JN0-636 Exam Dumps - Juniper JNCIP-SEC Questions and Answers

The Juniper ATP Appliance platform collects, inspects and analyzes advanced and stealthy web, file, and email-based threats that exploit and infiltrate client browsers, operating systems, emails and applications. Juniper ATP Appliance’s detection of malicious attacks generates incident and event details that can be sent to connected SIEM platforms in CEF, LEEF or Syslog formats1. CEF (Common Event Format) is an open log management standard that improves the interoperability of security-related information from different vendors2. Juniper ATP Appliance supports CEF format for sending events and system audit notifications to SIEM servers. You can configure the CEF format in the Juniper ATP Appliance Central Manager WebUI Config > Notifications > SIEM Settings1. Therefore, the correct answer is C. CEF is a supported logging output format for Juniper ATP Appliance. The other options are incorrect because:

• A. WELF (WebTrends Enhanced Log Format) is a proprietary log format developed by WebTrends Corporation for web analytics3. Juniper ATP Appliance does not support WELF format for SIEM integration.
• B. JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans and machines to read and write4. Juniper ATP Appliance supports JSON format for HTTP API results, but not for SIEM notifications1.
• D. Binary is a numeric system that uses only two digits: 0 and 1. Binary is not a logging output format for Juniper ATP Appliance or any SIEM platform.

References:

• SIEM Syslog, LEEF and CEF Logging
• Common Event Format Configuration Guide
• WebTrends Enhanced Log Format
• JSON

To share threat intelligence from your environment with third party tools, you need to enable Juniper ATP Cloud to share threat intelligence and configure application tokens in the Juniper ATP Cloud to limit who has access. The other options are incorrect because:

• A. Configuring application tokens in the SRX Series firewalls is not necessary or sufficient to share threat intelligence with third party tools. Application tokens are used to authenticate and authorize requests to the Juniper ATP Cloud API, which can be used to perform various operations such as submitting files, querying C&C feeds, and managing allowlists and blocklists1. However, to share threat intelligence with third party tools, you need to enable the TAXII service in the Juniper ATP Cloud, which is a different protocol for exchanging threat information2.
• D. Enabling SRX Series firewalls to share threat intelligence with third party tools is not possible or supported. SRX Series firewalls can send potentially malicious objects and files to the Juniper ATP Cloud for analysis and receive threat intelligence from the Juniper ATP Cloud to block malicious traffic3. However, SRX Series firewalls cannot directly share threat intelligence with third party tools. You need to use the Juniper ATP Cloud as the intermediary for threat intelligence sharing.

Therefore, the correct answer is B and C. You need to enable Juniper ATP Cloud to share threat intelligence and configure application tokens in the Juniper ATP Cloud to limit who has access. To do so, you need to perform the following steps:

• Enable and configure the TAXII service in the Juniper ATP Cloud. TAXII (Trusted Automated eXchange of Indicator Information) is a protocol for communication over HTTPS of threat information between parties. STIX (Structured Threat Information eXpression) is a language used for reporting and sharing threat information using TAXII. Juniper ATP Cloud can contribute to STIX reports by sharing the threat intelligence it gathers from file scanning. Juniper ATP Cloud also uses threat information from STIX reports as well as other sources for threat prevention2. To enable and configure the TAXII service, you need to select Configure > Threat Intelligence Sharing in the Juniper ATP Cloud WebUI, move the knob to the right to Enable TAXII, and move the slidebar to designate a file sharing threshold2.
• Configure application tokens in the Juniper ATP Cloud. Application tokens are used to authenticate and authorize requests to the Juniper ATP Cloud API and the TAXII service. You can create and manage application tokens in the Juniper ATP Cloud WebUI by selecting Configure > Application Tokens. You can specify the name, description, expiration date, and permissions of each token. You can also revoke or delete tokens as needed. You can use the application tokens to limit who has access to your shared threat intelligence by granting or denying permissions to the TAXII service1.

References:

• Threat Intelligence Open API Setup Guide
• Configure Threat Intelligence Sharing
• About Juniper Advanced Threat Prevention Cloud

The exhibit shows a security policy configuration with a threshold of 1000 policy violations by a source network identifier and a threshold of 10 policy violations to an application within a specified period. If either of these thresholds are exceeded, an alarm will be generated. Therefore, the correct answer is A and D. The other options are incorrect because:

• B. The ratio of policy violation traffic compared to accepted traffic is not a criterion for triggering an alarm. The security policy configuration does not specify any ratio or percentage of policy violation traffic that would cause an alarm.
• C. The number of policy violation by a destination TCP port is also not a criterion for triggering an alarm. The security policy configuration does not specify any threshold or duration for policy violation by a destination TCP port.

References:

• policy (Security Alarms)
• Monitoring Security Policy Violations

The correct action to solve this problem on the SRX device is to refresh the feed in ATP Cloud. This is because the number of IP address entries in the monitoring section of the Juniper ATP Cloud portal does not match the number of entries locally on the SRX Series device. This discrepancy can be caused by a number of factors, such as the SRX device not being properly configured for Adaptive Threat Profiling, or the feed not being properly downloaded from the Juniper ATP Cloud portal. By refreshing the feed in ATP Cloud, the SRX device can synchronize its local feed with the latest feed from the cloud service and ensure that the entries are consistent and accurate. References: Juniper Security, Professional (JNCIP-SEC) Reference Materials source and documents: https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/security-adaptive-threat-profiling-configuring.html

