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Interface → outside

Source Host → any

Packet 1 source → 209.165.201.2

Packet 2 source → 209.165.201.1

Packet 4 ICMP message → echo reply

Unused Options:

209.165.202.1

209.165.202.2

The capture must run on the FTDv outside interface, where the client’s translated address is 209.165.201.2. Selecting any as the source-host criterion captures both the outbound echo requests and the inbound ICMP responses. The first request therefore appears as 209.165.201.2 to 209.165.202.2. When the initial traceroute probe expires at R1, the router generates an ICMP time-exceeded response using its interface address 209.165.201.1. A later probe reaches Server1, which returns an ICMP echo reply from 209.165.202.2 to 209.165.201.2. The completed-answer exhibit in List B places several IP addresses inconsistently; the mapping above follows the displayed topology and actual ICMP traceroute packet flow. Cisco FTD capture and Packet Tracer guidance

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To capture packets that are dropped by Cisco Secure Firewall Threat Defense (FTD) and troubleshoot the issue of traffic from the inside network to a webserver not getting through, the administrator should use the command to capture packets dropped by the accelerated security path (ASP) engine. The correct command is:

capture CAP type asp-drop all headers-only

This command captures all packets dropped by the ASP engine, which includes packets that are being blocked by access control policies, NAT issues, or other security checks.

Steps:

Access the FTD CLI.

Run the commandcapture CAP type asp-drop all headers-onlyto capture dropped packets.

Analyze the captured data to identify the cause of the drops.

This command provides detailed information on why packets are being dropped, helping the administrator resolve the issue.

Ref: https://www.cisco.com/c/en/us/td/docs/security/firepower/60/configuration/guide/fpmc-config-guide-v60/Tailoring_Intrusion_Protection_to_Your_Network_Assets.html

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.