Mohammed Abdul Qadeer

Network Traffic Analysis and Intrusion Detection Using Packet Sniffer

Computer software that can intercept and log traffic passing over a digital network or part of a network is better known as packet sniffer. The sniffer captures these packets by setting the NIC card in the promiscuous mode and eventually decodes them. The decoded information can be used in any way depending upon the intention of the person concerned who decodes the data (i.e. malicious or beneficial purpose). Depending on the network structure one can sniff all or just parts of the traffic from a single machine within the network. However, there are some methods to avoid traffic narrowing by switches to gain access to traffic from other systems on the network. This paper focuses on the basics of packet sniffer and its working, development of the tool on Linux platform and its use for Intrusion Detection. It also discusses ways to detect the presence of such software on the network and to handle them in an efficient way. Focus has also been laid to analyze the bottleneck scenario arising in the network, using this self developed packet sniffer. Before the development of this indigenous software, minute observation has been made on the working behavior of already existing sniffer software such as wireshark (formerly known as ethereal), tcpdump, and snort, which serve as the base for the development of our sniffer software. For the capture of the packets, a library known as libpcap has been used. The development of such software gives a chance to the developer to incorporate the additional features that are not in the existing one.

Location based services using android (LBSOID)

Initially mobile phones were developed only for voice communication but now days the scenario has changed, voice communication is just one aspect of a mobile phone. There are other aspects which are major focus of interest. Two such major factors are web browser and GPS services. Both of these functionalities are already implemented but are only in the hands of manufacturers not in the hands of users because of proprietary issues, the system does not allow the user to access the mobile hardware directly. But now, after the release of android based open source mobile phone a user can access the hardware directly and design customized native applications to develop Web and GPS enabled services and can program the other hardware components like camera etc. In this paper we will discuss the facilities available in android platform for implementing LBS services (geo-services).

GPS Locator: An Application for Location Tracking and Sharing Using GPS for Java Enabled Handhelds

The use of mobile devices has become a part of our daily routine. Recently, mobile devices like mobile phones or portable digital displays (PDAs) are equipped with global positioning system (GPS) receptors that allow us to get the devices geographic position in real time. Location Based Services (LBS) are regarded as a key feature of many future mobile applications. GPS serves well for most outdoor applications, however, its dependence on satellites makes it ineffective for indoor environments. This document gives a detail on our ongoing project work in the field of Location Based Services for JAVA enabled mobile devices, equipped with GPS receptor. We present a novel technique to send GPS coordinates to other mobiles through Short Message Service (SMS) based on Global Positioning System (GPS) technology. This application also enables the users to get their current location coordinates (latitude, longitude and altitude) and they can also view their locations on the Google maps. Further, this application also enables the user to share his location with their friends through a web server using internet connectivity in their hand helds. GPS is a satellite-based navigation system made up of a network of 24 satellites placed into orbit by the United States (US) Department of Defense (DoD). GPS was originally intended for military applications, but in the 1980s, the government made the system available for civilian use. GPS can show you your exact position on the Earth in any weather conditions, anywhere in the world, 24 hours a day. There are no subscription fees or setup charges to use GPS [6].

Asterisk Voice Exchange: An Alternative to Conventional EPBX

This paper highlights the design and implementation aspects of a VoIP based asterisk voice exchange, developing a fully functional voice exchange requires to set up a server based on Asterisk, connecting clients to that server with the help of soft phones and then configuring the soft phones with the server. Here in our implementation we have connected the clients to the server with the help of IAX protocols. The first part of the paper contains some introductory concepts about VoIP, followed by asterisks internal architecture. In the third part of the paper we discuss about the codecs and protocols used by the packet switching based PBX networks and finally we brush up about the design and implementation aspects.

IMS Network Architecture

There is a rapid growth and evolution in the area of telecommunications and network operators are expected to provide seamless integration of all communication applications on a single system. In these circumstances IMS has emerged out as a key player. IMS is basically a network architecture consisting of an IP-based core network connected to multiple access networks to provide a converged service to wireless,wireline and cable subscribers. IMS has established itself as a foundation for future wireless and wireline convergence. It provides an opportunity to build an open IP based service platform that will enable an easy and efficient deployment of new multimedia communication services mixing telecom and data services. One thing which really makes a difference is that a common IMS based service platform can be used to serve various access mechanisms such as WiMAX, WiFi, UMTS,GSM, CDMA etc. IMS fills the gap between two of the most successful communication paradigm cellular and internet technology. This paper surveys the IMS network architecture and how its various components interact with each other.

