Juniper JN0-335 - Security, Specialist (JNCIS-SEC)

 The error occurred because the “http” application is not defined in this context of Juniper SRX Series device configuration. One solution is to create a custom application named “http” at the [edit applications] hierarchy level (Option C). Another solution is to modify the security policy to use the built-in “junos-http” application which is predefined and doesn’t need an explicit definition (Option D). Options A and B are not correct because they do not address the root cause of the error, which is the undefined application “http”. References: The answers can be verified from Juniper’s official documentation on security policies and applications available on their website. Here are some relevant links:

Security Policies Feature Guide for Security Devices

Understanding Applications and Application Sets for SRX Series Devices

Configuring Custom Applications for SRX Series Devices

Predefined Applications for SRX Series Devices

The Junos IPS feature is a security service that is integrated on SRX Series devices, which are high-performance network security platforms that offer firewall, VPN, IPS, application security, and unified threat management capabilities. The Junos IPS feature uses various methods to detect and prevent intrusions, such as signature-based detection, protocol anomaly detection, behavioral anomaly detection, and custom signatures. Signature-based detection compares network traffic against predefined patterns of known attacks and blocks traffic when a match is found. Protocol anomaly detection monitors network traffic for deviations from the expected or normal behavior of common protocols, such as HTTP, FTP, SMTP, and DNS, and blocks traffic when an anomaly is detected. Behavioral anomaly detection monitors network traffic forchanges in the baseline behavior of hosts, networks, or applications, and blocks traffic when a significant deviation is detected. Custom signatures allow administrators to create their own patterns of attacks based on specific criteria, such as IP addresses, ports, protocols, or payload content, and block traffic when a match is found. The Junos IPS feature does not use sandboxing to detect unknown attacks, as this is a function of the Juniper ATP Cloud service, which is a cloud-based service that provides advanced malware detection and prevention for the network. The Junos IPS feature is not a standalone platform, but rather a service that runs on SRX Series devices, which can be deployed as physical or virtual appliances. References:

[Juniper Security, Professional (JNCIP-SEC) Reference Materials] 1

[Juniper Security, Specialist (JNCIS-SEC) Reference Materials] 2

[Junos OS Security Configuration Guide] 3

[Junos OS Security Feature Guide] 4

[Junos OS Security Feature Support Reference] 5

Static attack object groups are predefined groups of attack objects that are included in Juniper’s IPS signature database. These groups do not change automatically when Juniper updates the database. You must manually add matching attack objects to a custom group34 References:

Attack Objects and Object Groups for IDP Policies | Junos OS

Attack Objects and Object Groups for IDP Policies on NFX Devices

Exam Name: Security, Specialist (JNCIS-SEC) Version: DEMO - Lead2Pass

Juniper - ExamsBoost

Based on the exhibit, Nancy logged in to the juniper.net Active Directory domain, as shown by the domain name in the user identity information. The IP address of the authenticating domain controller is 172.25.11.140, as shown by the domain controller address in the user identity information. The IP address of Nancy’s client PC is not 172.25.11, but 172.25.11.11, as shown by the source IP address in the user identity information. Nancy is not a member of the Active Directory sales group, but of the marketing group, as shown by the group name in the user identity information34 References:

active-directory-access | Junos OS | Juniper Networks

13. Juniper SRX Active Directory Integration - RAYKA

Configure Juniper Identity Management Service to Obtain User Identity …

Create an Active Directory Profile | SD Cloud | Juniper Networks

 JIMS domain PC probes are a mechanism to obtain username to IP address mapping information from devices in a customer’s domain. JIMS initiates a domain PC probe when it receives a request from an SRX Series device for a username to IP address mapping that is not found in the domain security event log. JIMS uses the administrative credentials configured for PC probes to access the device and query the Windows Management Instrumentation (WMI) service for the username to IP address mapping12 References:

1: Juniper Identity Management Service Feature Guide - TechLibrary - Juniper Networks

2: Juniper Identity Management Service (JIMS) Documentation - Juniper Networks

Juniper ATP Cloud is the threat intelligence hub for Juniper customers, identifying indicators of compromise for users and devices across the network. It provides security intelligence feeds, such as command and control (C&C) and infected hosts, that can be used to block or log malicious traffic. When you configure the C&C category with Juniper ATP Cloud, you need to specify the authentication token, the URL, and the update interval for the feeds. After you commit the configuration, the feeds are downloaded automatically from the Juniper ATP Cloud server. This may take a few minutes, depending on the network latency and the size of the feeds. Therefore, no action is required from the user, and the feeds will have non-zero objects once the download is complete. You can verify the status of the feeds by using the show services security intelligence category summary command, as shown in the exhibit. References:

Introduction to Juniper ATP Cloud

security-intelligence (services)

Juniper ATP Cloud CLI Reference Guide

vSRX is a virtual firewall that runs on various hypervisors, such as VMware ESXi, Microsoft Hyper-V, and KVM. vSRX provides security and networking services at the perimeter or edge of virtualized environments. vSRX supports different versions of VMware ESXi, Hyper-V, and KVM, depending on the Junos OS release and the vSRXflavor. Citrix Hypervisor and Oracle VM are not supported hypervisors for vSRX. References:

vSRX Overview

Understand vSRX with Microsoft Hyper-V

Requirements for vSRX Virtual Firewall on VMware

vSRX Deployment Guide for Microsoft Hyper-V

vSRX Chassis Cluster/High Availability support for vSRX

A: In the vSwitch security settings, accept promiscuous mode. This is a true statement. Promiscuous mode allows the vSwitch to forward all frames to the vSRX control interface, regardless of the destination MAC address1. This is necessary for the control link to function properly and exchange heartbeat messages between the cluster nodes2.

C: In the vSwitch security settings, reject forged transmits. This is also a true statement. Forged transmits are frames that have a source MAC address that is different from the one that is assigned to the vNIC by the host operating system1. Rejecting forged transmits prevents spoofing attacks and ensures that the control link traffic is authentic2.

B: In the vSwitch properties settings, set the VLAN ID to None. This is a false statement. The VLAN ID for the vSwitch can be any value as long as it matches the VLAN ID for the vSRX control interface1. The VLAN ID is used to tag the control link traffic and separate it from other traffic on the same vSwitch2.

D: In the vSwitch security settings, reject MAC address changes. This is also a false statement. MAC address changes are allowed for the vSRX control interface, as the vSRX uses the MAC address of the control link to identify the cluster nodes1. Rejecting MAC address changes would prevent the cluster formation and synchronization2.

References:

1: vSRX Virtual Firewall Cluster Staging and Provisioning for VMware

2: Configuring Chassis Clustering on SRX Series Devices