The two steps that will fulfill the requirement of deploying a security policy on an SRX Series device that blocks all known Tor network IP addresses are enrolling the devices with Juniper ATP Cloud and enabling a third-party Tor feed. Juniper ATP Cloud is a cloud-based service that provides advanced threat detection and mitigation capabilities for SRX Series devices. By enrolling the devices with Juniper ATP Cloud, the devices can leverage the cloud intelligence and analytics to identify and block malicious traffic, including Tor traffic. A third-party Tor feed is a source of information that provides a list of IP addresses that are associated with the Tor network. By enabling a third-party Tor feed on the SRX Series device, the device can use the feed to create a dynamic address object that contains all the known Tor IP addresses. The device can then apply a security policy that denies traffic from or to the dynamic address object, effectively blocking the Tor network IP addresses. References: Juniper Security, Professional (JNCIP-SEC) Reference Materials source and documents: https://www.juniper.net/documentation/en_US/junos/topics/concept/security-atp-cloud-overview.html https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/security-intelligence-third-party-feed-configuring.html

• To solve the problem of using the same IPv4 address space as your company, you can identify two neutral IPv4 address spaces for address translation. This will allow you to use the same IPv4 address space as your company without any conflicts. Additionally, you can configure static NAT on the SRX Series devices to ensure that the traffic is properly routed between the two networks.
• Static NAT is a type of network address translation that maps a private IP address to a public IP address on a one-to-one basis. Static NAT is useful when you need to expose a server or device with a private IP address to the Internet or another network with a different IP address range. Static NAT also preserves the original source or destination IP address in the packet header, which can be useful for logging or auditing purposes1.
• Neutral IPv4 address spaces are IP address ranges that are not assigned to any specific organization or entity. They are usually reserved for special purposes, such as private networks, multicast, loopback, or documentation. Neutral IPv4 address spaces can be used for address translation when there is an overlap or conflict between two networks that need to communicate with each other. For example, you can use the 10.0.0.0/8, 172.16.0.0/12, or 192.168.0.0/16 address ranges, which are designated for private use, as neutral IPv4 address spaces for address translation2.

References:

• SRX Getting Started - Configure VPN tunnel for site-to-site connectivity
• SRX & J Series Site-to-Site VPN Configurator
• Resolution Guide – SRX - Troubleshoot Static NAT
• RFC 1918 - Address Allocation for Private Internets

According to the Juniper documentation, filter-based forwarding (FBF) is a technique that allows the SRX Series device to forward packets based on firewall filter rules, rather than the default routing table1. FBF can be used to implement policy-based routing, load balancing, or traffic engineering2. To deploy FBF on the SRX Series device for incoming traffic sourced from the 10.10.100.0/24 network, the following steps are required:

• You must create a forwarding-type routing instance. A forwarding-type routing instance is a special type of routing instance that is used for FBF. It does not have any interfaces or routing protocols associated with it, but it has its own routing table that can be populated by static routes, RIB groups, or routing policies3. You can create a forwarding-type routing instance by using the following command:

set routing-instances instance-type forwarding

• You must create and apply a firewall filter that matches on the source address 10.10.100.0/24 and then sends this traffic to your routing instance. A firewall filter is a set of rules that can match on various packet attributes, such as source and destination addresses, ports, protocols, and so on. You can use the then routing-instance action to specify the routing instance that the packet should be forwarded to4. You can create and apply a firewall filter by using the following commands:

set firewall family inet filter term from source-address 10.10.100.0/24 set firewall family inet filter term then routing-instance  set interfaces unit family inet filter input

• You must create a RIB group that adds interface routes to your routing instance. A RIB group is a mechanism that allows you to import routes from one routing table to another. You can use a RIB group to add the interface routes of the ingress interface to the routing table of the forwarding-type routing instance. This will ensure that the SRX device can forward the packets to the correct next hop based on the destination address5. You can create a RIB group by using the following commands:

set routing-options rib-groups import-rib inet.0 set routing-options rib-groups import-rib .inet.0 set routing-instances routing-options instance-import

The following steps are not required or incorrect:

• You do not need to create a VRF-type routing instance. A VRF-type routing instance is a type of routing instance that is used for virtual routing and forwarding. It allows you to create multiple logical routers on the same physical device, each with its own interfaces, routing protocols, and routing tables. VRF-type routing instances are typically used for VPNs, MPLS, or network segmentation. However, they are not necessary for FBF, which can be achieved with a forwarding-type routing instance.
• You do not need to create and apply a firewall filter that matches on the destination address 10.10.100.0/24 and then sends this traffic to your routing instance. This would be redundant and unnecessary, as the destination address of the incoming traffic is already determined by the routing table of the forwarding-type routing instance. Moreover, this would create a loop, as the traffic would be sent back to the same routing instance that it came from.

References: 1: Filter-Based Forwarding Overview 2: Configuring Filter-Based Forwarding 3: forwarding (Routing Instances) 4: routing-instance (Firewall Filter Action) 5: Configuring RIB Groups : [vrf (Routing Instances)]

• The SRX Series device is performing both source and destination NAT on this session because the traceoptions output shows that both source and destination IP addresses and ports are translated. The source IP address 192.168.5.2 is translated to 192.168.100.1 and the destination IP address 1.1.1.1 is translated to 192.168.5.1. The source port 0 is translated to 14777 and the destination port 80 is translated to 80. The traceoptions output also shows the rule and pool IDs for both source and destination NAT: 2/32770 and 1/1 respectively.
• This is the first packet in the session because the traceoptions output shows the flag flow_first_packet, which indicates that this is the first packet of a new session. The traceoptions output also shows the flag flow_first_src_xlate and flow_first_rule_dst_xlate, which indicate that this is the first time that source and destination NAT are applied to this session.

References:

• traceoptions (Security NAT) | Junos OS | Juniper Networks
• [SRX] How to interpret Flow TraceOptions output for NAT troubleshooting