300-710 Exam Dumps - Cisco CCNP Security Questions and Answers

The Untrusted reputation level represents URLs associated with malicious, undesirable, or demonstrably unsafe behavior and is therefore the appropriate selection for the access control rule. Questionable applies to URLs that exhibit suspicious characteristics but lack sufficient evidence to be classified as definitively malicious. Neutral identifies sites without a strong positive or negative reputation, while Favorable indicates generally acceptable sites with a positive reputation history. Secure Firewall Management Center combines URL categories with reputation values to provide more precise web-control decisions. Selecting Untrusted enables the rule to match the highest-risk URLs covered by the requirement without unnecessarily treating merely unknown or neutral sites as confirmed threats. Cisco documents URL reputation as the risk component used with URL categories in category-and-reputation-based filtering. Cisco Secure Firewall URL filtering

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The Capture w/Trace wizard in Cisco FMC allows you to capture packets on an FTD device and trace their path through the Snort engine. This can help you troubleshoot connectivity issues from an endpoint behind an FTD device and a public DNS server, as well as verify the Snort verdict for the DNS traffic. The Capture w/Trace wizard lets you specify the source and destination IP addresses, ports, and protocols for the packets you want to capture and trace, as well as the FTD device and interface where you want to perform the capture. You can also apply filters to limit the capture size and duration. After you start the capture, you can ping the DNS server from the endpoint and then view the captured packets and their Snort verdicts in the FMC web interface2.

To use the Capture w/Trace wizard in Cisco FMC, you need to follow these steps2:

In the FMC web interface, navigate to Troubleshooting > Capture/Trace.

Click New Capture.

Choose an FTD device from the Device drop-down list.

Choose an interface from the Interface drop-down list.

Enter the source and destination IP addresses, ports, and protocols for the packets you want to capture and trace. For example, if you want to capture DNS queries from an endpoint with IP address 10.1.1.100 to a DNS server with IP address 8.8.8.8, you can enter these values:

Source IP: 10.1.1.100

Source Port: any

Destination IP: 8.8.8.8

Destination Port: 53

Protocol: UDP

Optionally, apply filters to limit the capture size and duration. For example, you can set the maximum number of packets to capture, the maximum capture file size, or the maximum capture time.

Click Start.

Ping the DNS server from the endpoint and wait for some packets to be captured.

Click Stop to stop the capture.

Click View Capture to see the captured packets and their Snort verdicts.

The other options are incorrect because:

Performing a Snort engine capture using tcpdump from the FTD CLI will not allow you to trace the path of the packets through the Snort engine or verify their Snort verdicts. Tcpdump is a command-line tool that can capture packets on an FTD device, but it does not provide any information about how Snort processes those packets or what actions Snort takes on them2.

Creating a Custom Workflow in Cisco FMC will not help you troubleshoot a connectivity issue from an endpoint behind an FTD device and a public DNS server. A Custom Workflow is a user-defined set of pages that display event data in different formats, such as tables, charts, maps, and so on. A Custom Workflow does not allow you to capture or trace packets on an FTD device3.

Running the system support firewall-engine-debug command from the FTD CLI will not allow you to simulate real DNS traffic on the FTD device or verify the Snort verdict for that traffic. The firewall-engine-debug command is a diagnostic tool that can generate synthetic packets and send them through the Snort engine on an FTD device. The synthetic packets are not real network traffic and do not affect any connections or policies on the FTD device4.

When capturing traffic on a Cisco FTD device to troubleshoot a connectivity problem, a file type that can be exported for reviewing using a tool built for this type of analysis is PCAP. PCAP stands for Packet Capture and it is a file format used to store network packet data captured from anetwork interface8. PCAP files contain the raw data of network packets, including the headers and payloads of each packet8.

PCAP files are widely used in network analysis and troubleshooting tasks. They enable network administrators, analysts, and researchers to inspect and analyze network traffic for various purposes, such as diagnosing network issues, detecting malicious activity, measuring network performance, and understanding network protocols8. PCAP files can be read by applications that understand that format, such as Wireshark, tcpdump, CA NetMaster, or Microsoft Network Monitor8.

The other options are incorrect because:

NetFlow v9 is not a file type, but a protocol for collecting and exporting information about network flows. A network flow is a sequence of packets that share common attributes such as source and destination IP addresses, ports, and protocols9. NetFlow v9 records contain summary information about network flows, such as start and end times, byte counts, packet counts, and so on9. NetFlow v9 records do not contain the raw data of network packets.

NetFlow v5 is not a file type, but an earlier version of the NetFlow protocol for collecting and exporting information about network flows. NetFlow v5 records contain similar information as NetFlow v9 records, but with fewer fields and less flexibility10. NetFlow v5 records do not contain the raw data of network packets.

IPFIX is not a file type, but a protocol for collecting and exporting information about network flows. IPFIX stands for IP Flow Information Export and it is based on NetFlow v9, but with some extensions and improvements11. IPFIX records contain similar information as NetFlow v9 records, but with more fields and more flexibility11. IPFIX records do not contain the raw data of network packets.