Cisco 300-710 Securing Networks with Cisco Firepower (300-710 SNCF) Exam Practice Test

If users report that Cisco Duo 2FA fails when attempting to connect to the VPN on a Cisco Secure Firewall Threat Defense (FTD) device, and the VPN troubleshooting log in FMC shows an error indicating that the Cisco Duo AAA server has been marked as failed, the root cause is likely missing Duo trust certificates on the FTD device. Trust certificates are essential for establishing a secure and trusted connection between the FTD and the Duo authentication service.

Steps:

Obtain the necessary Duo trust certificates.

Install the certificates on the FTD device.

Verify the configuration to ensure that the FTD device can properly communicate with the Duo AAA server.

This resolves the authentication failure by ensuring that the FTD device can trust the Duo server.

Cisco Secure Firewall Threat Defense Virtual (FTDv) appliances support High Availability (HA) configurations in specific virtual environments. The supported environments for HA setups include:

ESXi: VMware ' s ESXi is a widely supported platform for deploying FTDv appliances in HA configurations.

AWS: Amazon Web Services (AWS) supports FTDv appliances and allows for HA configurations to ensure redundancy and reliability in cloud deployments.

These environments provide the necessary infrastructure and capabilities to support the high availability requirements for FTDv appliances.

Integrated Routing and Bridging allows a Secure Firewall device operating in routed mode to contain bridge groups while also supporting routed interfaces. Multiple physical or logical interfaces can become members of one bridge group, placing them in the same Layer 2 broadcast domain, VLAN, and IP subnet. A Bridge Virtual Interface represents that bridge group at Layer 3 and functions as its gateway, permitting communication between the bridged network and routed interfaces or other bridge groups, subject to security policy. This can remove the need for an additional external Layer 2 switch when suitable firewall interfaces are available. IRB does not itself provide high availability, security-context separation, or Cisco Talos threat-intelligence updates. Those capabilities are implemented through separate features. Therefore, allowing multiple interfaces to participate in the same VLAN is the stated IRB benefit. Cisco IRB documentation

================

To configure IPS mode on a Cisco Secure Firewall Threat Defense (FTD) device to inspect traffic and act as an IDS, the network engineer must configure an intrusion policy on the FTD device. The passive-interface and SPAN on the switch have already been configured, which means the traffic is being mirrored to the FTD. The next step is to set up an intrusion policy that defines the rules and actions for detecting and responding to malicious traffic.

Steps:

In FMC, navigate toPolicies > Intrusion.

Create a new intrusion policy or edit an existing one.

Define the rules and actions for detecting threats.

Apply the intrusion policy to the relevant interfaces or access control policies.

This configuration enables the FTD to inspect the mirrored traffic and take appropriate actions based on the defined intrusion policy.

To configure an isolated bridge group for Integrated Routing and Bridging (IRB) mode on a Cisco Secure Firewall device, the action to take is to leave the BVI (Bridge Virtual Interface) interface name empty. This ensures that the bridge group operates in an isolated manner, where Layer 3 routing is not applied to the bridged interfaces, effectively isolating the traffic within the bridge group.

Steps:

Access the firewall ' s configuration interface.

Configure the bridge group interfaces.

Ensure that the BVI interface name is left empty to isolate the bridge group.

This configuration prevents Layer 3 routing for the isolated bridge group, ensuring that traffic remains contained within the bridge group.

Cisco Threat Response (CTR) is a security solution that helps simplify incident investigation and threat hunting. One of its components that significantly simplifies the investigation process is the browser plug-in. The browser plug-in integrates with CTR to provide contextual information directly within the browser, allowing security analysts to quickly view threat details, pivot to related information, and take appropriate actions without switching between multiple tools.

Features of the browser plug-in:

Provides real-time threat intelligence and context from various Cisco security products.

Allows security analysts to investigate incidents directly from web-based consoles.

Enhances efficiency by streamlining the workflow and reducing the time needed to gather and correlate information.

