Design and implementation of network infrastructure for an ISP (Internet Services Provider), in order to provide email services, web publishing (via HTTP and HTTPS protocols), management of business processes through custom web applications. Installation and configuration of firewalls and servers used for the delivery of services. These activities were carried out using advanced technologies (systems of virtual machines) in order to improve flexibility and increase the reliability of systems. The work performed allows to manage services through wholly virtual machines, with following advantages:
- services are not dependent on hardware: it is possible to replace the physical servers without having to worry about reinstalling the software, load the data and reconfigure the services. The transfer of virtual machines from one physical server to another occurs without trauma
- backups are extremely effective, not only in order to protect the data, using virtual machines it is possible to save the entire machine that provides the services.
- On a virtual server it is possible to perform upgrades of the operating system as a test, without damage for production's services: the upgrade is performed using a copy of the virtual machine used in production environment.
- More virtual servers can reside on one physical machine, in this way you can have a significant savings in terms of utilization of physical machines, energy consumption, and in case of hardware failure, it is possible to substitute one physical machine with a different model machine: virtual machines works in the same way even if installed on different hardware server.
