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Mobile Ad Hoc Networks (MANETs) are networks with self-organizing capabilities and without a fixed infrastructure. Wireless nodes communicate among themselves using multi-hop radio relaying, without requiring the packets to pass through a central access point or a base station. Routing is a function of speed and stability with which the nodes are able to acquire addresses. Efficient routing forms the basis of a fast and reliable communication network. In a highly mobile and infrastructure-less scenario, pre-configuration of addresses is not possible. Therefore node addresses need to be configured dynamically with minimum delay and packet loss. The main task of an address auto-configuration protocol is to manage the resource address space. It must be able to select, allocate, and assign a unique network address to an un-configured node. This paper proposes a new address auto-configuration protocol for mobile ad hoc networks. The scheme uses virtual address space for addressing new nodes joining a network. The aim is to map one point from virtual address sheet to exactly one new node. The reason for using the term "virtual" is that the whole corresponding address space is a 2D flat sheet and each point of this sheet is virtually mapped to a node in MANET. The protocol uses coordinate values for generating addresses.

Mobile ad hoc networking offers convenient infrastructure-less communication over the shared wireless channels. The major research efforts in the area of Mobile Ad hoc Network (MANET) focus on developing efficient routing protocols assuming that IP addresses of mobile hosts have been already configured before joining the network. Providing security for IP address auto-configuration in MANET is still an open problem. Existing solutions for IP address autoconfiguration in MANET do not address security issues. However, it may disserve network security if there is not a reliable authentication mechanism, e.g. an attacker may spoof other nodes and hijack their traffic. Unlike their wired counterpart, infrastructure-less ad hoc networks do not have a clear line of defense, and every node must be prepared for encountering with an adversary. Therefore, a centralized or hierarchical network security solution does not work well. This paper describes the state of research in secure address auto-configuration problem and analyzes the current existing solutions.

In a highly mobile and infrastructure-less networks such as Mobile Ad Hoc Networks (MANET), preconfiguration ofaddresses to the nodes is not possible. Therefore, node addresses must be configured dynamically with minimum delay and packet loss. The address auto-configuration protocol manages the resource address space to assign a unique network address to an un-configured node. This paper proposes a new address auto-configuration protocol for mobile ad hoc networks based on modulus property of integers. The proposed scheme allots IP address to the joining nodes lvithout demand for broadcasting whole networks. Our protocol is easy and of course efficient in terms ofmessage overhead and latency.

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