JN0-636 - Security Professional (JNCIP-SEC)

According to the Juniper documentation, the steps to detect domain generation algorithms (DGA) on an SRX Series firewall are as follows:

• Define a security-metadata-streaming policy under [edit services]. A security-metadata-streaming policy is a configuration that enables the SRX Series firewall to collect and stream security metadata, such as DNS queries and responses, to Juniper ATP Cloud for analysis. Juniper ATP Cloud uses machine learning models and known pre-computed DGA domain names to provide domain verdicts, which helps in-line blocking and sinkholing of DNS queries on SRX Series firewalls1. You can define a security-metadata-streaming policy by using the following command:

set services security-metadata-streaming policy

• Attach the security-metadata-streaming policy to a security zone. A security zone is a logical grouping of interfaces that have similar security requirements. You can attach the security-metadata-streaming policy to a security zone by using the following command:

set security zones security-zone services security-metadata-streaming policy

The following steps are not required or incorrect:

• Define an advanced-anti-malware policy under [edit services]. An advanced-anti-malware policy is a configuration that enables the SRX Series firewall to scan files for malware using Juniper ATP Cloud. It is not related to DGA detection2.
• Attach the advanced-anti-malware policy to a security policy. A security policy is a configuration that defines the rules for permitting or denying traffic between security zones. It is not related to DGA detection3.

References: 1: Configuring Security Metadata Streaming 2: Configuring Advanced Anti-Malware Policies 3: Configuring Security Policies

NAT (Network Address Translation) is a method to map one IP address space into another by modifying network address information in the IP header of packets while they are in transit across a traffic routing device. There are different types of NAT, one of them is the persistent NAT which is a type of NAT that allows you to map the same internal IP address to the same external IP address each time a host initiates a connection.

This is the port used for encrypted communication between the SRX series device and the Juniper ATP Appliance

In order to enroll an SRX Series device with Juniper ATP Appliance, the firewall device must have port 443 open. Port 443 is the default port used for HTTPS traffic, the communication between the SRX Series device and the ATP Appliance needs to be encrypted, that's why this port should be opened.