Acceptable Modifiers for Firewall Filters
Question
What are three acceptable modifiers to a terminating action of a firewall filter? (Choose three.)
Answers
Explanations
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A. B. C. D. E.ABD
In Junos OS, a firewall filter is used to control and manage the flow of network traffic. A firewall filter can take various actions on the traffic that matches specific conditions. One of the primary actions that a firewall filter can take is terminating action, which stops the processing of the packet and takes the appropriate action.
Here are the explanations for the three acceptable modifiers to a terminating action of a firewall filter:
A. Policer: A policer is an action that limits the rate of incoming or outgoing traffic based on a predefined rate. A firewall filter can use a policer to enforce bandwidth limitations, prevent denial-of-service (DoS) attacks, or prioritize critical traffic over non-critical traffic.
B. Count: The count action is used to keep track of how many times a particular filter rule is matched. The count action does not affect the processing of the packet in any way. It is useful for monitoring and troubleshooting network traffic.
C. Syslog: Syslog is a standard protocol used for logging messages generated by network devices. A firewall filter can use the syslog action to send a log message to a syslog server when a packet matches a specific filter rule. Syslog messages can be used for monitoring, troubleshooting, and security auditing purposes.
D. Log: The log action is similar to the syslog action in that it generates a log message when a packet matches a specific filter rule. However, the log action generates a log message locally on the device, whereas the syslog action sends the log message to a syslog server.
E. Discard: The discard action drops the packet and does not send any response back to the source. This action is useful for blocking unwanted traffic or preventing DoS attacks.
In summary, the three acceptable modifiers to a terminating action of a firewall filter are policer, count, and syslog. The policer action is used to limit the rate of traffic, count action is used for monitoring and troubleshooting, and syslog action is used for logging messages.
