Evaluación final parte 2 (Módulo CCNA2 R&S).

Evaluación final parte 2 (Módulo CCNA2 R&S).Se pretende dar solución a dos escenarios, donde se verificaran las habilidades en el curso CCNA, en el primero de estos la conexión de 03 routers con 02 switchs mediante configuración dinámica de host DHCP(Dynamic Host Configuration Protocol; para el otro escenario tres sucursales distribuidas en las ciudades de Miami, Bogotá y Buenos Aires; solicita configurar e interconectar entre sí cada uno de los dispositivos que forman parte del escenario.It is intended to provide a solution two scenarios, where skills in the CCNA course will be verified, in the first of these the connection of 03 routers with 02 switches through dynamic DHCP host configuration (Dynamic Host Configuration Protocol), for the other scenario three distributed branches in the cities of Miami, Bogotá and Buenos Aires, request to configure and interconnect each of the devices that are part of the scenario

Duplicate address detection and autoconfiguration in OLSR

Mobile Ad hoc NETworks (MANETs) are infrastructure-free, highly dynamic wireless networks, where central administration or configuration by the user is very difficult. In hardwired networks nodes usually rely on a centralized server and use a dynamic host configuration protocol, like DHCP , to acquire an IP address. Such a solution cannot be deployed in MANETs due to the unavailability of any centralized DHCP server. For small scale MANETs, it may be possible to allocate free IP addresses manually. However, the procedure becomes impractical for a large-scale or open system where mobile nodes are free to join and leave. Most of the autoconfiguration algorithms proposed for ad hoc networks are independent of the routing protocols and therefore, generate a significant overhead. Using the genuine optimization of the underlying routing protocol can significantly reduce the autoconfiguration overhead. One of the MANET protocols which have been recently promoted to RFC is the OLSR routing protocol , on which this article focuses. This article aims at complementing the OLSR routing protocol specifications to handle autoconfiguration. The corner stone of this autoconfiguration protocol is an advanced duplicate address detection algorithm. Under well defined assumptions, we prove the correctness of the the proposed autoconfiguration protocol

Modeling and Validation of the Dynamic Host Configuration Protocol with Colored Petri Nets

Petri Networks with a graphical language are based on mathematical logic which have many uses and have capability for modeling and validation of distributed systems and concurrent applications. Colored Petri Networks (CPNs) are a type of Petri Network models that are used in modeling of systems which contain discrete and scattered events. In general, CPNs are used to evaluate system performance and demonstrate the correctness of systems. Dynamic Host Configuration Protocol (DHCP) is one of the main systems of protocols special for servers that are used for dynamic allocation of IP to the network computers (clients). In this paper, we highlight to analyze the correctness and authenticity of DHCPs with the use of CPNs with using the CPN Tools and to prove the accuracy of our protocol's performance.DOI:http://dx.doi.org/10.11591/ijece.v2i3.48

CONTROLLED ONBOARDING OF DEVICES IN A HIERARCHICAL TOPOLOGY THROUGH DETERMINISTIC IP ASSIGNMENT

Techniques are presented herein that support the controlled onboarding of switches that are arranged in a daisy chain or hierarchical topology. Aspects of the presented techniques support a deterministic Dynamic Host Configuration Protocol (DHCP)-based Internet Protocol (IP) address assignment based on the location of a client or device, thus making possible, and allowing the necessary control for, a hop-by-hop DHCP assignment paradigm. Further aspects of the presented techniques leverage elements of a zero-touch provisioning (ZTP) process in support of the onboarding of devices in a hierarchical topology

Prueba de Habilidades Prácticas CCNA

Mediante el desarrollo del presente trabajo se busca llevar a la práctica los conocimientos adquiridos durante el Diplomado de Profundización Cisco (Diseño e Implementación de Soluciones Integradas LAN / WAN), apoyado en la herramienta de Simulación PACKET TRACER.The practice is developed around two scenarios, the first through the configuration of a small network addresses the topics of IPv4 and IPv6 connectivity, the protocols of: Switch security, routing between VLANs, dynamic RIPv2, host configuration are controlled Dynamic (DHCP, Dynamic and Static Network Address Translation (NAT), Access Control Lists (ACL), and Server / Client Network Time Protocol (NTP). The second scenario through network configuration Distribution in different cities allows network administration, basic configuration of device parameters, PPP encapsulation and authentication, OSPF protocol implementation, PAP configuration and DHCP configuration.Ingeniería de sistema

Next Generation DHCP Deployments

Dynamic Host Configuration Protocol has facilitated mobile computing and made life easier for system administrators. This article examines some of the unique security problems found in DHCP environments, including a new technique for passively and remotely fingerprinting hosts using the protocol

An Advanced Configuration and Duplicate Address Detection mechanism for a multi-interface OLSR Network

