An Evaluation of VoIP Traversal of Firewalls and NATs within an Enterprise Environment

Michael Stukas and Douglas C. Sicker
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Michael Stukas: AVAYA Incorporated
Douglas C. Sicker: AVAYA Incorporated

Information Systems Frontiers, 2004, vol. 6, issue 3, No 4, 219-228

Abstract: Abstract Recent advances in PBX architecture and multimedia communication protocols are pushing the current boundaries of IP telephony in enterprise networks. Two key barriers to this evolution are firewalls and NATs. While these devices play a pivotal role in protecting and managing network resources they also inhibit the sending and receiving of voice and video over the data network. Many different solutions for firewall and NAT traversal either currently exist or are being proposed by standard bodies, vendors and research institutions. Each initiative addresses different issues relating to security and interoperability within existing network infrastructures. This paper will examine all proposed solutions and determine which solution will enable IP telephony traversal of firewalls and NATs most advantageously in an enterprise network.

Keywords: VoIP; NAT; firewall; SIP; enterprise (search for similar items in EconPapers)
Date: 2004
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DOI: 10.1023/B:ISFI.0000037877.05070.93

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