Individual intrusion rules do not support direct time-range conditions or scheduled activation triggers. Instead, the administrator creates a time-range object and uses it as a condition in an access control rule. The required intrusion policy is then associated with that access control rule. During the specified time range, matching traffic invokes the intrusion policy and its enabled intrusion rules; outside the range, the access control rule does not match. Multiple access control rules can be created when different intrusion policies or protection levels are needed at different times. Secure Firewall Management Center does not require an external scheduled task to enable and disable individual intrusion rules. Cisco documents time-range objects as the mechanism for making supported policies apply only during defined periods. Therefore, time-based access control rules are the correct implementation. Cisco time-range objects

https://www.cisco.com/c/en/us/td/docs/security/firepower/601/configuration/guide/fpmc-config-guide-v601/fpmc-config-guide-v60_chapter_01011010.pdf

Change Reconciliation records snapshots whenever users save system-configuration changes and combines those snapshots into a detailed report covering the previous 24 hours. Under System > Configuration > Change Reconciliation, the administrator enables the feature, selects the daily execution time, and specifies management’s recipient email addresses. The administrator can also include policy-configuration changes and enable the full change history instead of receiving only a consolidated view. An email relay host must be configured so that Management Center can deliver the report. Sending audit logs to an HTTP or syslog server streams audit events to an external collector; it does not generate the required daily email summary. STIG Compliance applies security-hardening settings and is unrelated to scheduled change reporting. Cisco Change Reconciliation documentation

The content keyword is used to specify a string or pattern to search for in the payload or stream of a packet. The string must be enclosed in quotation marks and can use modifiers such as nocase, depth, offset, and so on. The string can also use hexadecimal notation by using a pipe symbol (|) before and after the hexadecimal characters. For example, content: " |45 5* 26 27 4 0A| " will match any payload or stream that contains the hexadecimal bytes 45 5 26 27 4 0A followed by any number of bytes2

Threat Intelligence Director cannot apply Block directly to a TAXII source because STIX data obtained through TAXII can contain complex indicators. A managed device takes enforcement action based on individual observables, such as an IP address, URL, domain, or file hash. After the TAXII content has been ingested, an administrator can configure Block on an individual observable or on a simple indicator containing one actionable observable. Complex indicators combine multiple observables and therefore cannot be blocked directly; the administrator must instead block the appropriate individual observables within them. An element is the managed device that receives published intelligence, not an intelligence object on which this action is configured. Consequently, the two supported object types are an observable and a simple indicator. Cisco Threat Intelligence Director documentation

================

When replacing a Cisco Secure Firewall high-availability (HA) device due to a failure, the first step the engineer must take is to unregister the secondary (failed) device from the Cisco Secure Firewall Management Center (FMC). This action separates the HA pair and ensures that the new replacement device can be registered and configured correctly.

Steps:

Access the FMC and navigate to the device management section.

Unregister the failed secondary device to remove it from the HA pair.

Register the replacement device to the FMC.

Reconfigure the HA settings to restore the high-availability configuration.

By unregistering the failed device first, the engineer ensures a clean setup for the replacement device, avoiding potential conflicts or issues in the HA configuration.

Disseminate: The dissemination phase publishes the results of the investigation or threat hunt. This information is disseminated with a focus on the receivers of the information. At the tactical level, this information feeds back into the beginning of the F3EAD model, Find. Figure 3 illustrates the F3EAD model.

To collect 24 hours ' worth of data using a packet capture on a Cisco Secure Firewall Threat Defense (FTD) appliance without prematurely stopping due to buffer size limitations, the engineer should increase the packet capture buffer size. The default buffer size is 32 MB, which is insufficient for extended captures.

Steps:

Access the packet capture configuration on the FTD device.

Increase the buffer size to 1 GB, which provides a significantly larger capacity for capturing packets over a 24-hour period.

Setting the buffer size to 1 GB should accommodate a substantial amount of traffic and prevent the capture from stopping prematurely.

To filter traffic between multiple subnets, the engineer must implement the firewall in routed mode. In routed mode, the firewall operates as a Layer 3 device, capable of routing traffic between different IP subnets. This mode is appropriate for filtering traffic between LAN, DMZ, and WAN subnets.

Steps to configure routed mode:

Access the firewall ' s management interface.

