JNCIP-SEC JN0-636 Updated Exam

To modify the configuration to fulfill the requirements, you need to modify the log-all term to add the next term action. The other options are incorrect because:

• B. Deleting the log-all term would prevent logging all traffic, which is one of the requirements. The log-all term matches all traffic from any source address and logs it to the system log file1.
• C. Adding a term before the log-all term that blocks Telnet would also prevent logging all traffic, because the log-all term would never be reached. The firewall filter evaluates the terms in sequential order and applies the first matching term. If a term before the log-all term blocks Telnet, then the log-all term would not match any traffic and no logging would occur2.
• D. Applying a firewall filter to the loopback interface that blocks Telnet traffic would not block inbound Telnet traffic on interface ge-0/0/3, which is another requirement. The loopback interface is a logical interface that is always up and reachable. It is used for routing and management purposes, not for filtering traffic on physical interfaces3.

Therefore, the correct answer is A. You need to modify the log-all term to add the next term action. The next term action instructs the firewall filter to continue evaluating the subsequent terms after matching the current term. This way, the log-all term would log all traffic and then proceed to the block-telnet term, which would block only inbound Telnet traffic on interface ge-0/0/34. To modify the log-all term to add the next term action, you need to perform the following steps:

• Enter the configuration mode: user@host> configure
• Navigate to the firewall filter hierarchy: user@host# edit firewall family inet filter block-telnet
• Add the next term action to the log-all term: user@host# set term log-all then next term
• Commit the changes: user@host# commit

References:

• log (Firewall Filter Action)
• Firewall Filter Configuration Overview
• loopback (Interfaces)
• next term (Firewall Filter Action)

Juniper ATP Cloud performs cache lookup to see if the file is seen already and known to be malicious and dynamic analysis to see what happens if you execute the file in a real environment.

• Cache lookup is one of the functions that Juniper ATP Cloud performs to analyze and detect malware. Cache lookup is the first step in the pipeline approach that Juniper ATP Cloud uses to examine files. Cache lookup checks whether the file has been seen before and whether it has a stored verdict in the database. If the file is known to be malicious, the verdict is returned to the SRX Series Firewall and the file is dropped. If the file is not found in the cache, the analysis continues with the other techniques1.
• Dynamic analysis is another function that Juniper ATP Cloud performs to analyze and detect malware. Dynamic analysis runs the file in a sandbox environment and observes its behavior and actions. Dynamic analysis can reveal the hidden or obfuscated functionality of malware, such as network connections, file modifications, registry changes, and process injections. Dynamic analysis can also detect zero-day threats and evasive malware that try to avoid static analysis1.

References:

• How is Malware Analyzed and Detected? | ATP Cloud | Juniper Networks

https://www.juniper.net/documentation/us/en/software/junos/multicast-l2/topics/ref/statement/family-ethernet-switching-edit-interfaces-qfx-series.html#statement-name-statement__d26608e73