The Experts below are selected from a list of 7281 Experts worldwide ranked by ideXlab platform
Camacho Benalcázar, Jennifer Tatiana - One of the best experts on this subject based on the ideXlab platform.
-
Evaluación de Alternativas de Software Libre para la Interoperabilidad con Soluciones Propietarias Cisco.
'Escuela Superior Politecnica de Chimborazo', 2015Co-Authors: Camacho Benalcázar, Jennifer TatianaAbstract:Se realizó la evaluación de alternativas de software libre (software que no requiere licencia) para la interoperabilidad (condición que permite que sistemas o productos diferentes puedan relacionarse entre sí, para coordinar procesos o intercambiar datos) con soluciones en dispositivos de red propietarias Cisco, con la finalidad de que las pymes (pequeñas y medianas empresas en desarrollo) tengan una opción económica, estable y sencilla para implementar en pequeñas redes. En la Academia Cisco de la Escuela Superior Politécnica de Chimborazo, se implementó un prototipo de pruebas que ayudó a comprobar la interoperabilidad entre la solución open-routing (enrutamiento abierto) Vyatta (software para las redes que conectan, aseguran las redes físicas como virtuales y de las infraestructuras de computación en nube) y Cisco. El mismo que contó con: tres routers Cisco Catalyst 2811, cinco switchs Cisco 2960, tres computadoras utilizadas como routers Vyatta, un servidor web y de telefonía asterisk, cuatro computadores como clientes y software de telefonía zoiper. La investigación se basó en la evaluación de las tres alternativas de software libre donde se obtuvo el resultado (basado en el modelo ISO 9126), luego se hizo el análisis y clasificación de los datos obtenidos para finalmente llegar a una conclusión del estudio. Como resultado se obtuvo que la alternativa de software libre más funcional para interoperar con soluciones propietarias Cisco es el open-routing Vyatta, al obtener como promedio en la evaluación de software libre el 92% con respecto a la interoperabilidad. Se concluye que la alternativa de software libre que permite mayor grado de interoperabilidad con la solución propietaria Cisco es Vyatta porque utiliza menos recursos, su configuración es sencilla y es una solución abierta (open-source) con servicios como router /firewall/ VPN. Es recomendable que el open routing vyatta sea utilizado en redes pequeñas y medianas, en caso de implementarse en escenarios virtualizados cerciorarse que las interfaces a configurar sean debidamente instaladas y configuradas.The evaluation of alternatives for free software (the software that does not require license)was made for interoperability (condition that allows systems or different products can interact with one another, to coordinate processes or exchange data) with Solutions in network devices Cisco Proprietary, whit the purpose of that SMES (small and medium/sized enterprises in development) have an economical option, stable and easy to implement on small networks. At Cisco Academy of Escuela Superior Politecnica de Chimborazo, a prototype of evidence has been implemented to check the interoperability between the Solution open-routing Vyatta (software for networks that connect, ensure the physical and virtual networks and the infrastructure for cloud computing) and Cisco 2960, three same had three routers Cisco Catalyst 2811, five switches Cisco 2960, three computers used as Vyatta routers, a web server and asterisk telephony, four computers as customers and telephony software as customers and telephony software zoiper. The research is based on the three alternative free software evaluation where it was obtained the result (based on the model ISO9126), then was made the analysis and classification of the data obtained for finally for finally reach a conclusion of the study. As a result, it was observed that the alternative of free software more functional to interoperate with Cisco Proprietary Solutions is the open-routing Vyatta, to obtain as average in the evaluation so software free 92% with respect to interoperability. It is concluded that the alternative of free software that allows a greater of interoperability with the Cisco Proprietary Solution is Vyatta because it used less resources, its configuration is simple and is open Solution (open-source) with services such as router/firewall/VPN. It is recommend that the Vyatta open routing is used in small and medium networks, to implement in virtualized scenarios and ensure that the interfaces to configure can be properly can be properly installed and configured
Hui Na Chua - One of the best experts on this subject based on the ideXlab platform.
