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NGFW-Engineer · domain

troubleshooting

Practise Certified Next-Generation Firewall Engineer (NGFW-Engineer) troubleshooting practice questions — original exam-style scenarios with answer choices, explanations, and analysis of common mistakes.

247 questions60 easy112 medium75 hard

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What this domain covers

What to know about troubleshooting

troubleshooting questions test whether you can apply the concept in context, not just recognise a definition.

How the topic appears in realistic exam-style scenarios.

Which detail in the question changes the correct answer.

How to eliminate plausible but wrong options.

How to connect the question back to the wider exam objective.

Watch out for

Common troubleshooting exam traps

  • ▸Answering from memory before reading the full scenario.
  • ▸Missing a constraint such as cost, availability, security, scope or command context.
  • ▸Choosing a broad answer when the question asks for the most specific fix.
  • ▸Ignoring why the wrong options are tempting.

Question index

All troubleshooting questions (247)

Click any question to see the full explanation, or start a practice session above.

1

You are configuring a new NGFW and need to ensure administrative access is restricted to a specific management subnet. Which interface setting should you modify to enforce this?

Easy
2

Which of these is a valid way to define a source IP in a policy?

Easy
3

What is the best way to monitor the firewall's CPU and memory usage?

Medium
4

Which THREE items are defined in an IKE Crypto Profile?

Medium
5

What is the purpose of 'Path Monitoring' in HA?

Hard
6

A network administrator is deploying a Palo Alto Networks firewall in Layer 3 mode. The firewall has two interfaces: ethernet1/1 connected to the internet and ethernet1/2 connected to the internal network. The administrator wants to enable the firewall to route traffic between these interfaces and perform security inspections. Which configuration is required to allow traffic to flow between the two interfaces?

Medium
7

You are troubleshooting a REST API integration where Python scripts are failing to retrieve device information. The API returns a '403 Forbidden' error. What is the most likely cause?

Hard
8

Where do you configure the DNS servers that the firewall itself uses to resolve hostnames for updates?

Easy
9

How can you verify the status of a tunnel interface?

Medium
10

Which tool in the Palo Alto Networks ecosystem is designed specifically for automated orchestration of security workflows?

Medium
11

What is the purpose of the 'Policy Optimizer' feature?

Hard
12

In GlobalProtect, what is the 'Portal' vs. 'Gateway'?

Hard
13

An engineer is configuring a new firewall in a high-availability (HA) active/passive pair. The engineer wants to ensure that the HA1 control link and HA2 data link are properly configured for redundancy. The engineer decides to use the management interface for HA1 and a dedicated data interface for HA2. Which statement is correct regarding this configuration?

Hard
14

An administrator is configuring a Palo Alto Networks firewall to act as a DHCP server for a subnet. The firewall interface is configured with a static IP address. Which additional step is required to enable DHCP server functionality on that interface?

Medium
15

Which TWO of the following settings are required when configuring a Service Route to ensure the firewall uses a specific interface for external traffic?

Medium
16

A network engineer is configuring a Palo Alto Networks firewall to connect to an ISP using PPPoE. The ISP requires the firewall to obtain its public IP address dynamically via PPPoE. Which interface type should be configured on the firewall's Ethernet interface?

Medium
17

An administrator needs to automate the process of updating a dynamic address group based on external threat intelligence. Which PAN-OS feature allows the firewall to automatically update the group members from an external HTTP source?

Easy
18

When configuring an interface, what is the role of a 'Security Zone'?

Medium
19

In a Site-to-Site VPN, which setting determines how the firewall handles traffic that does not match the phase 2 selector?

Hard
20

What is the purpose of an 'Aggregate Ethernet' interface?

Medium
21

Which TWO interface types support IP addresses?

Easy
22

What is the default action for the 'interzone-default' security policy?

Easy
23

A network engineer is configuring a Palo Alto Networks firewall to use DHCP on an interface for management access. The engineer wants the firewall to obtain an IP address from a DHCP server and also send its hostname to the DHCP server for DNS registration. Which DHCP client option should the engineer enable?

Medium
24

Which TWO of the following are valid methods to authenticate administrators to the firewall?

Medium
25

A network administrator is configuring a Palo Alto Networks firewall and needs to assign an IP address to an interface that will be used for management access. The administrator wants to ensure that the interface is dedicated for management and cannot be used for data traffic. Which interface type should be configured?

Easy
26

An administrator is troubleshooting a routing issue on a PAN-OS firewall. The firewall has two virtual routers: VR1 and VR2. Interface ethernet1/1 is assigned to VR1, and ethernet1/2 is assigned to VR2. A packet arrives on ethernet1/1 destined for a network reachable via ethernet1/2. How does the firewall determine which virtual router to use for the packet?

Hard
27

Which THREE features are associated with Threat Prevention?

Hard
28

What is the default behavior when a firewall is configured for HA but the control link fails?

Easy
29

An engineer is configuring a Palo Alto Networks firewall to advertise a default route into an OSPF area. The firewall must originate the default route only when its own route to 0.0.0.0/0 is present and stable. Which OSPF configuration accomplishes this?

Medium
30

Which TWO of the following are valid methods for an administrator to authenticate to the Palo Alto Networks firewall management plane?

