The idea of this paper is to present the audit as a means to increase system security. All sample orders are made in the network infrastructure which is currently active and working. For this reason, the IP addresses are hidden because it is a central firewall and router that are on a live system. All results are from the actual system and show the possible flaws in the configuration of your network infrastructure. The work was not carried out a complete revision of the network infrastructure because of the extensiveness of the same, but the audit shows the most important security and system settings. The audit was performed manually through a network access device via the infrastructure while at the end of the specified manner and audit automation using tools from which three tools with explanations of their functionality and capabilities. At the end there is example of customized script to automate audit inspection of configuration files settings.