Routers, switches, IDS/IPS, firewalls, Directory Services controllers, and other network devices have a lot of information about network activities. However, the huge amount of data they produce makes it difficult to properly correlate and verify possible intruders or conduct forensic investigations. A Security Information and Event Management (SIEM) solution can significantly reduce the effort and associated costs and provide a much higher level of transparency for security. Network access controls should be implemented in order to ensure the security of network information and the protection of connected services against unauthorized access.