Medium
31

What happens if a zone is not assigned to an interface?

Medium
32

Which TWO issues can prevent BGP from reaching the 'Established' state?

Hard
33

In a complex automation environment, how can you ensure the integrity of the firewall configuration across multiple automated runs?

Hard
34

Which TWO items must match for an OSPF adjacency to form?

Easy
35

A security engineer is writing a Python script to automate the creation of a security rule on a Palo Alto Networks NGFW using the PAN-OS XML API. The script must ensure that the rule is placed in the correct position in the rulebase and that the configuration is committed. Which sequence of API calls should the script perform?

Hard
36

Which THREE steps are involved in the standard User-ID agentless configuration?

Hard
37

What must you do after making any change in the web interface to make it active?

Easy
38

Which TWO actions are required to successfully integrate a new External Dynamic List (EDL)?

Medium
39

When configuring an interface for DHCP client, where do you set this?

Medium
40

You are experiencing issues with traffic passing through the firewall. What command is used to see the session table in the CLI?

Medium
41

Which TWO items are required to configure a site-to-site IPsec VPN?

Medium
42

Which THREE items can be assigned to a Security Zone?

Medium
43

An engineer configures a Layer 3 interface with IP 10.1.1.1/24 and assigns it to the 'trust' zone. A second interface with IP 10.1.1.2/24 is assigned to the 'untrust' zone. After committing, the engineer notices that traffic between the two zones is blocked, and the firewall logs show 'route lookup failed' for packets arriving on the trust interface destined to 10.1.1.2. What is the most likely cause?

Medium
44

A administrator is configuring a VPN. What does the 'Local IP' in the IKE Gateway represent?

Medium
45

How do you back up the firewall's configuration?

Medium
46

A network administrator is setting up a new firewall and needs to configure the management interface. The firewall will be managed out-of-band, and the administrator wants to ensure that management traffic is isolated from data traffic. Which interface type should be used for the management interface?

Easy
47

A network engineer is configuring a Palo Alto Networks firewall to route traffic between two internal networks: 172.16.1.0/24 on Ethernet1/1 and 172.16.2.0/24 on Ethernet1/2. The firewall has a single virtual router. The engineer wants to ensure that traffic from 172.16.1.0/24 to 172.16.2.0/24 is routed correctly. Which configuration is required?

Hard
48

You are deploying a new Palo Alto Networks NGFW at a branch office. The branch has a single ISP link that provides both IPv4 and IPv6 connectivity. You need to configure the firewall's external interface to obtain both an IPv4 and an IPv6 address dynamically from the ISP. What should you do?

Medium
49

A network engineer is deploying a pair of PA-3220 firewalls in an active/passive high availability configuration. The firewalls connect to a Cisco switch that requires the use of Link Aggregation Control Protocol (LACP) for all uplinks. The engineer wants to ensure that the dataplane interfaces on both firewalls can be aggregated into a single logical link that the switch sees as one port-channel, even though only the active firewall forwards traffic. What should the engineer configure on the Palo Alto Networks firewalls?

Medium
50

How do you ensure that only the most secure TLS versions are used for management access?

Hard
51

You are troubleshooting a REST API integration issue where the firewall returns '400 Bad Request'. What should you check first?

Hard
52

An administrator wants to change the firewall's hostname and configure the timezone to UTC. Which configuration path should the administrator use?

Easy
53

A security engineer is configuring a new Palo Alto Networks firewall to participate in a dynamic routing environment. The engineer needs to enable OSPF on the firewall and ensure that it can form adjacencies with neighbors on multiple interfaces. Which two tasks must be completed to enable OSPF on the firewall? (Choose two.)

Medium
54

When using the Panorama XML API for a batch operation, what is the purpose of the 'type=config' parameter?

Medium
55

What is the primary function of a Virtual Router?

Easy
56

Which THREE routing protocols can be configured on a PAN-OS virtual router?

Hard
57

You are configuring a Palo Alto Networks firewall to authenticate administrators using an external LDAP server. You want to ensure that only members of the 'IT-Admins' group can log in with read-write privileges, while other authenticated users have read-only access. What should you configure?

Medium
58

Which THREE options are available under the 'Actions' tab of a Security Policy?

Hard
59

How does the firewall determine which virtual router to use for a packet?

Medium
60

An engineer is configuring a new Palo Alto Networks firewall for a branch office. The service provider has assigned a single public IP address, but the branch needs to support both a guest network and a corporate network, each with its own public-facing services. The engineer wants to avoid purchasing additional public addresses. Which PAN-OS feature should be used to map the single public IP to multiple internal servers based on the destination port?

Easy
61

You are configuring a Security Profile to detect and prevent malware. Which profile is most appropriate for identifying malicious files being downloaded?

Medium
62

What is the consequence of having overlapping IP subnets on different interfaces?

Hard
63

When using OSPF, what is the 'Router ID' used for?

Hard
64

An engineer is configuring a Palo Alto Networks firewall to use a custom certificate for the management interface (Web UI). The certificate is issued by an internal CA and has a CN of 'firewall.example.com'. After importing the certificate and private key, the engineer configures the management interface to use this certificate. However, when accessing the Web UI via https://firewall.example.com, the browser still shows a certificate warning. What is the most likely cause?

