In addition, useful to learn the techniques of problem solving and protect the network perimeter. * Take Inventory See how to do an inventory of devices on your network should be repeated regularly to ensure that the inventory remains accurate. * Use Nmap Learn how Nmap has more features and options than any other free scanner. * Implement Firewalls Use netfilter to perform firewall logic and see how SmoothWall can turn a PC into a firewall appliance specially configured. * Perform Basic Hardening Enter the IT security policy in place so that you have a concrete set of standards against which to measure. * Install and Configure Snort and Wireshark Explore the feature set of powerful tools, as well as traps and other security considerations. * Explore Snort Add-Ons Use tools like Oinkmaster to automatically keep Snort signature files current. Network Troubleshooting * See how to report on bandwidth usage and other metrics and data collection methods like sniffing, NetFlow, and SNMP. * Learn Defense Monitoring Considerations See how to define the limits of your wireless network, and monitor to see if they are being exceeded and to watch for unauthorized traffic on your network.