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Palo Alto Networks Network Security Analyst Sample Questions:

1. An organization relies heavily on cloud-based Software as a Service (SaaS) applications. They need to implement a security policy that allows access to approved SaaS applications (e.g., Office 365, Box) but strictly blocks all other SaaS applications, and also prevents any shadow IT usage. Furthermore, for approved SaaS applications, the organization wants to apply specific content inspection profiles for data loss prevention and malware prevention. Which combination of Security Policy rules and features would be the most robust and maintainable?

A) Rule 1 (Allow): Source: Internal, Destination: Untrust, Application: office365-base, box-base, Service: application-default, Action: allow, Profiles: Data Filtering, Antivirus. Rule 2 (Deny): Source: Internal, Destination: Untrust, Application: any, Service: any, Action: deny.
B) Rule 1 (Allow): Source: Internal, Destination: Untrust, Application Group: 'Approved_SaaS_Applications' (with App-IDs for Office 365, Box etc.), Service: application-default, Action: allow, Profiles: Data Filtering, Antivirus, WildFire, Spyware. Rule 2 (Deny): Source: Internal, Destination: Untrust, Application Group: 'Unknown_SaaS_Applications' (using App-ID filters), Service: application-default, Action: deny. Rule 3 (Final Deny): Source: Internal, Destination: Untrust, Application: any, Service: any, Action: deny.
C) Rule 1 (Allow): Source: Internal, Destination: Untrust, Application Filter: 'SaaS', Action: allow, Profiles: Data Filtering, Antivirus. Rule 2 (Deny): Source: Internal, Destination: Untrust, Application: any, Action: deny.
D) Rule 1 (Allow): Source: Internal, Destination: Untrust, Application: office365-base, box-base, Service: tcp/443, Action: allow, Profiles: URL Filtering (allow approved SaaS URLs). Rule 2 (Deny): Source: Internal, Destination: Untrust, Application: any, Service: tcp/443, Action: deny.
E) Rule 1 (Allow): Source: Internal, Destination: Untrust, Application Filter: 'Approved_SaaS_Apps' (custom filter group), Service: application-default, Action: allow, Profiles: Data Filtering, Antivirus, Vulnerability Protection, URL Filtering (block unknown/unrated). Rule 2 (Deny): Source: Internal, Destination: Untrust, Application: any, Service: application-default, Action: deny.

2. A sophisticated zero-day attack is suspected to be propagating laterally within your network. You need to quickly identify all active network connections, their associated applications, users, and any related threats, across your distributed environment. Then, you need to rapidly quarantine affected hosts and block the identified malicious application signature. Which set of tools and features provides the most efficient and comprehensive response?

A) 1. Review firewall logs for 'deny' entries. 2. Use Wireshark on affected hosts for packet capture. 3. Manually update security policies on each firewall.
B) 1. Command Center: 'Threat Activity' and 'Network Activity' dashboards for real-time anomalous traffic. 2. Use dynamic filters in Command Center to pinpoint source/destination IPs, users, and applications. 3. Implement External Dynamic Lists (EDLs) or a custom Anti-Spyware profile for rapid IPIURL blocking. 4. Create Security Policy rules to quarantine infected hosts (e.g., move to a quarantine zone or block all traffic).
C) 1. Activity Insights: Generate 'User Activity' reports for suspicious logins. 2. Policy Optimizer: Recommend rules to block specific user activity. 3. Manually block user accounts.
D) 1. Command Center: Focus on 'Application Usage' dashboard to detect new applications. 2. Manually configure a URL filtering profile to block suspicious websites. 3. Isolate the network segment.
E) 1. Command Center: 'Network Activity' dashboard filtered for high session count. 2. Activity Insights: Review 'Top Applications' for anomalies. 3. Policy Optimizer: Create a new 'Deny' rule for the suspicious application.

3. A Security Administrator is implementing a new policy on a Palo Alto Networks firewall. The requirement is to allow specific internal users access to Salesforce, but only for the 'Sales Cloud' application, and block all other Salesforce functionalities. The organization also wants to enforce strict file transfer restrictions within this allowed Salesforce access. Which combination of Security Policy elements and profiles would be most effective and precise in achieving this goal?