Hard
65

A security administrator is configuring a new Palo Alto Networks firewall to participate in a dynamic routing environment. The firewall must exchange routes with an OSPF neighbor and also advertise a static default route into OSPF. The administrator has already configured the router ID and enabled OSPF on the relevant interfaces. Which two additional configurations are required to successfully advertise the default route into OSPF? (Choose two.)

Hard
66

An administrator wants to use a specific user's group membership for policy enforcement. What is the requirement?

Medium
67

Where do you view the system logs to troubleshoot hardware issues?

Easy
68

A network engineer is configuring a Palo Alto Networks firewall to act as a DHCP server for a guest network. The engineer wants the firewall to assign IP addresses to guests and also provide DNS server information. Which configuration step is necessary to achieve this?

Medium
69

Which type of interface is used for connecting to a Layer 3 network?

Easy
70

A network engineer is configuring a Site-to-Site VPN between two Palo Alto Networks firewalls. The engineer needs to assign an IP address to the tunnel interface. Where is this configuration performed?

Medium
71

A network engineer is configuring a PAN-OS firewall to participate in a dynamic routing environment. The firewall must form an OSPF adjacency with a neighboring router over a Layer 3 interface. The interface is already configured with an IP address and is assigned to a security zone. Which additional configuration step is required to enable OSPF on this interface?

Medium
72

What is a 'Layer 3' interface in PAN-OS?

Easy
73

Which THREE actions should be performed during a standard automation failure troubleshooting process?

Hard
74

When managing multiple firewalls through Panorama, what is the best way to ensure an automation script performs the same action on all devices in a device group?

Medium
75

Which component is required to enable a firewall to act as an OSPF Area Border Router (ABR)?

Easy
76

A security automation team is using the PAN-OS XML API to programmatically create and commit a new security policy rule. The script authenticates with an API key and sends an XML document to the /api/ endpoint. The rule is created but does not appear in the running configuration. Which TWO actions must the script perform to make the rule active? (Choose two.)

Hard
77

Which TWO types of logs can be forwarded to an external server?

Medium
78

A network engineer is configuring a Palo Alto Networks NGFW with a single virtual router that has two ISP-facing interfaces: ethernet1/1 (default route to 203.0.113.1) and ethernet1/2 (default route to 198.51.100.1). The engineer wants the firewall to automatically use ethernet1/2 when ethernet1/1 fails. What should the engineer configure?

Medium
79

An engineer is troubleshooting a Palo Alto Networks firewall that is not forming an OSPF adjacency with a neighboring router. The engineer verifies that the interfaces are up, IP addresses are correct, and OSPF is enabled on both devices. The firewall is configured with an OSPF area ID of 0.0.0.1, and the neighbor is in area 0.0.0.0. The engineer checks the OSPF neighbor state and sees it stuck in EXSTART. What is the most likely cause of the problem?

Hard
80

How do you add a new interface to an existing zone?

Easy
81

Which THREE data sources can an NGFW use to dynamically populate address objects?

Hard
82

What is the benefit of using a Loopback interface for a GlobalProtect portal?

Medium
83

When configuring OSPF on a PAN-OS firewall, what is the impact of setting the dead interval to a value different from the neighbor?

Hard
84

An administrator wants to trigger a script automatically when a security policy is matched. Which feature can be used to send a notification to an external web server?

Medium
85

Which THREE components are necessary to successfully implement SSL Forward Proxy?

Hard
86

You notice that the firewall is not identifying traffic as 'web-browsing' even though it is on port 80. What is the most likely cause?

Hard
87

Which action in a security policy should be used to drop traffic silently without sending a notification to the client?

Medium
88

Why might OSPF adjacency stay in 'ExStart/Exchange' state?

Hard
89

A security engineer needs to retrieve the current running configuration from a Palo Alto Networks firewall using the XML API. The engineer wants to ensure the response is in a structured format that can be easily parsed by a Python script. Which API request type should be used?

Easy
90

An administrator is using the PAN-OS REST API to retrieve the list of all security rules in the 'Shared' policy. Which HTTP method and endpoint should be used?

Medium
91

An engineer is writing a Python script using the pan-os-python library to update an address group on a PA-VM firewall. The script must ensure that the change is only staged and not committed until a separate approval process completes. Which method should be used to push the modified configuration to the firewall's candidate configuration?

Medium
92

An automation engineer is deploying a new firewall using a bootstrapping process. The engineer needs to ensure that the firewall automatically registers with Panorama and receives its license and configuration after the initial boot. Which component must be included in the bootstrap package to enable automatic registration with Panorama?

Medium
93

You are troubleshooting GlobalProtect and notice the client cannot reach internal resources. Which routing issue is most likely?

Hard
94

Which TWO settings are required to configure an Interface Management Profile?

Medium
95

Which feature helps to identify and block traffic from compromised hosts based on suspicious behavior?

Medium
96

A network engineer is setting up a site-to-site VPN between two Palo Alto Networks firewalls. The engineer wants to ensure that the VPN tunnel interface IP addresses are configured correctly. Where should the tunnel interface IP address be configured in PAN-OS?

Hard
97

Which TWO settings are configured in a Virtual Router?

