Abstract in English of my work placement project:

Optimization and Security of a interconnection platform

The goal of this project is to build a SIP routing plate-form, to secure it and to provide the best of Services Quality.
This platform has to receive and manage SIP calls (SIP is one of most important VoIP protocol allowing voice, video and data transfer over Internet network) and route these calls toward different gateways. Asterisk system has been selected as the main core of this routing platform.
VoIP traffic will cross over public Internet network; the major issue is to choose a safety policy. To do this, we have decided to use one of partner’s products of Questo: SIP Firewall SIPAssure from the Canadian firm Borderware.
One of our goals is to have a good quality of service for our future users. Then, we decided to use a QoS product with load balancing, prioritization and aDSL link aggregation functionalities. This product is PePLink Balance 200, from one of Questo’s partners.
A phase of tests allows to validate previous both points. The purpose is to see the effects of two threats taken in example, the DoS attack (denial of service) and the attack by impersonation on the infrastructure, unprotected time and the other time with protection.