A) Source Zone: Trust, Source User: sales_team_group, Destination Zone: Untrust, Application: salesforce-base, Service: application-default, Actions: allow, Profile: File Blocking Profile (block all files).
B) Source Zone: Trust, Source User: sales_team_group, Destination Zone: Untrust, Application: any, Service: application-default, Actions: allow, Profile: URL Filtering Profile (allow salesforce.com), File Blocking Profile (block all files).
C) Source Zone: Trust, Source User: any, Destination Zone: Untrust, Application: salesforce-base, Service: tcp/443, Actions: allow, Profile: Data Filtering Profile (block sensitive data).
D) Source Zone: Trust, Source IJser: sales_team_group, Destination Zone: Untrust, Application: salesforce-salescloud, Service: application-default, Actions: allow, Profile: File Blocking Profile (block executable & archives), WildFire Analysis Profile.
E) Source Zone: Trust, Source User: sales_team_group, Destination Zone: Untrust, Application: salesforce-salescloud, Service: application-default, Actions: allow, Profile: File Blocking Profile (block executable & archives), Data Filtering Profile (block PII), Antivirus Profile, Vulnerability Protection Profile.

4. An organization uses a Palo Alto Networks firewall and requires highly specific logging and alerting for anomalous DNS queries. They want to generate a custom log entry whenever a DNS query for a domain matches a specific regex pattern 'A(?!. (?:googlelmicrosoftlamazon)\.com$). AND the query originates from a client within their 'Guest_Network' zone. Furthermore, the log entry should include the matched domain and the client's IP address. Which custom log configuration using a Data Pattern and custom Log Profile would achieve this requirement while minimizing performance impact?

A)

B)

C)

D)

E)

5. Consider a highly secure environment where outbound DNS traffic must be rigorously inspected for DNS exfiltration attempts and malicious domain lookups. The security team wants to leverage Palo Alto Networks' DNS Security profiles. They have identified several internal DNS servers (e.g., 10.0.0.10) that are authorized for external lookups, while all other internal hosts should only resolve against these internal servers. Malicious DNS requests should trigger an immediate block and log. How would you configure a DNS Security profile and related objects to achieve this, including handling specific known bad domains and unknown domains effectively?

A) Create a DNS Security profile with 'Domains' set to 'block' for all threat categories (e.g., malware, phishing, command-and-control, known-bad-domains, unknown)- Enable 'DNS. Sinkhole' and configure a dedicated sinkhole IP Apply this DNS Security profile to all outbound security policies that allow DNS traffic. For the internal DNS servers (10.0.0.10), create an explicit security policy allowing their DNS traffic to external destinations without this DNS Security profile, ensuring it's evaluated first.
B) Create a DNS Security profile. Set 'Domains: Malware' and 'Domains: Phishing' to 'block'. Enable 'DNS Tunneling' detection and set the action to 'block'- Configure a DNS Sinkhole IP Apply this DNS Security profile to a security policy rule that permits DNS traffic from internal hosts to the internal DNS servers (10.0.0.10). For traffic from 10.0.0.10 to external, apply a separate DNS Security profile with 'allow' for all categories.
C) Create a DNS Security profile. Configure 'Domains' to 'block' for 'malware', 'phishing', and 'unknown'. Set 'Sinkhole' to the firewall's management IP Apply this profile to all outbound security policies matching DNS traffic (port 53 UDP/TCP) regardless of source.
D) Create a DNS Security profile. For 'DNS Query Actions', set 'Domains: Malware' to 'block', 'Domains: Phishing' to 'block'. For 'DNS Tunneling', set 'tunnel-ratio' to 'block'. Configure a custom DNS Sinkhole IP (e.g., 10.0.0.1). Create two security policies: one allowing DNS from internal DNS servers (10.0.0.10) to external with this DNS Security profile, and another blocking DNS from 'any' internal host directly to external DNS.
E) Create a DNS Security profile with 'Domains' set to 'block' for 'command-and-control', 'malware', and 'phishing'. Configure a custom DNS Sinkhole IP Apply this profile only to security policies where the source is 'any' and destination is 'external-DNS'. Create a separate policy to allow DNS from internal DNS servers to external DNS with no DNS Security profile.

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