Easy
98

An engineer is integrating a Palo Alto Networks NGFW with a CI/CD pipeline to automate policy updates. The pipeline uses the XML API and must ensure that changes are validated before committing. Which two actions are required to achieve this? (Choose two.)

Medium
99

Which object type should be used to group multiple IP addresses to simplify security policy management?

Medium
100

A administrator needs to route traffic to an internal network via a tunnel. Where is the static route configured?

Medium
101

Which tab allows you to configure the firewall's hostname and domain?

Easy
102

You are setting up a new Palo Alto Networks firewall in a branch office. The management interface needs to be reachable from the internal network for administrators to manage the device. You have configured the management interface with an IP address and default gateway. Which additional configuration is required to allow management access from the internal network?

Easy
103

Which tab is used to view real-time log activity?

Medium
104

A security team wants Panorama to automatically push a new security policy rule to all managed firewalls as soon as a change is saved in a specific device group. Which Panorama feature should they configure to accomplish this?

Easy
105

You are configuring an Auto-Scaling Group in AWS with the VM-Series. During the bootstrap process, which file is mandatory to ensure the firewall registers with Panorama successfully?

Hard
106

Where do you configure the tunnel interface IP address in a Site-to-Site VPN setup?

Easy
107

A security automation script uses the XML API to retrieve logs from a Palo Alto Networks firewall. The script needs to filter logs for a specific source IP and time range. Which API request correctly retrieves the filtered logs?

Hard
108

Which TWO types of files can be included in a bootstrap package?

Medium
109

An administrator is configuring a Palo Alto Networks firewall to act as a DHCP server for a guest network. The guest network is on a Layer 3 interface with IP address 192.168.100.1/24. The administrator wants to provide IP addresses to guests in the range 192.168.100.10 to 192.168.100.200, with a lease time of 1 hour, and also provide DNS server 8.8.8.8. Which two configuration items are required to accomplish this? (Choose two.)

Medium
110

When automating log forwarding to an external SIEM, what is the best practice regarding the management plane load?

Hard
111

Which object type should you use to handle large lists of URLs that you want to block or allow?

Medium
112

In BGP, which attribute is used to influence the path selection for outgoing traffic?

Hard
113

A security engineer needs to programmatically create a new address object in a Palo Alto Networks NGFW using the XML API. The engineer authenticates with an API key and sends a POST request to /api/?type=config&action=set&xpath=/config/devices/entry/vsys/entry[@name='vsys1']/address&element=<entry name='WebServer'><ip-netmask>10.1.1.5/32</ip-netmask></entry>. The API returns a success response. However, the address object does not appear in the candidate configuration when checked via the web interface. What is the most likely cause?

Medium
114

An engineer is configuring a new Layer 3 interface on a PA-5220 firewall. The interface will connect to a core switch and must participate in dynamic routing using OSPF. The interface is assigned to the 'trust' zone and a virtual router named 'VR-Trust'. After committing, the engineer notices that OSPF adjacencies are not forming. What is the most likely cause?

Medium
115

A network architect is designing a Palo Alto Networks firewall deployment with two virtual routers. The firewall has two interfaces, Ethernet1/2 and Ethernet1/3, both assigned to different zones. The architect wants to ensure that traffic from Ethernet1/2 can reach Ethernet1/3 without being routed through an external device. Which configuration is necessary?

Hard
116

An administrator wants to use a script to back up firewall configurations daily. Which management interface service must be enabled to allow the script to download the config file?

Easy
117

You are setting up a new Palo Alto Networks NGFW and need to configure the management interface. Which parameter must be configured to allow administrative access from a remote subnet?

Easy
118

Which TWO conditions can trigger an HA failover?

Hard
119

Which THREE items are part of the 'Device > Setup' configuration?

Hard
120

Which option is required to use an interface in a security policy?

Easy
121

A security team is integrating a Next-Generation Firewall with an orchestration platform using the XML API. The platform needs to retrieve the current running configuration of a specific security policy rule named 'Allow-Web'. Which API request should the engineer use?

Hard
122

You need to configure a Palo Alto Networks firewall to resolve domain names for its management traffic. Which DNS configuration should you set?

Medium
123

An administrator needs to quickly identify if an API call was successful from the firewall side. Which log should be reviewed?

Easy
124

What is the purpose of a 'Zone' in a Palo Alto Networks firewall?

Medium
125

Which feature allows an NGFW to dynamically update security objects based on an external feed such as an IP list or URL list?

Medium
126

Which tab is used to configure logging settings for a specific security policy?

Easy
127

Which TWO types of NAT are supported in PAN-OS?

Medium
128

An engineer is automating a Next-Generation Firewall to dynamically register IP addresses from a custom cloud inventory system. The solution must update a Dynamic Address Group (DAG) using the XML API. After authenticating, the engineer sends a request to the /api/?type=user-id&action=set endpoint with an XML payload containing <entry ip="10.1.1.5" persistent="0"/> inside a <register> tag. The API responds with success, but the address does not appear in the DAG. What is the most likely cause?

Medium
129

An administrator is using Terraform to manage Palo Alto Networks security policies. Which provider resource is used to create a security rule?

Medium
130

In an AWS Lambda function automating firewall changes, why should you use the 'pan-os-python' library with 'xapi' directly rather than the higher-level classes?

