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The Purpose of a SIP-Aware Firewall/ALG

Tags:
firewalls

Overview This paper will explore the purpose of a Session Initiation Protocol (SIP)-aware firewall/Application Layer Gateway (ALG) when having SIP trunks to a service provider. Provided in this document is a brief description of the SIP and Network Address Translation (NAT) technologies. In addition, this paper will highlight problems that NAT causes for SIP, and how SIP firewalls/ALGs resolve the problem. There are detailed examples throughout the paper to help understand the nature of the problem. The Objectworld Unified Communication (UC) Server in combination with a SIP firewall/ALG will provide SIP Trunking connectivity to various carriers/service providers.

Further White Paper Details
Publisher	Objectworld Communications	File Format	PDF
Date Published	February 2007
Format	White Papers
Topics	Firewalls, Network Security, Security Tools

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