Implementation of location awareness and sharing system based on GPS and GPRS using J2ME, PHP and MYSQL

This document provides detail on the implementation of a location awareness system which gives the users current location, sends this location using SMS (Short Message Service) plus sharing location with friends and family and view them on Google maps. Users can also take benefit of this application in emergency situations by using emergency feature of this application. To get the location coordinates, application is using GPS (Global Positioning System) as location provider. The application design has five parts: a mobile client, a web server, a database, GPS system and a map service. A mobile client which consists of a mobile and GPS receiver finds the location of the user to get aware of his location. In order to share this location the mobile client sends this location to the web server from where other users can get this location if they have the authentication provided by the user. The mobile client is implemented using J2ME which is one of the most promising software platforms for mobile devices. Sun representatives assert that 18 to 20 million mobile phones support the J2ME platform [1]. Analysts predict that within the next few years, this technology will become omnipresent. According to Gartner Group estimates, in 2006, approximately 80 percent of mobile phones will support Java [1]. The web server side programming is done using PHP and database is maintained by MYSQL.

Interference evaluation and MS controlled handoff technique for femtocell

Femtocells (aka Home Node B) are low-power wireless access points that operate in licensed spectrum to connect standard mobile devices to a mobile operators network using residential DSL or cable broadband connections [1]. This device has evolved out of the research that despite of large deployment of Macrocell (BTS/BSC) in high density apartment areas and densely populated urban population, the signal strength and voice quality is a major challenge to achieve. But on the other side of the coin there are potential handoff challenges in the implementation of femtocells because of the limitations in the number of adjacent cell sites and unavailability of adequate neighboring cell information during mobility. This paper focuses on the overview of femtocell technology, its potential implementation challenges, Interference evaluation, traditional handoff technique and the suggestion to adopt Mobile Station (MS) controlled handoff technique that should be adopted in order to successfully handover the control from the Mobile operator cell (Macrocell) to the femtocell and vice versa.

Asterisk VoIP private branch exchange

This paper intends to present some important theoretical and practical results that we faced during setting up a VoIP (Voice over Internet Protocol) server with the well known open source VoIP server Asterisk. For a fully functional voice exchange we require to set up a server based on Asterisk, connecting clients to the server with the help of soft/hard phones and then comes the configuration aspects of the soft phones with the server. Here in our implementation we have connected the clients to the server with the help of SIP protocols.

A Novel Scheme for Mobile Payment Using RFID-Enabled Smart SIMcard

Mobile phones have become essential part of everybody’s daily life. Efforts have been made to add more features into the mobile devices. Contact less payment is another dimension that adds value to mobile phones. In contact less payment through mobile device, user is able to pay using his mobile device without touching or swiping card on a reading device. In this paper, we present an idea to equip mobile devices with RFID-enabled SIM (Subscriber Identity Module) card to carry out money transfer. RFID-enabled SIMis a special SIM card that includes RFID (Radio Frequency Identification) chip in the SIM casing. We propose an architecture to integrate RFID and normal SIM features into a single specialized RFID-enabled SIM. This specialized SIM can be used for normal phone applications as well as contact less payment. RFID enables the mobile user to be identified by the RFID reader and SIM stores the payment information. We discuss various scenarios in which RFID-enabled SIM can be used for different applications. This mode of payment provides freedom, flexibility, mobility and security to the customer.

Conferencing, Paging, Voice Mailing via Asterisk EPBX

This paper is intended to present theoretical and implementation details of various important features that are generally associated with an Asterisk based Voice Exchange i.e. Conferencing, Paging and Voice mailing. Besides this we will be concentrating on the web based approach for the configuration of the hard phones that will be used at the clients end. Our approach follows the client server model for all subsidiary procedures. The application is developed in C language and is compatible with all the versions of Linux, essentially providing PC to PC data and voice communications.