Hard
131

When utilizing the Panorama plugin for AWS, what is the primary benefit of the 'S3 bucket' integration for log ingestion?

Medium
132

A administrator needs to allow traffic between two zones using a specific sub-interface. Which configuration step is mandatory?

Medium
133

You are automating firewall policy updates using the XML API. You have successfully authenticated and retrieved an API key. When attempting to perform an 'edit' operation on a security policy, the API returns an 'Invalid Object' error, even though the object exists in the GUI. What is the most likely cause?

Hard
134

An engineer is configuring a pair of Palo Alto Networks firewalls in an active/passive high availability (HA) setup. The firewalls are connected to a Layer 3 switch that runs OSPF. The engineer wants the passive firewall to advertise a higher OSPF cost for the internal network so that traffic only uses the passive firewall if the active firewall fails. Which PAN-OS feature should be configured to achieve this?

Medium
135

Where do you configure the 'Heartbeat' interval for HA?

Medium
136

An administrator is configuring a new firewall and needs to set up a virtual router to route traffic between two subnets. The firewall has two interfaces: ethernet1/1 (IP 10.1.1.1/24) and ethernet1/2 (IP 10.2.2.1/24). The administrator wants to ensure that traffic from 10.1.1.0/24 to 10.2.2.0/24 is routed correctly. Which configuration is required?

Medium
137

Which THREE components are involved in a VPN tunnel setup?

Medium
138

A network administrator is setting up a new Palo Alto Networks firewall and needs to configure a Layer 3 interface to connect to the internal network. The interface will be used to route traffic between different zones. Which configuration step is required to assign an IP address to the interface?

Easy
139

What is the default port for the Panorama XML API?

Easy
140

What is the purpose of an Aggregate Ethernet (AE) interface?

Easy
141

Which TWO methods are used to troubleshoot GlobalProtect connectivity issues?

Hard
142

Which TWO objects can be used as a source in a Security Policy?

Medium
143

You are configuring a Palo Alto Networks firewall to use an external log forwarding profile to send traffic logs to a syslog server. You want to ensure that only traffic logs from a specific security policy are forwarded. What is the correct way to achieve this?

Hard
144

Which file type is required for an External Dynamic List (EDL) to function correctly?

Easy
145

A network engineer is configuring policy-based forwarding (PBF) on a Palo Alto Networks firewall. Traffic from the trust zone to any destination must be forwarded out of a specific next-hop based on the source IP address, but only for HTTP and HTTPS traffic. Which configuration element is required to achieve this?

Hard
146

Which object type is required to enable GlobalProtect access for remote users?

Easy
147

An administrator is using the 'pan-os-python' library to automate address object creation. The script succeeds, but objects do not appear in the GUI. What is missing?

Hard
148

You are configuring a BGP peer. The connection stays in 'Active' state. What is the most likely cause?

Hard
149

What is the recommended way to manage certificates on a Palo Alto Networks firewall?

Medium
150

How do you ensure that the firewall automatically blocks traffic from a list of known malicious IP addresses?

Medium
151

Which Palo Alto Networks tool provides a programmatic interface to automate firewall configuration and operational tasks via Python?

Easy
152

Which THREE items are found under the 'Network' tab?

Hard
153

An engineer is configuring a Palo Alto Networks firewall to participate in a dynamic routing environment. The firewall has two interfaces in the same virtual router: ethernet1/1 (192.168.1.1/24) and ethernet1/2 (10.0.0.1/24). The engineer wants to enable OSPF on both interfaces and ensure that the firewall becomes the designated router (DR) on the 192.168.1.0/24 network. Which configuration is required?

Hard
154

An administrator wants to ensure that internal users only access approved websites. Which profile is used?

Medium
155

A client is receiving a 'Gateway not reachable' error in GlobalProtect. What is a common troubleshooting step?

Hard
156

A network administrator is configuring a new Palo Alto Networks firewall and needs to set up a default route to the internet. The next-hop IP address is 203.0.113.1, reachable via the ethernet1/1 interface. Which configuration step is required to ensure that the firewall can forward traffic to the internet?

Easy
157

Which TWO components are involved in configuring GlobalProtect?

Easy
158

Which TWO commands are useful for troubleshooting OSPF?

Hard
159

What is the purpose of a Security Zone?

Easy
160

A network administrator needs to configure a Palo Alto Networks firewall to send syslog messages to an external server for auditing. Which configuration path should the administrator use to add a syslog server?

Easy
161

Which TWO types of failover can be configured in HA?

Hard
162

If you have a primary and secondary firewall, what is the best way to synchronize configuration changes?

Hard
163

An automation script uses the PAN-OS XML API to modify a security rule. After a successful edit request, the script immediately calls the commit endpoint, but the firewall commits an older version of the rule than the script intended. The script does not use a candidate configuration lock. What is the most likely cause?

Hard
164

Which THREE factors can affect the speed/throughput of a VPN tunnel?

Medium
165

A security engineer is configuring a new Palo Alto Networks firewall in a data center. The firewall has two ISP connections: one primary and one backup. The engineer wants to ensure that outbound traffic uses the primary ISP and only fails over to the backup ISP if the primary fails. The engineer has configured two default routes with different metrics. Which additional configuration is required to ensure that the firewall can detect a failure on the primary ISP path and automatically switch to the backup?

