19-05-2017, 09:34 AM
MANET consists of a collection of mobile nodes, with no pre-established infrastructure where each node plays a role of router, which is gaining fame day by day due to the wide use of mobile and handheld devices. The dynamic nature of this network, makes the routing protocols play a prominent role in the configuration of the efficient route between pairs of nodes. Therefore, many proactive, reactive and hybrid routing protocols have been proposed, among which one of the well-known is AODV due to its high throughput gain. The cooperative nature of nodes exposes MANET to several types of passive and active attacks. Sinkhole is a serious type of attack that tries to attract most of the network traffic to it and degrade the performance of the network. AODV is analyzed primarily under blakhole, wormhole and flood attack, which needs to be analyzed under other types of attack as well. This work focuses mainly on the sink problem, its consequences and presents the mechanism for its detection and prevention in the context of the AODV protocol. It also shows the AODV performance without sink attack, under attack and after applying our mechanism in the form of simulation results obtained for certain variation of network nodes, considering performance metrics such as performance, PDR, End to end delay and loss Of packages. The simulation is performed using the widely used simulator NS2.
Mobile Ad-hoc Networks (MANET) are mobile mobile nodes that communicate without any predefined infrastructure. This allows MANETs to be easily configured in geographic and terrestrial constraints. To achieve this type of communication, MANET routing protocols play an important role. Two routing protocols, DSR and AODV are studied in detail. This basic feature of a MANET makes its routing protocols very vulnerable to security attacks. One of these attacks is the "Sinkhole" attack that pulls the packets towards the sinkhole node. A malicious Sinkhole node severely degrades the network once the attack is in progress. This document describes two of the popular routing protocols MANET, DSR and AODV and the sinkhole attack in these protocols. Previous research to prevent sewage attack is analyzed. Multiple procedures are documented to prevent and mitigate Sinkhole's problem in MANETs. The proposed solution is based on addressing the sequence number discontinuity to contain Sinkhole attacks. We propose a prevention technique that is based on the fact that the discontinuity of sequence number if addressed can go a long way in containing Sinkhole attacks.
Mobile Ad-hoc Networks (MANET) are mobile mobile nodes that communicate without any predefined infrastructure. This allows MANETs to be easily configured in geographic and terrestrial constraints. To achieve this type of communication, MANET routing protocols play an important role. Two routing protocols, DSR and AODV are studied in detail. This basic feature of a MANET makes its routing protocols very vulnerable to security attacks. One of these attacks is the "Sinkhole" attack that pulls the packets towards the sinkhole node. A malicious Sinkhole node severely degrades the network once the attack is in progress. This document describes two of the popular routing protocols MANET, DSR and AODV and the sinkhole attack in these protocols. Previous research to prevent sewage attack is analyzed. Multiple procedures are documented to prevent and mitigate Sinkhole's problem in MANETs. The proposed solution is based on addressing the sequence number discontinuity to contain Sinkhole attacks. We propose a prevention technique that is based on the fact that the discontinuity of sequence number if addressed can go a long way in containing Sinkhole attacks.