if result != Im_const.CMD_STATUS_OK:
            self.stop_opc_ssh_tunnel()
            raise RuntimeError(
                f"[SETUP] [ERROR] OPC SSH-туннель не поднялся: localhost:{opc_port} недоступен с runner'а"
            )