Medium
166

What is the purpose of an HA Control Link?

Easy
167

Which TWO items can be configured in a Virtual Router?

Medium
168

A company uses a SOAR platform to enrich and block indicators of compromise. The SOAR playbook must add malicious IP addresses to an External Dynamic List (EDL) hosted on an internal web server that the firewall already consumes. Which action should the playbook take?

Medium
169

You are configuring a Palo Alto Networks firewall to perform decryption of outbound SSL traffic for a specific set of users. You have created a decryption policy that matches the traffic and applied a decryption profile. However, after committing, you notice that some websites are not being decrypted, and users report certificate errors. You have verified that the forward trust certificate is installed and trusted by the endpoints. What is the most likely cause for the websites not being decrypted?

Hard
170

In BGP, what is a 'Route Map' used for?

Hard
171

An administrator is configuring a new Palo Alto Networks firewall at a branch office. The ISP provides a single physical link that delivers both internet traffic (untagged) and IPTV multicast traffic (VLAN 300). The administrator wants to give the IPTV traffic its own security zone and apply a distinct security policy, while keeping the internet traffic in the existing untagged zone. Which configuration should the administrator use on the physical interface?

Medium
172

An administrator is configuring a site-to-site VPN between two PAN-OS firewalls. The VPN will use a tunnel interface to route traffic. The administrator has created the IKE gateway and IPsec crypto profile. Which additional configuration is required to assign an IP address to the tunnel interface?

Medium
173

What is the primary function of a Security Profile Group?

Medium
174

A cloud automation team is deploying VM-Series firewalls in AWS using Terraform. They need to bootstrap the firewalls with a Panorama server configuration. The team wants to ensure the firewalls automatically connect to Panorama upon deployment. Which file must be included in the bootstrap package to specify the Panorama server IP address and auth key?

Hard
175

A network security engineer is deploying a Palo Alto Networks NGFW in a data center that uses a single public IP address block. The engineer must allow several internal web servers to be reached from the internet using different public IP addresses, but only has one egress interface. Which configuration should be used to meet this requirement?

Medium
176

You have a Palo Alto Networks firewall deployed in a data center with two ISPs. You need to configure the firewall so that if the primary ISP link fails, traffic automatically fails over to the secondary ISP without manual intervention. You have already configured both ISP interfaces with static IPs and default routes with different metrics. Which additional configuration is required to enable automatic failover?

Medium
177

A firewall administrator is configuring a Palo Alto Networks NGFW and needs to ensure that management access to the firewall's web interface is only allowed from the internal network 10.0.0.0/24. The management interface is on a dedicated out-of-band network. Which configuration should the administrator use?

Easy
178

A security engineer is using the PAN-OS XML API to update the description of an existing address object named 'WebServer' in the 'Shared' location. The API request is sent with the correct API key and the following XPath: /config/shared/address/entry[@name='WebServer']. The server responds with a '403 Forbidden' error. What is the most likely cause?

Medium
179

A security automation team uses the PAN-OS XML API to programmatically create a new security policy rule. The script authenticates with an API key and sends a POST request to the firewall. The API returns a success status, but the rule does not appear in the web interface. What is the most likely reason?

Medium
180

A security automation team is integrating a Palo Alto Networks NGFW with a third-party orchestration platform. The platform requires the firewall to send logs to an external syslog server for correlation. The team must configure the firewall to forward traffic logs to the syslog server. Which two configuration elements are required on the firewall to forward traffic logs to an external syslog server? (Choose two.)

Hard
181

A security engineer is automating the deployment of security policies using Panorama and the PAN-OS XML API. The engineer must ensure that the API calls are properly authenticated and that the changes are committed to the managed firewalls. Which TWO steps are required to successfully push the configuration to the managed devices? (Choose two.)

Hard
182

An engineer is setting up a new Palo Alto Networks firewall and needs to configure the device to send logs to an external syslog server. Which configuration step is required to ensure that logs are forwarded to the syslog server?

Easy
183

Which object should be configured for a server that needs to be accessed from the internet via a public IP?

Medium
184

An engineer is configuring a new Palo Alto Networks firewall for a branch office. The ISP provides a single physical link that must carry both the untagged corporate traffic and a VLAN-tagged guest network. The engineer assigns the physical interface as a Layer 3 interface and creates a subinterface. Which additional step is required to allow the guest VLAN traffic to flow through the firewall?

Medium
185

How do you ensure that a specific security policy rule is only active during business hours?

Hard
186

Which THREE items are required to configure a Site-to-Site VPN?

Medium
187

Which TWO authentication protocols are commonly supported by PAN-OS for VPN user authentication?

Medium
188

Why might a static route not be visible in the routing table?

Hard
189

Which interface type is used to manage the firewall over the network?

Easy
190

A security engineer is writing a Python script to automate the creation of address objects on a Next-Generation Firewall using the PAN-OS XML API. The script must authenticate using an API key. Which HTTP header should be used to pass the API key in the request?

