JN0-335 VCE Exam Download

 vSRX is a virtual firewall that runs on various cloud platforms, including AWS and OpenStack. AWS is a cloud service provider that offers infrastructure as a service (IaaS) solutions, such as compute, storage, and networking resources. OpenStack is an open source software platform that enables cloud orchestration, which is the automated management of cloud resources and services. vSRX supports both AWS and OpenStack as deployment options, and integrates with their features and tools. For example, vSRX can use cloud-init to automate the initialization of vSRX instances in AWS and OpenStack environments. vSRX can also leverage the security groups and elastic IP addresses of AWS, and the network and security services of OpenStack. References:

• vSRX Deployment Guide for AWS
• vSRX Virtual Firewall
• Use Cloud-Init in an OpenStack Environment to Automate the Initialization of vSRX Instances

References:

• 2: Junos OS Security Configuration Guide | Understanding Security Policies

The commands in the exhibit show how to configure a firewall filter on the loopback interface (lo0) of an SRX Series device. The loopback interface is a gateway for all the control traffic that enters the Routing Engine of the device. The firewall filter can be used to monitor and protect this control traffic from various attacks. Two statements that are true based on the exhibit are:

• The loopback interface blocks invalid traffic on its entry into the device: The firewall filter applied on lo0 has a term that matches any packet with an invalid source address (such as 0.0.0.0/8 or 127.0.0.0/8) and discards it. This prevents spoofing or DoS attacks using invalid source addresses.
• The device manager can access the device from 10.253.1.2: The firewall filter applied on lo0 has a term that matches any packet with a source address of 10.253.1.2 and accepts it. This allows the device manager to access the device from this IP address using protocols such as SSH, Telnet, HTTP, or HTTPS.

References := Firewall Filter Support on Loopback Interface, [MX/SRX] The behavior of firewall filters that are applied on the loopback interfaces in virtual routers

• B: Chassis cluster member devices synchronize configuration using the control link. The control link is used to exchange control messages and configuration information between the two nodes of a chassis cluster1. The primary node pushes the configuration to the secondary node and ensures that both nodes have the same configuration2.
• C: A control link failure causes the secondary cluster node to be disabled. If the control link fails, the primary node cannot communicate with the secondary node and assumes that the secondary node is down1. The primary node then disables the secondary node and takes over all the traffic processing2.
• E: Heartbeat messages verify that the chassis cluster control link is working. The control link also carries heartbeat messages that are exchanged between the two nodes every 500 milliseconds by default1. The heartbeat messages indicate the status and health of the nodes and the control link2.
• A: Chassis cluster control links must be configured using RFC 1918 IP addresses. This is a false statement. The control link can use any IP address range as long as it is not in conflict with other interfaces or routes on the cluster nodes1. RFC 1918 IP addresses are private addresses that are not routable on the Internet4.
• D: Recovery from a control link failure requires that the secondary member device be rebooted. This is also a false statement. Recovery from a control link failure does not require rebooting the secondary node1. The secondary node can rejoin the cluster when the control link is restored and the configuration is synchronized2.

References:

• 1: Configuring Chassis Clustering on SRX Series Devices
• 2: Chassis Cluster User Guide for SRX Series Devices
• 3: Connecting SRX Series Firewalls to Create a Chassis Cluster
• 4: RFC 1918 - Address Allocation for Private Internets

https://supportportal.juniper.net/s/article/SRX-Secondary-node-of-a-Chassis-Cluster-is-in-Disabled-state-how-do-you-find-the-cause