International Journal for Development of Computer Science & Technology (IJDCST)
The increasing demand of VoIP and its support to internet made it as a mainstream and being implemented with a large number of service providers and enterprise networks. The integration of security standards with SIP based VoIP the authors need to check the effects of firewall and VPN techniques which should maintain quality to the business environment. The main goal is to understand the capabilities and to identify gaps in addressing the vulnerabilities in present VoIP systems. The specific problem like (Denial of Service (DoS) and service abuse) are major vulnerabilities considered during implementation of VoIP systems in enterprise.