Easy
191

You are configuring a Palo Alto Networks NGFW to enforce a security policy that allows only HTTP and HTTPS traffic from the untrusted zone to the DMZ. You want to ensure that the firewall performs application identification and applies the appropriate security profiles. Which tab in the WebUI do you use to create the security policy rule?

Medium
192

An engineer is configuring a Palo Alto Networks firewall to authenticate administrators against an external LDAP directory. The security team requires that only members of the group 'NGFW-Admins' can log in with full read-write access, while members of 'NGFW-Auditors' must receive read-only access. Which two configuration steps are required on the firewall to meet these requirements? (Choose two.)

Medium
193

A junior administrator is setting up a new Palo Alto Networks NGFW and wants to change the idle timeout for administrators logged into the Web UI so that sessions expire after 30 minutes of inactivity. Where should this change be made?

Easy
194

Which TWO features require a valid subscription license?

Medium
195

Which TWO methods can be used to update the security policy on a Palo Alto Networks NGFW programmatically?

Medium
196

You are deploying a pair of Palo Alto Networks NGFWs in an active/passive high availability configuration. The two firewalls are directly connected via a dedicated HA link. You need to ensure that the passive firewall takes over seamlessly if the active firewall fails, preserving existing sessions. Which HA setting should you configure to achieve this?

Medium
197

When using the Panorama API to push a configuration, what is the 'xpath' parameter used for?

Hard
198

An administrator is configuring a new Palo Alto Networks firewall and needs to assign an IP address to a physical interface that will be used as a Layer 3 gateway for a subnet. The interface must be able to route traffic between different zones. Which interface type should the administrator configure?

Easy
199

A network security administrator is deploying a pair of Palo Alto Networks NGFWs in an active/passive high availability configuration at a data center. The two firewalls are connected by a dedicated HA link, and each has its own management interface. The administrator needs to ensure that after a failover, the new active device automatically takes over the management IP address that administrators use to reach the Web UI, without requiring DNS changes. Which setting must be configured?

Medium
200

In an HA active/passive configuration, which mechanism ensures the passive firewall is ready to take over traffic?

Medium
201

Which setting in a Security Policy rule determines whether traffic is permitted or denied?

Medium
202

You are configuring an External Dynamic List (EDL) on the firewall. What is the required format for the list file?

Medium
203

An engineer is configuring a new Palo Alto Networks firewall at a branch office. The ISP provides a /30 public subnet on GigabitEthernet1/1, and the internal network uses 10.10.10.0/24 on GigabitEthernet1/2. The branch also has a separate guest network 10.20.20.0/24 that must be reachable from the corporate network via an IPsec tunnel. The engineer wants the firewall to route traffic between the internal, guest, and tunnel networks without creating multiple virtual routers. Which configuration should be used?

Medium
204

Which THREE things must be configured to allow HA between two firewalls?

Medium
205

A network administrator is setting up a Palo Alto Networks firewall and needs to configure an interface for outbound internet access. The ISP provides a static IP address, and the administrator wants to ensure that return traffic from the internet can reach the internal network. Which type of interface configuration is required?

Easy
206

You are configuring a new Palo Alto Networks firewall and need to set up the management interface. You want to ensure that the firewall can be managed from a secure network and that administrative access is restricted. Which configuration should you apply to the management interface?

Easy
207

An administrator is configuring a Palo Alto Networks firewall to support a site-to-site VPN with a remote peer. The administrator needs to ensure that the firewall can route traffic to the remote network through the VPN tunnel. Which two configurations are required on the firewall to enable routing of traffic into the tunnel? (Choose two.)

Medium
208

Which TWO items must be configured to allow external management access?

Easy
209

An engineer is configuring a new virtual router on a PA-3220. The virtual router will use OSPF to exchange routes with a neighboring router. The engineer wants to ensure that the firewall forms an OSPF adjacency and advertises the connected subnet of the firewall's Layer 3 interface. Which two configuration steps are required in PAN-OS? (Choose two.)

Hard
210

Which TWO protocols are commonly used for log forwarding to SIEMs?

Medium
211

You are configuring a Palo Alto Networks firewall for a branch office that uses a single public IP address from the ISP. The ISP has assigned you 203.0.113.10/32 and requires that all outbound traffic from the 192.168.10.0/24 network appears to originate from that address. You must ensure return traffic is correctly routed back to the originating internal host. Which NAT configuration should you implement?

Medium
212

An engineer is configuring a new Palo Alto Networks firewall for a branch office. The branch uses a single ISP connection, and the engineer wants to dynamically learn the default route from the ISP's router without manually configuring a static route. The ISP's router is configured to send OSPF LSAs, but the firewall is not forming an adjacency. The engineer has verified that the interface is up and IP addressing is correct. Which configuration step is required on the firewall to successfully form an OSPF adjacency with the ISP router?

Medium
213

You need to automate the retrieval of URL filtering logs from the firewall. Which API endpoint type is used to execute a 'show' command?

Medium
214

Which command confirms that an OSPF neighbor relationship is in the 'Full' state?

Hard
215

You need to perform a packet capture on a specific firewall interface. Which tool is used?

Hard
216

If a Python script interacting with the XML API experiences '503 Service Unavailable', what is the most likely reason?

Hard
217

Which TWO actions must be performed to successfully configure a zone protection profile on a zone?