Configure interfaces for each subnet (LAN, DMZ, WAN) with appropriate IP addresses and network masks.

Define security zones and apply access control policies to filter traffic as required.

This ensures that the firewall can inspect and route traffic between the different subnets, providing the necessary security and control.

SNMP provides nonintrusive, read-only monitoring of Secure Firewall Threat Defense devices and is appropriate for collecting high-level device statistics without interrupting production traffic. An external network management system can poll supported Management Information Base objects to obtain CPU utilization, memory usage, interface statistics, Snort information, process status, high-availability state, and cluster health. SNMP traps can also report important events without requiring continuous manual access to the device. Malware reports focus on malicious files and malware events, while risk reports summarize security risks and attacks. Host reports describe discovered hosts, applications, operating systems, and vulnerabilities rather than overall device performance. Because the requirement concerns device-level statistics and minimizing operational disruption during peak season, SNMP monitoring is the most appropriate choice. Cisco Secure Firewall SNMP monitoring

================

Cisco Firepower uses FlexConfig objects to send NetFlow data. Here ' s the key point:

NetFlow_Set_Parameters object: Defines the parameters of the NetFlow data being exported (e.g., version, sampling rate).

NetFlow_Add_Destination object: Specifies the IP address and port of the flow collector (in this case, your Cisco Stealthwatch appliance) where the NetFlow data should be sent.

https://www.cisco.com/c/en/us/td/docs/security/firepower/620/configuration/guide/fpmc-config-guide-v62/firepower_management_center_high_availability.html

Cisco Secure Firewall Threat Defense supports IPsec encryption between the failover links of a high-availability pair. During HA configuration, the engineer enables encryption and selects the appropriate Key Generation method for IPsec. This protects failover and stateful synchronization data exchanged between the active and standby units. An SSL remote-access VPN is designed for user-to-network connectivity and is not used to protect an internal HA link. SSL is also not the documented encryption mechanism for Threat Defense failover synchronization. Clearing a commit queue does not encrypt or otherwise protect synchronized state information. Cisco’s HA configuration procedure explicitly instructs administrators to enable the encryption option and choose the Key Generation method for IPsec encryption between the failover links. Therefore, option B directly implements the required synchronization-protection mechanism. Cisco Secure Firewall high-availability configuration

To ensure that VoIP traffic in a contact center is not impacted by performance issues after deploying an access control policy on a Cisco Secure Firewall Threat Defense (FTD) device, the engineer should configure the access control rule with the " trust " action. The " trust " action allows traffic to bypass inspection and policy enforcement, ensuring that critical VoIP traffic is not delayed or degraded.

Steps:

In FMC, navigate toPolicies > Access Control > Access Control Policy.

Create a new rule or edit an existing rule.

Set the source and destination for the VoIP traffic.

Set the action to " trust " to ensure the VoIP traffic is not inspected.

By configuring the rule with the " trust " action, the VoIP traffic will be prioritized, maintaining the quality and performance required for the contact center operations.

In a passive IPS deployment for a Cisco Secure Firewall Threat Defense (FTD) device, the administrator must configure the interface to operate in passive mode. This involves setting the interface mode, associating it with a security zone, enabling the interface, and setting the MTU parameter.

Steps:

Set the interface mode to passive:

In FMC, navigate toDevices > Device Management.

Select the FTD device and configure the relevant interface.

Set the interface mode to " Passive. "

Associate the interface with a security zone:

Create or select an appropriate security zone.

Assign the passive interface to this security zone.

Enable the interface:

Ensure the interface is enabled to receive traffic.

Set the MTU parameter:

Configure the Maximum Transmission Unit (MTU) parameter as required.

This ensures that the FTD device can inspect traffic passively without impacting the network flow.