-
experimental finding in implementing commrobot comparing ims and Proprietary Solution
International Conference on Communications, 2009Co-Authors: Yenchurn Ngeow, Karyn Weiju Khoo, Hui Na ChuaAbstract:In this paper we present the experimental findings in comparing standard IMS with Proprietary non-IMS Solution from the aspects of session control mechanisms and service management capabilities support in the context of providing automated converged services. The methodology used in the experimental study is via developing an automated converged communication service called CommRobot (Communication Robot) as the use case for comparison. The CommRobot use case is aimed to demonstrate the capability of enhancing user flexibility in choosing how and when services to be delivered regardless of access methods i.e. interfaces, devices or networks. Together with the comparison, we also present the experimented CommRobot test-bed, discussion of our findings and the challenges we identified in implementing the use case service using both standard IMS and non-IMS Proprietary Solutions.
Jiménez Würzburger Jorge - One of the best experts on this subject based on the ideXlab platform.
-
Desarrollo y validación de un bootloader para aplicaciones de carga remota en entornos inalámbricos 802.15.4 y Zigbee
2009Co-Authors: Jiménez Würzburger JorgeAbstract:En el entorno hostil que suele representar una red inalámbrica de sensores (WSN): escenarios con alta densidad de dispositivos, equipos instalados en localizaciones de difícil acceso, comunicaciones de alta latencia sobre canales ruidosos con numerosas interferencias, etcétera, se hace necesario un mecanismo que posibilite la actualización del firmware de los componentes del sistema. De esta forma se podrían corregir errores de funcionamiento, modificar parámetros de comportamiento o simplemente añadir nuevas funcionalidades a los dispositivos de la red. La tecnología ZigBee, diseñada para la intercomunicación inalámbrica de dispositivos de reducida capacidad, tamaño, consumo y coste, se plantea como una de las más apropiadas para cubrir la mayoría de las necesidades demandadas en el campo de las redes de sensores. Sin embargo ni el estándar ZigBee, ni los perfiles superiores de aplicación que funcionan sobre él, especifican el procedimiento que han de seguir los dispositivos para actualizar su firmware, dejando que cada fabricante plantee su solución propietaria para los productos que introduce en el mercado. Así pues, el objetivo de este proyecto será desarrollar un cargador de arranque (bootloader) capaz de sustituir el firmware en ejecución en dispositivos ZigBee por otro que previamente una aplicación de carga remota ha recibido y almacenado en una memoria auxiliar. Para ello, será necesario familiarizarse previamente con el entorno de desarrollo (CodeWarrior) y las librerías IEEE 802.15.4 y ZigBee que suministra uno de los principales fabricantes de chips en la banda de frecuencias de 2,4GHz, Freescale, para una vez adquirida la capacidad de crear nuevas aplicaciones sobre ellas y entender el funcionamiento de las diferentes capas, programar el bootloader. Puesto que el procedimiento interno de actualización del firmware de un dispositivo ZigBee es muy dependiente de los componentes (chip, memoria, bus, etc.) que integre, será necesario estudiar también, a lo largo del desarrollo del proyecto, el caso concreto de los circuitos de los equipos que pretenden soportar esta aplicación. Finalmente, puesto que el bootloader debe ser capaz de actualizar equipos ZigBee de forma independiente del modo en que la nueva imagen llegue hasta la memoria auxiliar, será imprescindible elaborar una aplicación auxiliar (cargador RS232) capaz de transmitir el nuevo firmware al dispositivo. La elaboración de este cargador permitirá depurar y validar el funcionamiento del bootloader además de evaluar el formato óptimo de almacenamiento de la nueva imagen de firmware en la memoria auxiliar. ______________________________________________________________________________In the hostile environment that is often a wireless sensor network (WSN), a great need of a system devices’ firmware updating mechanism rises up. This way, application bugs could be fixed, devices’ behaviour could be modified and new functionalities could be added. ZigBee technology is designed to grant wireless communications between small, low consumption & low cost devices, so it is probably the most appropriate standard to meet the needs demanded in the field of sensor networks. However, neither the ZigBee standard nor the application profiles specify how wireless devices can update their firmware. So each manufacturer will have to develop its Proprietary Solution for the devices that sells. Thus, the objective of this final thesis is to develop a boot loader capable of replacing the old firmware running on a ZigBee device by a new one previously stored in an auxiliary EEPROM by a remote programming application. To achieve this aim, the first step to be taken will be choosing a suitable ZigBee chip manufacturer (Freescale) and then becoming familiar with its development environment (CodeWarrior) and its IEEE 802.15.4/ZigBee libraries. Freescale is nowadays one of the leading ZigBee chip manufacturers working on the frequency band of 2.4 GHz and, at the time this thesis started, it was probably the best choice. Since the internal process of updating the firmware of a ZigBee device is highly dependent on its integrated components (chip, memory, bus, etc...) a deep study of chosen ZigBee device’s integrated circuits will have to be done next in order to successfully develop the bootloader. Finally, since the developed application should be able to update ZigBee devices in real time independently of the means the new image is stored in the EEPROM. To achieve that, it will be essential to develop next an auxiliary application (RS232 loader) capable of transmitting the new firmware to the device so the programmed bootloader could be debugged and validated. In addition to all this, the optimum format for storing the new firmware image in the auxiliary memory will be discussed.Ingeniería de Telecomunicació
Calado, João Paulo Da Costa - One of the best experts on this subject based on the ideXlab platform.
-
Open source IDS/IPS in a production environment: comparing, assessing and implementing
2018Co-Authors: Calado, João Paulo Da CostaAbstract:Trabalho de projecto de mestrado, Segurança Informática, Universidade de Lisboa, Faculdade de Ciências, 2018This work describes the realization of an IDS Solution in a productive environment. It was intended to evaluate its feasibility comparing some options and thus opening the possibility of putting this Solution in inline mode. Hence, the host organization may consider replacing a current security Solution (Proprietary hardware and software), with a Free Software or Open Source firewall and IPS. Typically the market presents products developed for this purpose using dedicated hardware, creating highly efficient and robust black boxes. For these products the manufacturers guarantee a series of commitments, taking advantage of high values for licensing, additional features or even product support. Sometimes these products are based on community projects being brought to market by vendors in Proprietary variants. In this perspective, it was intended, in this work, to evaluate the possibility of creating a defense environment entirely based on alternatives to the manufacturers’, from the operating system to the application’s level evaluation layers. This work provides a series of laboratory simulations (using virtualization), the placement in staging of the IDS Solution, the comparison of actual results with real traffic, and retrieving the physical evaluation of comparable resources. In this way an evaluation of this Solution will be presented to the host organization so that an informed decision is made about its possible implementation in production, to replace a Proprietary Solution. We found that, in fact, it is possible to use commodity hardware to implement such Solution in the tested environment, and with the presented traffic demand. At least one of the tested IDSs (Suricata) performed flawlessly, for several days, in a highly dense and complex network, where more than 3Gbps with peaks around 4.5Gbps were observed. The work also reports on scenarios where two concurrent instances were run, with each one inspecting a dedicated 10Gbps listening interface
Dominique Torre - One of the best experts on this subject based on the ideXlab platform.
-
Proprietary or Open Source Software? Winner-Takes-All Competition, Partial Adoption and Efficiency
Revue d'économie industrielle, 2011Co-Authors: Eric Darmon, Thomas Le Texier, Dominique TorreAbstract:We study the conditions ruling the diffusion of open source as opposed to Proprietary software distributed by a commercial editor. The two types of software differ in relation to their adoption costs and to the range of functionalities they offer. By distinguishing software users according to their ability to contribute to the production of open source Solutions, we characterize the Nash equilibrium in a sequential game in which users choose to adopt open source software or Proprietary software or not to adopt. We find that adoption patterns depend on the conditions related to the users' expectations and we highlight potential cases of both winner-takes-all and shared-market outcomes. Since multiple equilibria are only imperfectly controlled by the commercial editor, we show that the latter's strategy can be understood as a balance between a low price high quality strategy and a high price low quality strategy. Welfare analysis provides mixed results. The existence of a credible open source threat improves the utility of end-users even if the Proprietary Solution is eventually adopted. The diffusion of open source software can generate conflicts of interest. In some cases, these conflicts oppose the interests of users to those of the commercial firm. Yet, in other cases, the interests of some users can be aligned to those of the commercial editor.
