Juniper JN0-636 Practice Test - Questions Answers, Page 4

According to the Juniper documentation, reflexive NAT is a type of source NAT that allows an internal host to communicate with an external host using a single public IP address and port. The reflexive NAT session is created when the internal host initiates the traffic to the external host, and the session is deleted when the traffic stops. The reflexive NAT session is bidirectional, meaning that the external host can send traffic back to the internal host using the same public IP address and port that the internal host used to reach the external host. However, the external host cannot initiate a new session to the internal host using the same public IP address and port, unless the internal host has already established a session with the external host. Therefore, only the Internet host that the internal host originally communicated with can initiate traffic to reach the internal host using the 203.0.113.1 address, a random source port, and destination port 54311. Reference: [Configuring Reflexive NAT]

An IKE security association (SA) is a set of parameters that define how the Internet Key Exchange (IKE) protocol will authenticate and establish the secure channel between the IPsec VPN peers. When you configure an IPsec VPN, one IKE SA is created between the peers, regardless of how many CoS forwarding classes are used to separate the traffic. The SA will be used to negotiate the IPsec SA parameters, such as encryption algorithms and keys.

In this scenario, only 1 IKE security association is required between the IPsec peers, no matter how many CoS forwarding classes are used to separate the voice and data traffic.

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. Reference: Juniper Security, Professional (JNCIP-SEC) Reference Materials source and documents:

https://www.juniper.net/documentation/en_US/junos/topics/concept/security-atp-cloudoverview.html

https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/securityintelligence-third-party-feed-configuring.html

Juniper ATP Cloud provides zero-day malware protection for non-Juniper firewalls. It's a cloud-based service that analyzes files and network traffic to detect and prevent known and unknown (zero-day) threats. It uses a combination of static and dynamic analysis techniques, as well as machine learning, to detect and block malicious files, even if they are not known to traditional anti-virus software. It also provides real-time visibility and detailed forensics for incident response and remediation.

According to the Juniper documentation, the local identity for an IPsec VPN tunnel must match the remote identity of the peer device. The local identity can be configured as an IP address, a hostname, a distinguished name, or an advpn identifier. The advpn identifier is used for dynamic VPNs that support multiple remote endpoints. In the exhibit, the corporate device has the local identity configured as inet advpn, which means it expects the branch1 device to have the same remote identity. However, the branch1 device has the local identity configured as inet, which does not match the corporate device's remote identity. Therefore, the IKE negotiation fails and the IPsec tunnel is not established. To solve this problem, the local identity on the branch1 device should be changed to inet advpn, so that it matches the corporate device's remote identity. Reference: [Configuring an IKE Gateway] 1, [Configuring Local and Remote Identities] 2

1: https://www.juniper.net/documentation/us/en/software/junos/vpnipsec/topics/task/configuration/security-ike-gateway-configuring.html 2:

https://www.juniper.net/documentation/us/en/software/junos/vpn-ipsec/topics/topicmap/security-ipsec-vpn-identities.html

The exhibit shows the output of the show security intelligence category summary command on the SRX-1 device. This command displays the status of the security intelligence categories configured on the device. In the output, we can see that there are two categories configured - Proxy_Nodes and Proxy_Node3. The Proxy_Nodes category is a custom category that is created by the SRX-1 device using the adaptive threat profiling feature. The Proxy_Node3 category is a third-party category that is downloaded from the Juniper ATP Cloud service. The Proxy_Nodes category contains the IP addresses that match the security policy named Proxy-ATP on the SRX-1 device. The Proxy_Node3 category contains the IP addresses that are associated with the Tor network.

The two statements that are true based on the exhibit are:

The SRX-1 device creates the Proxy_Nodes feed, so it cannot use it in another security policy. This is because the adaptive threat profiling feature does not allow the device that creates the feed to use it in another security policy. The feed is intended to be shared with other devices in the same realm through the Juniper ATP Cloud service. The SRX-1 device can only use the feeds that are created by other devices or downloaded from third-party sources.

