Get JN0-335 Dumps : Verified Security, Specialist (JNCIS-SEC)

SSL proxy is a feature that allows SRX Series devices to act as an intermediary between the client and the server for SSL/TLS encrypted traffic. SRX Series devices support two types of SSL proxy: SSL forward proxy and SSL reverse proxy. SSL forward proxy is also known as web proxy or client-protection, and SSL reverse proxy is also known as server-protection1.

SSL forward proxy enables the SRX Series device to decrypt the client-side traffic and apply security policies before re-encrypting and forwarding it to the server. This allows the SRX Series device to inspect the application data and identify the applications and threats in the encrypted traffic2.

SSL reverse proxy enables the SRX Series device to decrypt the server-side traffic and apply security policies before re-encrypting and forwarding it to the client. This allows the SRX Series device to protect the server from malicious clients and provide load balancing and high availability for the server3.

References:

• Configuring SSL Proxy
• SSL Forward Proxy Overview
• SSL Reverse Proxy Overview

AppFW and APPID are two application security features that can be used to block malicious applications regardless of the port number being used. AppFW provides policy-based enforcement and control on traffic based on application signatures. By using AppFW, you can block any application traffic not sanctioned by the enterprise. APPID identifies applications based on their behavior and characteristics, regardless of port, protocol, or encryption method. By using APPID, you can classify applications and apply appropriate security policies to them123 References:

• AppSecure: Application Visibility and Control Solution Brief
• Application Firewall | Junos OS | Juniper Networks
• Security Policy Applications and Application Sets | Junos OS | Juniper Networks

https://www.juniper.net/documentation/us/en/software/junos/security-iot/topics/topic-map/security-iot-overview.html SRX does not identify the iot device. It streams the metadata to Juniper ATP cloud and Junipe ATP cloud identifies the device.

 This is because the error message indicates that the client device does not trust the certificate authority that issued the certificate for the external server. Therefore, you need to import the root CA certificate from the SRX Series device to the client device and add it to the trusted certificate store. This will allow the client device to verify the identity of the SRX Series device and accept the certificates it generates for the external servers3.

The other options are not correct because:

• A. Load a known good, but expired. CA certificate onto the SRX Series device. This will not solve the problem because the client device will still reject the certificates from the SRX Series device if they are signed by an expired CA certificate. The expiration date of the CA certificate is one of the factors that the client device checks when validating the certificate2.
• B. Install a new SRX Series device to act as the client proxy. This will not solve the problem because the new SRX Series device will still need to have a root CA certificate configured and imported to the client devices. The problem is not with the SRX Series device itself, but with the trust relationship between the SRX Series device and the client devices2.
• C. Reboot the SRX Series device. This will not solve the problem because rebooting the SRX Series device will not change the configuration or the certificates on the SRX Series device or the client devices. The problem is not caused by a temporary glitch or a malfunction, but by a mismatch between the certificates on the SRX Series device and the client devices2.

I hope this helps you understand the problem and the solution better. If you want to learn more about SSL client protection proxy, you can check out the following references:

• SSL Proxy Overview
• Configuring SSL Forward Proxy
• Configuring a Root CA Certificate
• SSL Proxy - Client Protection

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