#TITLE_ALTERNATIVE#

• Main Author: PRADANA (NIM : 13206079); Pembimbing Tugas Akhir : Ir. Sigit Haryadi MT., ALDY
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/14783
• Institution: Institut Teknologi Bandung

Voice over Internet Protocol (VoIP) is defined as a system that uses the internet network to transmit voice data packets from one place to another. Since that VoIP communications transmitted across IP networks, the issue of security attacks to that communications can not be ignored. One way to build a secure data exchange through the internet is by using a Virtual Private Network (VPN). VPN connects two points via a public network who form a virtual connection between that two points. In this final project, a testbed is configured to performs communication <br /> <br /> <br /> between two VoIP servers, as well as to build the VPN server. Two clients communicate each other using X-Lite softphone. Server implemented on FreeBSD 7.1 Release operating system, while the client uses Microsoft Windows <br /> <br /> <br /> operating system. Asterisk software is used to performs VoIP servers, then IPsec-Tools is used for VPN tunneling. <br /> <br /> <br /> When VoIP communications take place, measurements and calculations of delay, packet loss, jitter, and Mean Opinion Score (MOS) are performed. Beside that, some VoIP communications tapping experiments are also performed. This <br /> <br /> <br /> processes are carried out both before and after using the VPN. Apparently, the use of VPN can affect the performance and quality of VoIP communications network. However, performance and network quality parameters still meets the <br /> <br /> <br /> requirements of good VoIP communications. The result shows that average end to end delay was 26.8237 ms, average packet loss was 0.36%, maximum value of peak jitter was 14.27 ms and average MOS was 4.382. Beside that, by <br /> <br /> <br /> implementing a VPN, every packet that passed through the tunnel will not be easily tapped because they will be encapsulated in the delivery. Comercially used VoIP VPN will be given a special route and link, so they guarantee the best QoS.