An inline set consists of paired Secure Firewall Threat Defense interfaces placed directly in the network traffic path. The interfaces operate like a bump in the wire: one interface receives the traffic, the inspection engine evaluates it, and the paired interface retransmits it unless an access-control, intrusion, file, or other security policy explicitly drops it. This arrangement enables the IPS to prevent attacks because the device can stop malicious packets before forwarding them. A passive interface also receives traffic unconditionally, but it receives copied traffic from a SPAN or mirror port and retransmits none of it. Routed and transparent modes describe broader firewall packet-forwarding behavior rather than this IPS-only interface characteristic. Therefore, an inline deployment satisfies the requirement to inspect, retransmit, and selectively drop traffic. Cisco inline-set documentation

================

A local SPAN configuration requires a numbered monitoring session with a source interface and a different destination interface. Gi0/1 is the switch interface whose traffic must be copied, while Gi0/3 is connected to the passive Cisco Secure IPS sensor and must therefore be the SPAN destination. Option C correctly associates both commands with session 1 and maps the monitored traffic from Gi0/1 to Gi0/3. Option B incorrectly makes Gi0/3 both the source and destination, which cannot provide the required monitoring path. Options A and D omit the mandatory session 1 portion of the Catalyst SPAN syntax. Because the IPS operates passively, it receives copies of packets on its monitoring interface without becoming an inline forwarding device and without being able to disrupt the production traffic.

================

To ensure that router R2 removes the directly connected route for 192.168.1.0/24 from its routing table when the cable between router R1 and the Secure FTD device is disconnected, the network engineer must implement the " Propagate Link State " option on the Secure FTD device. This option allows the FTD to propagate the link state changes to adjacent devices, ensuring that the disconnection is recognized and the routing table is updated accordingly.

Steps:

Access the FTD device configuration via FMC.

Navigate to the interface settings for the relevant interfaces.

Enable the " Propagate Link State " option for the interfaces connected to R1 and R2.

Deploy the changes to the FTD device.

This configuration ensures that the link state changes are communicated to router R2, prompting it to remove the disconnected route from its routing table.

Integrated routing and bridging (IRB) is a feature that allows you to route between different bridge groups on a Cisco FTD device. A bridge group is a logical interface that acts as a container for one or more physical or logical interfaces that belong to the same layer 2 broadcast domain. You can assign an IP address to a bridge group interface (BVI) and enable routing protocols on it, just like a regular routed interface. However, when you run a dynamic routing protocol on a Cisco FTD device in IRB mode, you can only use nonbridge interfaces as routing peers. You cannot use bridge group interfaces or bridge group member interfaces as routing peers2. This is because the routing protocol packets are sent and received on the nonbridge interfaces, and the bridge group interfaces are used only for forwarding data traffic3.

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.

To change the mode of a Cisco Secure Firewall Threat Defense (FTD) device in the Cisco Secure Firewall Management Center (FMC) inventory, the engineer must follow these steps:

Register the Secure FTD with Secure FMC.

Change the firewall mode.

Deregister the Secure FTD device from Secure FMC.

To perform these actions, accessing the Secure FTD CLI from the console port is necessary. This allows the engineer to execute the required commands to change the firewall mode and manage the registration status of the FTD device.

Steps:

Connect to the Secure FTD device via the console port.

Access the CLI and execute the command to change the firewall mode (configure firewall-mode).

Deregister the device from FMC if needed.

Register or re-register the device with FMC as required.

Transparent mode allows the FTD device to act as a “bump in the wire” that does not affect the IP addressing of the network. The end user workstations will not need any changes to their configuration, as they will still receive an IP address from the same DHCP server. However, the FTD device must allow DHCP traffic in the access control policies, otherwise it will block the DHCP requests and replies1

To ensure high availability of internet access when deploying a pair of Cisco Secure Firewall Threat Defense (FTD) devices managed by Cisco Secure Firewall Management Center (FMC), the following features must be deployed:

Route Tracking:This feature monitors the reachability of a specified target (such as an external IP address) through the configured routes. If the route to the target is lost, the FTD can dynamically adjust the routing to use an alternate path, ensuring continuous internet access.

SLA Monitor:Service Level Agreement (SLA) monitoring works alongside route tracking to continuously verify the status and performance of the internet links. If the SLA for one of the ISP links fails (indicating the link is down or underperforming), the FTD can switch traffic to the secondary ISP link.

Steps to configure:

In FMC, navigate toDevices > Device Management.

