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General Information
Editor-in-chief
Prof. Wael Badawy
Department of Computing and Information Systems Umm Al Qura University, Canada
I'm happy to take on the position of editor in chief of IJCTE. We encourage authors to submit papers concerning any branch of computer theory and engineering.
IJCTE 2015 Vol.7(6): 453-462 ISSN: 1793-8201
DOI: 10.7763/IJCTE.2015.V7.1002

Multilayer Secured SIP Based VoIP Architecture

Basma Basem, Atef Z. Ghalwash, and Rowayda A. Sadek
Abstract—VoIP faces many emerging attacks and threats. securing SIP based VoIP is a major challenging task, hence confidentiality, integrity, availability, as well as authenticity must be provided. Focusing on three main critical attacks targeting SIP based VoIP infrastructure, which are Denial of service (DoS), man-in-the middle attack, and Authenticity based attacks. In this paper the main contribution is providing a secure efficient multilayer security architecture based on open source applications (snort, snortsam and iptables, as well as OPENVPN Tunnel), The architecture provides a secure reliable VoIP services for the enterprise network, that have been deployed based on asterisk PBX. The proposed security architecture aims to prevent the mentioned critical attacks, to provide CIAA security services, by proposing an adaptive rule based queuing polices. QoS is a major challenge, the paper also provides an enhancement for the proposed architecture to minimize the delay for more efficient secure communication, as well as preventing zero day attacks by exploiting method and updating Snort DB with attack signatures. QoS factors have been measured using OPNET simulators. The proposed architecture gives promising results when it comes to attacks prevention with 0.01% better performance results compared to previous work.

Index Terms—VoIP, snort, OPEN VPN, firewall, iptables, OPNET 17.

Basma Basem is with the Arab Academy for Science, Technology & Maritime Transport, Computer Engineering Department, Egypt (e-mail: basmabasem@hotmail.com.com).
Atef Z. Ghalwash and Rowayda A. Sadek are with the Faculty of Computers and Information, Helwan University, Egypt (e-mail: {atef_ghalwash, rowayda_sadek}@yahoo.com).

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Cite:Basma Basem, Atef Z. Ghalwash, and Rowayda A. Sadek, "Multilayer Secured SIP Based VoIP Architecture," International Journal of Computer Theory and Engineering vol. 7, no. 6, pp. 453-462, 2015.

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