Palo Alto Networks NetSec-Analyst

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Palo Alto Networks Network Security Analyst Sample Questions:

1. An energy utility is employing Palo Alto Networks NGFWs to secure its distribution grid, which relies heavily on DNP3 and IEC 61850 protocols for substation automation. The security team wants to apply an 'IoT Security Profile' that provides robust protection against common industrial protocol vulnerabilities and ensures protocol conformity. Specifically, they need to:
1. Enforce strict DNP3/IEC 61850 protocol compliance, flagging any malformed packets or out-of-spec commands.
2. Prevent unauthorized 'firmware update' commands on IEC 61850 devices.
3. Detect and block known exploits targeting DNP3 and IEC 61850.
Which combination of features within an 'IoT Security Profile' and associated policy would address all these requirements effectively? (Multiple Response)

A) Implement 'Application Function Filtering' for IEC 61850 within the IoT Security Profile, specifically denying the 'firmware-update' function code or equivalent.
B) Apply a 'Data Filtering' profile to prevent specific binary patterns associated with firmware updates from traversing the network.
C) Configure a 'Vulnerability Protection' profile with a focus on 'Critical' and 'High' severity signatures related to SCADA/ICS and apply it to the security policies governing DNP3/IEC 61850 traffic.
D) Set up a custom 'URL Filtering' profile to block access to known malicious update servers.
E) Utilize 'Protocol Anomaly Detection' within the IoT Security Profile for DNP3 and IEC 61850 to detect malformed packets and non-compliant commands.

2. A cloud security architect is integrating a Palo Alto Networks firewall with a custom-developed SRE (Site Reliability Engineering) platform. The platform needs to dynamically adjust DoS protection profiles based on real-time application performance metrics and observed attack patterns. Specifically, when the platform detects a significant increase in application latency coupled with a surge in unknown TCP connections, it should programmatically enable and fine-tune a specific DoS protection profile. Consider the following Python code snippet using the pan -os -python library:

Which of the following code additions would correctly complete the 'Missing code for adding TCP Flood thresholds' section within the DoSProtectionProfile object, ensuring it configures a TCP SYN flood protection with 'activation-rate' from 'threshold rate' and 'action: syn-cookie', and integrates with the overall dynamic deployment logic?

A)

B) The
C)

D)

E)

3. A security analyst is investigating a persistent issue where an internal server, running a custom application over a non-standard TCP port (e.g., TCP 12345), cannot establish outbound connections to an external cloud service. The Palo Alto Networks firewall is configured with a security policy allowing this traffic with 'Application: any' and 'Service: application-default'. Packet captures show the initial SYN from the server, but no response from the cloud service. The firewall's traffic logs for this session show 'deny' with 'reason: untrusted' and 'action: drop'. What is the most plausible and complex reason for this behavior, indicating a deep understanding of App-ID and security profiles?

A) The firewall's decryption profile is misconfigured for the outbound traffic, causing the 'untrusted' verdict.
B) The 'Service: application-default' setting is problematic because App-ID requires initial packets to establish a known application before allowing traffic, and for this non-standard port, it's failing classification or hitting a default security profile action.
C) A custom threat signature is misfiring on the initial SYN packet, classifying it as malicious before App-ID can properly identify the application.
D) The security policy rule for the internal server's outbound traffic is incorrectly placed after a default deny rule.
E) The external cloud service's IP address is mistakenly included in a custom URL category or External Dynamic List that is blocked by another policy.

4. An enterprise is facing a unique challenge with its SD-WAN deployment. They have a custom, latency-critical, stateful application (App-ID: proprietary-app) that requires all its traffic (initial connection and subsequent data) to be pinned to a single, consistent WAN path for the entire session duration to avoid session resets. This application must prefer a specific MPLS link (Link A) if its latency is below 30ms and packet loss is below 0.01 If Link A degrades, the application should failover to a dedicated Internet VPN tunnel (Tunnel B) if Tunnel B's latency is below 50ms and packet loss below 0.1%. If both links fail their respective SLAs, the traffic should be dropped. Furthermore, if a session is established on Tunnel B, it should not flap back to Link A even if Link A recovers, to maintain session consistency. Which configuration elements are crucial to implement this requirement?

A) 1. Define two SLA profiles: 'MPLS_SLA' (30ms lat, 0.01% loss) and 'Internet_SLX (50ms lat, 0.1% loss). 2. Create an SD-WAN policy for 'proprietary-app'. Configure 'Dynamic Path Selection' with 'Best Path' and the following order: LinkA (using 'MPLS SLA'), then Tunnel B (using 'Internet_SLA'). 3. Crucially, enable 'Session Stickiness' within the SD-WAN policy settings for this application to prevent flap-back.
B) 1. Use a PBF rule for 'proprietary-app' to force it to LinkA as the primary interface. 2. Configure a monitor on Link A's health. If LinkA fails, automatically disable its interface. 3. Rely on routing to then pick Tunnel B as the next best path. 4. Implement a custom script to manually re-enable Link A only after a prolonged period of stability to prevent flapping.
C) 1. Create an SLA profile for 'proprietary-app' with latency (30ms) and packet loss (0.01 thresholds. Apply this SLA to Link 2. Configure a PBF rule for 'proprietary-app' with primary next-hop Link A and secondary next-hop Tunnel B. Enable 'Session Stickiness' on the PBF rule. 3. Configure a separate SLA profile for Tunnel B (latency 50ms, packet loss 0.1 %) and link it to the PBF secondary path.
D) 1. Configure Link A as the primary egress interface in a Zone. Configure Tunnel B as a backup interface in the same Zone. 2. Implement an SD-WAN policy for 'proprietary-app' that uses this Zone. 3. Use BFD on both Link A and Tunnel B to detect link failures. 4. Manually configure session persistence on the firewall for proprietary-app' to keep sessions on the initial path.
E) 1. Create a primary SD-WAN Path Group for Link A with a 30ms latency / 0.01% packet loss SLA. 2. Create a secondary SD-WAN Path Group for Tunnel B with a 50ms latency / 0.1% packet loss SLA. 3. Apply an SD-WAN policy for 'proprietary-app' that uses these path groups in order. 4. Enable 'Failover Only' mode for the secondary Path Group, which ensures once traffic moves to Tunnel B, it stays there until Tunnel B itself fails its SLA.

5. A financial institution utilizes custom-built applications that transmit highly sensitive data over non-standard ports (e.g., TCP 10000, 10001 They need to apply the full suite of security profiles (Antivirus, Anti-Spyware, Vulnerability Protection, URL Filtering, File Blocking, Data Filtering) to this traffic. However, Palo Alto Networks' App-ID initially classifies this traffic as 'unknown-tcp'. What is the most appropriate and secure method to ensure these security profiles are applied correctly?

A) Apply the security profiles to the 'Default Security Policy' rule, as it catches all 'unknown-tcp' traffic by default.
B) Create an 'Application Override' rule for TCP ports 10000 and 10001 , setting the overridden application to 'web-browsing'. Then, apply the security profiles to the policy allowing 'web-browsing'.
C) Create a 'Service' object for ports 10000 and 10001. In the Security Policy, use this service object, set the application to 'unknown-tcp', and apply the security profiles.
D) Configure a Security Policy rule for the specific source/destination/port, and set the application to 'any'. Apply the profile group to this rule.
E) Develop a 'Custom Application' signature for the internal applications based on their unique traffic characteristics (e.g., specific HTTP headers, protocol patterns, or SSL certificate details). Once recognized, use this custom application in the Security Policy and apply the desired security profiles.

Solutions: