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The Pfsense opensource firewall is frequently used in network deployments for small and medium enterprises. This document uses the following network topology to illustrate Sipxcom and Pfsense are configured basic configurations for connectivity with an Internet Telephony Service Provider (ITSP). The following assumptions are used in this setup:

  1. Pfsense is installed and provides working Internet connectivity to the 19.168.55.x subnet via a LAN interface.
  2. Sipxcom is installed with an IP address on the 192.168.55.xx subnet - all services required for SIP trunk and phone connectivity are enabled.
  3. The internal SBC application within Sipxcom called Sipxbridge is used for SIP trunk connectivity with the ITSP.