Medium
218

What is the effect of changing the HA heartbeat interval?

Hard
219

What happens to established sessions during an HA failover?

Hard
220

You are managing a firewall and need to ensure that dynamic updates are downloaded automatically. Where do you configure the schedule for these updates?

Easy
221

What is the recommended method to update the firewall's threat signatures?

Medium
222

An administrator is configuring a Palo Alto Networks firewall to route traffic between two internal networks. The firewall has two Layer 3 interfaces, Ethernet1/1 and Ethernet1/2, each assigned to different security zones and different virtual routers. The administrator wants traffic from the trust zone to reach the untrust zone, but the firewall is not routing the traffic. What is the most likely cause?

Medium
223

What is the function of a 'Tap' mode interface?

Easy
224

In a cloud-init deployment, which directory must the bootstrap package be placed for the VM-Series firewall to automatically detect and process it during the first boot?

Hard
225

An automation engineer is using the PAN-OS XML API to modify an existing security policy rule. The script retrieves the current rule configuration, changes the action from 'allow' to 'deny', and sends the updated XML back to the firewall. However, the API returns an error indicating that the rule already exists. What is the most likely cause?

Hard
226

You are configuring a Palo Alto Networks firewall to integrate with an external LDAP server for User-ID. You have configured the LDAP server profile and the User-ID agent, but users are not being identified in the traffic logs. You have verified that the firewall can reach the LDAP server and that the agent is connected. Which action should you take next to troubleshoot the issue?

Hard
227

An engineer is configuring a Palo Alto Networks firewall to allow management access only from a secure internal subnet. The firewall's management interface is currently on the default 192.168.1.1/24 network. The engineer wants to restrict management access to the 10.10.10.0/24 subnet and ensure that only HTTPS is used. Which configuration should be applied?

Medium
228

Which TWO protocols can be used to manage the firewall?

Easy
229

In HA, what is the difference between 'Active/Passive' and 'Active/Active' modes?

Medium
230

When configuring HA, what is 'Preemption'?

Medium
231

An engineer is configuring a Palo Alto Networks NGFW to authenticate administrators using an external LDAP server. The LDAP server uses a self-signed certificate. The engineer needs to ensure that the firewall can validate the LDAP server's certificate during authentication. What should the engineer do?

Hard
232

A network engineer is configuring a site-to-site VPN between two PA-5220 firewalls. The engineer wants to ensure that if the primary ISP link fails, the VPN tunnel automatically re-establishes over a backup ISP link without manual intervention. Both firewalls have two ISP connections and the VPN is configured with a tunnel interface. Which PAN-OS feature should the engineer configure to achieve this?

Hard
233

Which tab is used to configure physical interface settings like speed and duplex?

Easy
234

Which feature is used to ensure the firewall clock is accurate?

Easy
235

A network engineer is configuring a Palo Alto Networks firewall to participate in OSPF with neighboring routers. The engineer wants to ensure that the firewall becomes the Designated Router (DR) on a broadcast network. Which two OSPF parameters should the engineer configure to influence DR election? (Choose two.)

Hard
236

Which THREE configuration items are required in the 'init-cfg.txt' file for a VM-Series firewall to join a Panorama server?

Hard
237

Which THREE items can be used as a 'Source' in a security policy?

Medium
238

Which THREE settings can be modified in a custom Antivirus Profile?

Hard
239

Which CLI command displays the API key if already generated for an admin?

Easy
240

A security engineer needs to retrieve the current running configuration from a Palo Alto Networks firewall using the XML API. Which API request type should be used?

Easy
241

You are configuring a new firewall and need to set up the management interface. You want to restrict management access to only a specific subnet. Which type of interface should you configure to apply a management profile with permitted IP addresses?

Easy
242

What is the primary benefit of using Panorama templates for automation?

Easy
243

When configuring a Static Route, what does the 'Metric' field do?

Medium
244

You are deploying a PA-3200 Series firewall at a branch office. The branch uses a single ISP link and you want the firewall to automatically fail over to a secondary ISP if the primary link goes down. You have both links connected to separate interfaces. Which PAN-OS feature should you configure to achieve this?

Medium
245

What is the purpose of the 'Pan-OS-Python' library's 'refresh_from_candidate' method?

Medium
246

An engineer needs to configure a Palo Alto Networks firewall to act as a DHCP server for a network segment connected to Ethernet1/1. The engineer wants the firewall to assign IP addresses from the 192.168.10.0/24 subnet. Which configuration step is required?

Medium
247

Which tab in the web interface is used to create and manage security policies?

Easy

Frequently asked questions

What does the troubleshooting domain cover on the NGFW-Engineer exam?
troubleshooting questions test whether you can apply the concept in context, not just recognise a definition.
How many questions are in this domain?
This page lists all 247 troubleshooting questions in the NGFW-Engineer question bank. The actual exam draws from this domain proportionally to its weighting in the official exam blueprint.
What is the best way to practise this domain?
Start with a short focused session (10 questions) to identify gaps, then work through explanations. Repeat with a longer session once the weak areas feel solid.
Can I practise only troubleshooting questions?
Yes — the session launcher on this page filters questions to this domain only. Choose any session length for inline explanations and scoring.