Advanced Firewall Troubleshooting
This chapter has focused primarily on the core tasks of a firewall to process traffic through the firewall and for the firewall to provide for connectivity and access to remote and protected hosts. However, firewalls continue to gain more advanced features and functions, and it is becoming necessary to troubleshoot those advanced features and functions.
Processes such as SNMP, NTP, routing, and authentication all provide ample opportunity for something to fail that you will need to troubleshoot, diagnose, and repair. The key to troubleshooting these advanced features relies on you undertaking a couple of steps: