The following instructions will help you create a fully functional SIP Session Border Controller. Utilizing the Open Source SBC known as OpenSBC (www.opensourcesip.org) and the Open Source and high performance firewall known as Vyatta (www.vyatta.org) you will be able to create a single server solution. This solution was designed to work with the Open Source PBX sipX Enterprise Communications Server (sipXecs) but should function for most pure SIP solutions with minor adjustments.