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

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.

To block traffic to known cryptomining networks using Cisco Secure Firewall Threat Defense (FTD) managed by Cisco Secure Firewall Management Center (FMC), the network administrator needs to configure Security Intelligence in an Access Control Policy. Security Intelligence allows administrators to block traffic based on threat intelligence feeds, which include known malicious IP addresses, domains, and URLs.

Steps:

Navigate toPolicies > Access Control > Access Control Policyin FMC.

Edit or create an Access Control Policy.

Go to theSecurity Intelligencetab.

Enable the relevant threat intelligence feeds that include cryptomining networks.

Apply the policy to the FTD device.

This configuration ensures that traffic to known cryptomining networks is blocked, enhancing the network's security posture against cryptomining threats.

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When connectivity issues are detected between Cisco Secure Firewall Management Center (FMC) and Cisco Secure Firewall Threat Defense (FTD) devices, and initial troubleshooting indicates that heartbeats and events are not being received, the engineer can run the following commands to resolve the issue by re-establishing secure channels and checking process statuses:

manage_procs.pl:This script is used to manage and restart processes on the FTD device. Running this script can help restart any malfunctioning processes and re-establish connectivity between the FMC and FTD.

sudo stats_unified.pl:This command provides detailed statistics and status of the unified system processes. It helps in diagnosing and resolving issues related to the secure channel and event reporting.

Steps:

Access the FTD CLI.

Run the commandmanage_procs.plto restart processes.

Run the commandsudo stats_unified.plto gather detailed process statistics and verify the status.

These commands help resolve connectivity issues by ensuring that all necessary processes are running correctly and secure channels are re-established.