From the Traffic Monitor tab of the Firebox System Manager, you can access several diagnostic tools to help investigate network issues. These tools include DNS lookup, which helps resolve domain names to IP addresses; traceroute, which tracks the path packets take to reach a destination; ping, which checks the accessibility of other devices on the network; and TCP dump, which captures and analyzes network packets. Each of these tools is integral for troubleshooting different aspects of network performance and security.