IMPLEMENTASI SISTEM KEAMANAN VOIP PADA JARINGAN WLAN (Wireless LAN)

ABSTRAKSI: Teknologi yang berkembang akhir-akhir ini adalah VoIP (Voice Over IP) dan WLAN (Wireless LAN).VoIP adalah suatu aplikasi dimana suara dilewatkan pada paket data serta diproyeksikan menjadi teknologi masa depan yang berbasis paket data.Jaringan wireless menawarkan mobilitas yang cukup tinggi dan praktis dalam pengimplementasiannya. Permasalahan yang di hadapi adalah baik jaringan wireless dan aplikasi VoIP memiliki kerentanan keamanan bila tidak dikonfigurasi dengan baik.Tugas akhir ini mengimplementasikan keamanan pada jaringan Wireless LAN yang dilewati oleh paket VoIP (Voice over IP) serta melakukan pengukuran pada paket tersebut untuk ditinjau performansinya.Aspek keamanan diuji dari segi sniffing, weakness WEP and WPA key , spoofing, man in the middle, call interception and DoS (Denial of Services).Untuk menentukan performansi paket VoIPnya dilihat dari segi delay,jitter dan packet lossnya. Hasil pengujian didapatkan bahwa WEP 128 bit membutuhkan waktu pemecahan kunci 2,3 kali lebih lama serta membutuhkan IVs 2,4 lebih banyak dari WEP 64 bit. Penambahan satu karakter pada kunci mengakibatkan lama waktu yang dibutuhkan untuk pemecahan kunci pada WPA-PSK dan WPA2-PSK menjadi 9 kali lebih lama daripada sebelum dilakukan penambahan karakter pada kunci.Perbandingan nilai delay,jitter dan packet loss sebelum dan sesudah dilakukan pengamanan adalah (20,0116ms,4,5460ms,0% : 20,0102ms,3,1957ms,0%).Dari hasil pengukuran paket VoIP tersebut dapat disimpulkan bahwa konfigurasi keamanan yang dibuat tidak mempengaruhi performansi jaringan VoIP.Kata Kunci : VOIP,WEP,WPA,SPOFFING,MITMABSTRACT: Today one of technology that always grows up is VoIP and WLAN. VoIP (Voice Over IP) is a kind of application that a voice was sent into data package, and projected to future tech that based on data package. Wireless network take a high mobility and simple at the implementation. But the problem is both of wireless and VoIP have a low security in a bad configuration.This final project implants the security of wireless LAN that is used by VoIP and knowing this performance. We test the security side with sniffing, weakness WEP and WPA key, spoofing, man in the middle, call interception and DoS (Denial of Services), to know the performance of sending data with VoIP we look from the delay, jitter and loss package.The result of the experiment is 128 bit WEP need 2,3 longer time in password cracking and need IVs 2,4 more than 64 bit WEP.Cracking with 9 word character in WPAPSK and WPA2-PSK need 9 times longer than 8 character.Comparing delay, jitter and loss package before and after securing is (20,0116ms,4,5460ms,0% : 20,0102ms,3,1957ms,0%).The conclusion of measuring VoIP package is that everything what we do with security configuration will not take effect for VoIP network performance.Keyword: VOIP,WEP,WPA,SPOFFING,MIT

MIPv6 Experimental Evaluation using Overlay Networks

The commercial deployment of Mobile IPv6 has been hastened by the concepts of Integrated Wireless Networks and Overlay Networks, which are present in the notion of the forthcoming generation of wireless communications. Individual wireless access networks show limitations that can be overcome through the integration of different technologies into a single unified platform (i.e., 4G systems). This paper summarises practical experiments performed to evaluate the impact of inter-networking (i.e. vertical handovers) on the Network and Transport layers. Based on our observations, we propose and evaluate a number of inter-technology handover optimisation techniques, e.g., Router Advertisements frequency values, Binding Update simulcasting, Router Advertisement caching, and Soft Handovers. The paper concludes with the description of a policy-based mobility support middleware (PROTON) that hides 4G networking complexities from mobile users, provides informed handover-related decisions, and enables the application of different vertical handover methods and optimisations according to context.Publicad

Investigating the Performance of VOIP over WLAN in Campus Network

Voice will remain a fundamental communication media that cuts across people of all walks of life. VoIP, a new technology has been increasingly popular in recent times due to its affordability and reduced cost in making calls over broadband Internet. This paper uses simulation method to specifically investigate the performance of VoIP over wireless LAN for an increased number of VoIP calls, the use of different coding scheme and increased number of workstations in video conferencing. With this, a determination of the actual number of VoIP calls that each wireless Access point can adequately support with enhanced voice quality was made alongside with the coding scheme that yields the best quality of service in wireless LAN. KEYWORDS: Voice Over Internet Protocol (VOIP), Public switched telephone Network (PSTN), Jitter, Internet

Performance and Analysis of Transfer Control Protocol Over Voice Over Wireless Local Area Network

A thesis presented to the faculty of the College of Science and Technology at Morehead State University in partial fulfillment of the requirements for the Degree Master of Science by Rajendra Patil in August of 2008