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Question 368 - PCNSE discussion

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Which function does the HA4 interface provide when implementing a firewall cluster which contains firewalls configured as active-passive pairs?

A.
Perform packet forwarding to the active-passive peer during session setup and asymmetric traffic flow.
Answers
A.
Perform packet forwarding to the active-passive peer during session setup and asymmetric traffic flow.
B.
Perform synchronization of routes, IPSec security associations, and User-ID information.
Answers
B.
Perform synchronization of routes, IPSec security associations, and User-ID information.
C.
Perform session cache synchronization for all HA cluster members with the same cluster ID.
Answers
C.
Perform session cache synchronization for all HA cluster members with the same cluster ID.
D.
Perform synchronization of sessions, forwarding tables, and IPSec security associations between firewalls in an HA pair.
Answers
D.
Perform synchronization of sessions, forwarding tables, and IPSec security associations between firewalls in an HA pair.
Suggested answer: D

Explanation:

In a High Availability (HA) configuration, particularly in an active-passive setup, it's crucial that the passive unit is kept up to date with the current state of the active unit. This ensures a seamless transition in the event of a failover. The HA4 interface is dedicated to this synchronization task.

D) Perform synchronization of sessions, forwarding tables, and IPSec security associations between firewalls in an HA pair:

The HA4 interface is responsible for the synchronization of critical stateful information between the active and passive units in an HA pair. This includes session information, ensuring that the passive unit can continue existing sessions without interruption if it needs to become active.

In addition to session information, HA4 also synchronizes forwarding tables, which contain information on how to route packets, and IPSec security associations, which are necessary for maintaining secure VPN tunnels.

This synchronization ensures that both units in an HA pair have identical information regarding the current state of the network, sessions, and security associations, enabling a smooth and immediate transition to the passive unit in case the active unit fails.

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asked 23/09/2024
Frau Abir Bouassida
34 questions
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