You can only use the Proxy_Node3 feed as the destination-address match criteria of another security policy on a different SRX Series device. This is because the Proxy_Node3 feed is a third-party feed that is downloaded from the Juniper ATP Cloud service. The SRX-1 device can use this feed as a dynamic address object in its security policies. However, the feed is configured with the destinationonly option, which means that it can only be used as the destination-address match criteria of a security policy. The source-address match criteria of a security policy cannot use this feed.

Reference: Juniper Security, Professional (JNCIP-SEC) Reference Materials source and documents:

https://www.juniper.net/documentation/en_US/junos/topics/reference/command-summary/showsecurity-intelligence-category-summary.html

https://www.juniper.net/documentation/en_US/junos/topics/concept/security-intelligence-thirdparty-feed-configuring.html

https://www.juniper.net/documentation/en_US/junos/topics/concept/security-adaptive-threatprofiling-overview.html

According to the Juniper documentation, a tenant system is a logical system that supports routing, services, and security features. A tenant system can be configured to log binary security events to a remote server using the pi security profile. The pi security profile specifies the tenant name, the server address, the server port, and the protocol for logging binary security events. In the exhibit, the pi security profile is configured with the server address 10.0.0.1, the server port 514, and the protocol UDP. However, the tenant name is missing from the configuration. To complete the configuration, the tenant name must be configured as local for the pi security profile. This is because the local tenant name is used to identify the tenant system that is sending the binary security events to the remote server. Therefore, the correct statement to complete the configuration is D. Configure the tenant as local for the pi security profile. Reference: [Tenant Systems Overview] 1, [Configuring Binary Security Event Logging for Tenant Systems] 2

1: https://www.juniper.net/documentation/us/en/software/junos/logical-systemsecurity/topics/topic-map/tenant-systems-overview.html

2: https://www.juniper.net/documentation/us/en/software/junos/logical-systemsecurity/ topics/task/security-tenant-systems-binary-logging-configuring.html

The purpose of the Switch Microservice of Policy Enforcer is to isolate infected hosts. The Switch Microservice is a component of Policy Enforcer that runs on EX Series and QFX Series switches. It communicates with Policy Enforcer and Juniper ATP Cloud to receive threat intelligence and quarantine commands. When an infected host is detected by Juniper ATP Cloud, Policy Enforcer sends a command to the Switch Microservice to isolate the host by applying an access control list (ACL) on the switch port where the host is connected. The ACL blocks all traffic from or to the host except for the traffic that is required for remediation. The Switch Microservice also tracks the MAC address of the infected host and updates Policy Enforcer if the host moves to a different switch port or a different switch. This way, the Switch Microservice ensures that the infected host is isolated until it is remediated and no longer poses a threat to the network. Reference: Juniper Security, Professional (JNCIP-SEC) Reference Materials source and documents:

https://www.juniper.net/documentation/en_US/junos/topics/concept/security-policy-enforcerswitch-microservice-overview.html

According to the Juniper documentation, Juniper ATP Cloud supports the following modes:

Layer 3 mode: In this mode, the SRX Series device acts as a Layer 3 gateway and routes traffic between different subnets. The SRX Series device performs NAT and security policy enforcement on the traffic and sends a copy of the traffic to Juniper ATP Cloud for analysis. This mode is suitable for networks that have multiple subnets and require NAT and firewall functions1

Transparent mode: In this mode, the SRX Series device acts as a Layer 2 bridge and forwards traffic between the same subnet. The SRX Series device does not perform NAT or security policy enforcement on the traffic, but sends a copy of the traffic to Juniper ATP Cloud for analysis. This mode is suitable for networks that have a single subnet and do not require NAT or firewall functions1 The other two modes, global mode and private mode, are not supported by Juniper ATP Cloud.

Global mode is a configuration option for Juniper ATP Appliance, which is an on-premises solution that provides threat detection and prevention. Private mode is a configuration option for Juniper ATP Private Cloud, which is a cloud-based solution that provides threat detection and prevention within a private network23 Reference:

1: Juniper Advanced Threat Prevention Cloud | ATP Cloud | Juniper Networks 2: Juniper Advanced Threat Prevention Appliance | ATP Appliance | Juniper Networks 3: [Juniper Advanced Threat Prevention Private Cloud | ATP Private Cloud | Juniper Networks]