Cisco ASA Firewall Packet Tracer for Network Troubleshooting
Cisco ASA Firewall Packet Tracer for Network Troubleshooting
One of the most useful troubleshooting features of Cisco ASA firewalls is to use the “packet-tracer” command to trace and simulate how a packet will traverse through the ASA appliance in order to identify possible problems (such as why a packet is blocked etc).
With the “packet-tracer” command it is possible to trace the lifespan of a packet through the security appliance to see if it is behaving as expected.
The packet-tracer command lets you do the following:
Debug all packet drops in production network.
Verify the configuration is working as intended.
Show all rules applicable to a packet along with the CLI lines which caused the rule addition.
Show a time line of packet changes in a data path.
Inject tracer packets into the data path.
The packet-tracer command provides detailed information about the packets and how they are processed by the security appliance.
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