An All-IP network is probably getting highly feasible since all applications and services in the telecommunication are already getting IP enabled. Internet Protocol version 6 or IPv6 is a later version of IP suite as it is designed to handle the increasing number of Internet applications. Security has become a major concern for the IP next generation network architecture and is considered as one of the most fundamental requirements for business continuity and service delivery. Several initiatives have been made by researchers to integrate secure IPv4/IPv6 address translation between IPv4 and IPv6 networks. But, not much progress has been reported in the recent past. Hence, in this research, an Integrated Secure Architecture for IPv4/IPv6 Address Translation between IPv4 and IPv6 Networks, with an IPv4/IPv6-Enabled Gateway Translator (IP46EGT), has been proposed to achieve MAC-level, VPN-IPSec, and Certificate level security. Network performance is evaluated and the generated results are tabulated and graphically presented.