Select the FTD device and configure route tracking to monitor the ISP links.

Configure SLA monitors to continuously check the health and performance of the internet circuits.

These configurations ensure that internet access remains available to users even if one of the ISPs goes down.

Explanation

If inside clients have intermittent connectivity issues and the Cisco Secure FTD is responding to all ARP requests on the inside network, it indicates that there may be an incorrect proxy ARP configuration in the NAT policy. Proxy ARP can cause the FTD to respond to ARP requests on behalf of other devices, leading to connectivity issues.

Steps to resolve:

Review the NAT policy on the FTD to identify any incorrect proxy ARP configurations.

Disable the proxy ARP setting for the relevant NAT rules that are causing the issue.

This ensures that the FTD only responds to ARP requests as needed, preventing it from interfering with normal ARP traffic on the inside network.

When configuring a custom widget on a dashboard within Cisco Secure Firewall Management Center (FMC), it is mandatory to provide a title for the system to display the information correctly. The title helps in identifying and organizing the widget on the dashboard.

Steps:

Navigate to the dashboard section in FMC.

Add a new custom widget.

Configure the widget settings and provide a title.

Save and apply the widget to the dashboard.

Providing a title ensures that the widget is correctly displayed and easily identifiable on the dashboard.

https://www.cisco.com/c/en/us/support/docs/security/firepower-management-center/212702-configure-and-verify-nat-on-ftd.html

https://www.cisco.com/c/en/us/td/docs/security/firepower/640/configuration/guide/fpmc-config-guide-v64/system_configuration.html#ID-2241-00000551

“You cannot send backups to one remote system and reports to another, but you can choose to send either to a remote system and store the other on the Firepower Management Center.”

If an engineer receives a 403: Forbidden error when attempting to download a packet capture file from Cisco Secure Firewall Management Center (FMC), the issue is likely due to HTTPS not being enabled in the device platform policy. To resolve this issue, the engineer must enable HTTPS in the platform policy.

Steps:

In FMC, navigate toPolicies > Device Management > Platform Settings.

Edit the relevant platform policy.

Enable HTTPS for the device.

Deploy the changes to the FTD device.

This ensures that the FMC and FTD device can securely transfer the packet capture file over HTTPS, resolving the 403 error.

In a local SPAN configuration, the source is the switch interface whose traffic must be copied, while the destination is the interface connected to the passive monitoring device. Therefore, switch interface Gi0/1 must be configured as the SPAN source, and switch interface Gi0/3, which connects to the Cisco Secure IPS sensor, must be the destination. Both commands must also reference the same SPAN session number. Option D satisfies all these requirements. Options B and C omit the mandatory session number, while Option A incorrectly assigns Gi0/3 as both the source and destination. A SPAN destination cannot simultaneously be a source in the same session. The passive IPS receives the mirrored packets for inspection but does not retransmit or directly block them. Cisco SPAN configuration documentation

Traditionally, a firewall is a routed hop and acts as a default gateway for hosts that connect to one of its screened subnets. A transparent firewall, on the other hand, is a Layer 2 firewall that acts like a “bump in the wire,” or a “stealth firewall,” and is not seen as a router hop to connected devices. However, like any other firewall, access control between interfaces is controlled, and all of the usual firewall checks are in place. Layer 2 connectivity is achieved by using a " bridge group " where you group together the inside and outside interfaces for a network, and the ASA uses bridging techniques to pass traffic between the interfaces. Each bridge group includes a Bridge Virtual Interface (BVI) to which you assign an IP address on the network. You can have multiple bridge groups for multiple networks. In transparent mode, these bridge groups cannot communicate with each other.https://www.cisco.com/c/en/us/td/docs/security/asa/asa97/configuration/general/asa-97-general-config/intro-fw.html

When configuring a new report template based on a saved search in Cisco Secure Firewall Management Center (FMC), it is important to note that saved searches are specific to the report template they were created with. Saved searches cannot be freely used across different report templates.

To use a different type of saved search, you must ensure that it aligns with the specific report template being used. This restriction ensures that the saved search parameters match the report ' s data requirements.