NO.34 Exhibit: Referring to the exhibit, which two statements are correct?
Referring to the exhibit, the following statements are correct: B) All of the entries are command and control entries. Command and control entries are dynamic addresses that represent the IP addresses of servers that are used by malware to communicate with infected hosts. The SRX Series device can block or log the traffic to or from these IP addresses based on the security policies. The exhibit shows that all of the entries have the category DC/1, which stands for command and control1. C) All of the entries are Dshield entries. Dshield is a feed source that provides a list of IP addresses that are associated with malicious activities, such as scanning, spamming, or attacking. The SRX Series device can download the Dshield feed and use it to populate the dynamic address entries. The exhibit shows that all of the entries have the feed dshield, which indicates that they are from the Dshield feed source2. The other statements are incorrect because: A) All of the entries are not a threat level 8, but a threat level 10. The threat level is a numeric value that indicates the severity of the threat associated with a dynamic address entry. The higher the threat level, the more dangerous the threat. The SRX Series device can use the threat level to prioritize the actions for the dynamic address entries. The exhibit shows that all of the entries have the cc CN, which stands for country code China. According to the Juniper documentation, the country code China has a threat level of 10, which is the highest. D) All of the entries are not a threat level 10, but they are. See the explanation for option A. Reference: Understanding Dynamic Address Categories Understanding Dynamic Address Feed Sources [Understanding Dynamic Address Threat Levels]
NO.50 Exhibit: Referring to the exhibit, your company’s infrastructure team implemented new printers. To make sure that the policy enforcer pushes the updated Ip address list to the SRX. Which three actions are required to complete the requirement? (Choose three)
Referring to the exhibit, your company’s infrastructure team implemented new printers. To make sure that the policy enforcer pushes the updated IP address list to the SRX, you need to perform the following actions: A) Configure the server feed URL as http://172.25.10.254/myprinters. The server feed URL is the address of the remote server that provides the custom feed data. You need to configure the server feed URL to match the location of the file that contains the IP addresses of the new printers. In this case, the file name is myprinters and the server IP address is 172.25.10.254, so the server feed URL should be http://172.25.10.254/myprinters1. B) Create a security policy that uses the dynamic address feed to allow access. A security policy is a rule that defines the action to be taken for the traffic that matches the specified criteria, such as source and destination addresses, zones, protocols, ports, and applications. You need to create a security policy that uses the dynamic address feed as the source or destination address to allow access to the new printers. A dynamic address feed is a custom feed that contains a group of IP addresses that can be entered manually or imported from external sources. The dynamic address feed can be used in security policies to either deny or allow traffic based on either source or destination IP criteria2. C) Configure Security Director to create a dynamic address feed. Security Director is a Junos Space application that enables you to create and manage security policies and objects. You need to configure Security Director to create a dynamic address feed that contains the IP addresses of the new printers. You can create a dynamic address feed by using the local file or the remote file server option. In this case, you should use the remote file server option and specify the server feed URL as http://172.25.10.254/myprinters3. The other options are incorrect because: D) Configuring Security Director to create a C&C feed is not required to complete the requirement. A C&C feed is a security intelligence feed that contains the IP addresses of servers that are used by malware or attackers to communicate with infected hosts. The C&C feed is not related to the new printers or the dynamic address feed. E) Configuring the server feed URL as https://172.25.10.254/myprinters is not required to complete the requirement. The server feed URL can use either the HTTP or the HTTPS protocol, depending on the configuration of the remote server. In this case, the exhibit shows that the remote server is using the HTTP protocol, so the server feed URL should use the same protocol1. Reference: Configuring the Server Feed URL Dynamic Address Overview Creating Custom Feeds [Command and Control Feed Overview]
NO.54 Exhibit: Referring to the exhibit, what do you use to dynamically secure traffic between the Azure and AWS clouds?
Security tags facilitate dynamic traffic management between cloud environments like Azure and AWS. Tags allow flexible policies that respond to cloud-native events or resource changes, ensuring secure inter-cloud communication. For more information, see Juniper Cloud Security Tags. In the scenario depicted in the exhibit, where traffic needs to be dynamically secured between Azure and AWS clouds, the best method to achieve dynamic security is by using security tags in the security policies. Security tags allow dynamic enforcement of security policies based on metadata rather than static IP addresses or zones. This is crucial in cloud environments, where resources and IP addresses can change dynamically. Using security tags in the security policies, you can associate traffic flows with specific applications, services, or virtual machines, regardless of their underlying IP addresses or network locations. This ensures that security policies are automatically updated as cloud resources change.
NO.55 Exhibit: Referring to the flow logs exhibit, which two statements are correct? (Choose two.)
* Understanding the Flow Log Output: From the flow logs in the exhibit, we can observe the following key events: * The session creation was initiated (flow_first_create_session), but the policy searchfailed (flow_first_policy_search), which implies that no matching policy was found between the zones involved (zone trust-> zone dmz). * The packet was dropped with the reason “denied by policy.” This shows that the packet was dropped either due to no matching security policy or because the default policy denies the traffic (packet dropped, denied by policy). * The line denied by policy default-policy-logical-system-00(2) indicates that the default security policy is responsible for denying the traffic, confirming that no explicit security policy was configured to allow this traffic. * Explanation of Answer A (Dropped by the default security policy): The log message clearly states that the packet was dropped by the default security policy (default-policy- logical-system-00). In Junos, when a session is attempted between two zones and no explicit policy exists to allow the traffic, the default policy is to deny the traffic. This is a common behavior in Junos OS when a security policy does not explicitly allow traffic between zones. * Explanation of Answer D (Requires traceoptions flag of basic-datapath): The information displayed in the log involves session creation, flow policy search, and packet dropping due to policy violations, which are all part of basic packet processing in the data path. This type of information is logged when the traceoptions flag is set tobasic-datapath. The basic-datapath traceoption provides detailed information about the forwarding process, including policy lookups and packet drops, which is precisely what we see in the exhibit. * The traceoptions flaghost-traffic(Answer C) is incorrect because host-traffic is typically used for traffic destined to or generated from the Junos device itself (e.g., SSH or SNMP traffic to the SRX device), not for traffic passing through the device. * To capture flow processing details like those shown, you need the basic-datapath traceoptions flag, which provides details about packet forwarding and policy evaluation. Step-by-Step Configuration for Tracing (Basic-Datapath): * Enable flow traceoptions: To capture detailed information about how traffic is being processed, including policy lookups and flow session creation, enable traceoptions for the flow. bash Copy code set security flow traceoptions file flow-log set security flow traceoptions flag basic-datapath * Apply the configuration and commit: bash Copy code commit * View the logs: Once enabled, you can check the trace logs for packet flows, policy lookups, and session creation details: bash Copy code show log flow-log This log will contain information similar to the exhibit, including session creation attempts and packet drops due to security policy. Juniper Security Reference: * Default Security Policies: Juniper SRX devices have a default security policy to deny all traffic that is not explicitly allowed by user-defined policies. This is essential for security best practices. Reference: Juniper Networks Documentation on Security Policies. * Traceoptions for Debugging Flows: Using traceoptions is crucial for debugging and understanding how traffic is handled by the SRX, particularly when issues arise from policy misconfigurations or routing. Reference: Juniper Traceoptions. By using the basic-datapath traceoptions, you can gain insights into how the device processes traffic, including policy lookups, route lookups, and packet drops, as demonstrated in the exhibit.