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Palo Alto Networks Network Security Analyst Sample Questions:

1. A security analyst is investigating a suspicious outbound connection from an IoT smart light bulb, which normally only communicates with its cloud controller. The firewall logs show traffic initiated from the light bulb's IP address (192.168.5.10) to an external IP (203.0.113.5) on TCP port 4444. The existing IoT security profile for the 'Smart-Home-IoT' device group, to which the light bulb belongs, is configured to allow only HTTPS traffic to 'iot.vendorcloud.com'. Which of the following is the MOST likely reason for this connection being allowed, assuming no explicit 'deny all' rule is present for the IoT zone after the allowed traffic?

A) The 'Threat Prevention' profile applied to the rule is not configured to block outbound connections.
B) The firewall's 'Application Identification' engine incorrectly identified the traffic as HTTPS.
C) The 'Smart-Home-IoT' device group's IoT Security Profile has a 'Service' object defined for 'any' rather than 'application-default'.
D) The security rule permitting HTTPS to 'iot.vendorcloud.com' has a broader 'Service' definition, or there is another rule higher in the rulebase that permits 'any' service for IoT devices.
E) The IoT device has bypassed the firewall by using a VPN tunnel.

2. A network administrator is troubleshooting an intermittent application connectivity issue that only affects a specific subnet, but only when traffic traverses a particular firewall managed by Panoram a. The administrator suspects a recent policy change. How can Panorama's features be leveraged to efficiently diagnose and potentially revert problematic policy changes for this specific firewall, minimizing impact to other devices?

A) Utilize Panorama's 'Configuration History' and 'Load Named Configuration' features to review recent changes, identify the specific commit that introduced the issue, and revert only that firewall's configuration to a previous, known-good state without affecting other devices managed by Panorama.
B) Use the 'Commit Scope' feature in Panorama to commit only the changes made to the problematic device group and then review the commit history on the device itself.
C) Perform a 'Revert to Last Saved Configuration' directly on the affected firewall, then manually re-apply all necessary changes.
D) Export the full configuration of all firewalls, use a diff tool to compare them, then manually reconfigure the problematic firewall.
E) Disable all security policies on the problematic firewall to isolate the issue, then re-enable them one by one.

3. A Network Security Analyst is tasked with auditing a Panorama configuration. They need to identify all security policies that utilize a specific custom application signature, regardless of which Device Group or virtual system (vsys) they reside in. Which Panorama feature and command set would be most efficient for this task?

A) Run a CLI command on Panorama:
B) Utilize a third-party network configuration management tool to pull configurations from Panorama and search.
C) Use the 'Object Explorer' in Panorama to search for the custom application signature, then right-click and select 'Show Usage'.
D) Navigate to the 'Policies' tab, then manually browse through each Device Group's security policies and review the application column.
E) Export the entire Panorama configuration as XML and perform a text search for the custom application signature.

4. An organization is deploying a new application that uses a custom TCP-based protocol over a non-standard port (e.g., TCP/8000). Despite creating a custom application signature, defining a service object for TCP/8000, and allowing it in a security policy, the application fails to establish connections. Packet captures on the client side show SYN packets being sent, but no SYN-ACKs are received. Debugging on the Palo Alto Networks firewall (debug flow basic and debug flow session) indicates the initial SYN packet is received by the firewall and matched to the correct security policy, but no session is established or forwarded. The firewall is in virtual wire mode between two internal segments. What advanced, context-specific misconfiguration or state is the most likely culprit?

A) The firewall is performing IP-address-based session-stickiness or asymmetric routing is occurring for the specific port/protocol, causing return traffic to be sent out a different interface or to be dropped.
B) The custom application signature is incorrectly defined, causing the App-ID engine to delay classification indefinitely, leading to a session timeout before forwarding.
C) The TCP 'Deny-Unknown' setting in the Zone Protection profile for the ingress or egress zone is silently dropping traffic for unknown applications or applications on non-standard ports before App-ID can fully classify them, even if a custom signature exists.
D) The custom application signature's timeout value is too aggressive for the application's initial handshake, leading to session teardown before completion.
E) The security policy allows the service (TCP/8000), but the 'application' field is set to 'any', and the firewall's default application-to-port mapping for 'any' application is blocking TCP/8000.

5. A large enterprise uses a Palo Alto Networks firewall in an active/passive HA pair. They need to implement a data loss prevention (DLP) solution for outbound traffic, specifically to prevent sensitive intellectual property (IP) from leaving the network via email (SMTP, SMTPS) or file transfers (FTP, SMB). The IP is defined by a set of keywords and regular expressions. Additionally, they must ensure that this DLP inspection does not significantly degrade performance for high-volume, non-sensitive traffic. How would you configure Data Filtering profiles and apply them, considering performance and security?

A) Create a Data Filtering profile for each sensitive IP type. Configure a custom data pattern (e.g., 'ProjectX-code', 'CustomerDB-records'). Set the action to 'block' for high severity. Create security policy rules specifically for SMTP/SMTPS, FTP, and SMB applications destined for the untrust zone. Attach a Security Profile Group containing only the Data Filtering profile to these specific rules.
B) Utilize a common Security Profile Group with Antivirus, Anti-Spyware, and Vulnerability Protection for all outbound traffic. Then, create a separate Security Profile Group containing the Data Filtering profile for sensitive IP. Apply this Data Filtering-specific group to a separate 'DLP security policy rule, ensuring it's evaluated before the general outbound rules.
C) Create a single Data Filtering profile. Define multiple data patterns (keywords, regex) for the IR Set the action for all patterns to 'block'. Apply this Data Filtering profile to a Security Profile Group, which is then attached to all outbound security policy rules. This ensures full coverage.
D) Define a Data Filtering profile with sensitive data patterns. Set the action to 'block' and enable 'log at session start' and 'log at session end'. Apply this profile to a Security Profile Group. Create a security policy rule for each relevant application (SMTP, SMTPS, FTP, SMB) with source as 'internal zones' and destination as 'untrust zone', applying the Security Profile Group to these rules. Ensure the 'any' application is not used.
E) Configure a Data Filtering profile with sensitive patterns and 'block' action. Implement PBF to divert all outbound SMTP, SMTPS, FTP, and SMB traffic to a dedicated Vwire interface. On this Vwire, apply a Security Profile Group that includes the Data Filtering profile and other relevant threat prevention. Other traffic bypasses this path.

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