Mobile Ad hoc NETworks (MANETs) are infrastructure-free, highly dynamic wireless networks, where central administration or configuration by the user is very difficult. In hardwired networks nodes usually rely on a centralized server and use a dynamic host configuration protocol, like DHCP, to acquire an IP address. Such a solution cannot be deployed in MANETs due to the unavailability of any centralized DHCP server. For small scale MANETs, it may be possible to allocate free IP addresses manually. However, the procedure becomes impractical for a large-scale or open system where mobile nodes are free to join and leave. Numerous dynamic addressing schemes for ad hoc networks have been proposed. These approaches differ in a wide range of aspects, such as the usage of centralized servers or full decentralization, hierarchical structure or flat network organization, and explicit or implicit duplicate address detection. In this paper we will present a complete and optimized version of the auto-configuration solutions for OLSR , that we have already proposed in and . This solution works in the case of a nodes having multiple interfaces, and is based on an efficient Duplicate Address Detection(DAD) algorithm which takes advantage of the genuine optimization of the OLSR routing protocol. A proof of the correct operation of the proposed solution is given and the communication overhead induced is evaluated

Location Independent Names for Nomadic Computers

Recent advances in the Domain Name System (DNS) and the Dynamic Host Configuration Protocol (DHCP) have enabled a new approach to supporting mobile users: location independent naming. In this approach, machines use the same hostname from any internet location, but use an IP address that corresponds to their current location. We describe a protocol that implements location independent naming for nomadic computers, i.e., machines that do not need transparent mobility. Our protocol allows hosts to move across security domains, uses existing protocols, and preserves existing trust relationships. Therefore, it preserves the performance and security of normal IP for nomadic computers at the expense of not providing the transparent mobility of Mobile IP. We contend that this is a reasonable trade-off for nomadic computing

The Dynamic Host Configuration Protocol Version 6 Security And Privacy Mechanism

Internet Protocol version 6 (IPv6) is the most recent IP version that aims to accommodate hundreds of thousands of unique IP addresses for devices in the network. In IPv6 network, Dynamic Host Configuration Protocol version IPv6 (DHCPv6) is used to allocate and distribute IPv6 addresses and network configuration parameters to DHCPv6 clients. However, the DHCPv6 protocol was developed without a proper security mechanism making it vulnerable to various threats, such as rogue DHCPv6 server attack and passive attack. Two well-known issues of DHCPv6 are lack of verification mechanism that allows attackers to inject fake network configuration parameters into the network undetected; and privacy concerns due to lack of protection of client information in transit. In order to address these issues, several mechanisms were proposed by researchers to provide authentication and privacy protection for DHCPv6. However, most mechanisms lack the method to distribute the server authentication credentials; and ignore the client's privacy issue. This thesis intends to address the above mentioned issues by proposing DHCPv6Sec mechanism. DHCPv6Sec was evaluated and compared to Secure-DHCPv6 mechanism in terms of rogue DHCPv6 server prevention capability, privacy protection, processing time, traffic overhead, communication time, and message size limitation. The experiment results showed that DHCPv6Sec is superior in all aspects measured. DHCPv6Sec reduced processing time by 57%, and 136% during obtain IPv6 address and processing of Reconfigure message, respectively, compared to Secure-DHCPv6 mechanism. More, DHCPv6Sec reduced configuration time by 27% compared to Secure-DHCPv6 mechanism

E-D2HCP: enhanced distributed dynamic host configuration protocol

Mobile Ad Hoc Networks (MANETs) consist of mobile nodes equipped with wireless devices. They do not need any kind of pre-existent infrastructure and are about self-managed networks. MANETs enable communication between mobile nodes without direct links and across multihop paths. To ensure correct operation of the routing protocols, MANETs, have to assign unique IP addresses to the MANET devices. Furthermore, the address assignment is an important issue when dealing with MANET networks because the traditional approaches are not applicable without some changes, having to provide new protocols for the address auto-configuration. These schemes must take into account the properties of MANETs such as dynamic topology, limited resources or lack of infrastructure. In this paper, we propose a stateful scheme for dynamic allocation of IP addresses in MANETs entitled Extended Distributed Dynamic Host Configuration Protocol because it is based on a previous piece of work (D2CHP). This extension includes the network merging not covered by its predecessor. Simulation results show that the new protocol also improves D2HCP functionality in areas such as fault tolerance, concurrency and latency.Sección Deptal. de Sistemas Informáticos y ComputaciónFac. de Ciencias MatemáticasTRUEAgencia Espanola de Cooperacion Internacional para el Desarrollo (AECID, Spain) through Accion Integrada MAEC-AECID MEDITERRANEOSecurity Engineering Research Center - Ministry of Knowledge Economy (MKE, Korea)pu