Network Security
Security Profile: DNS Security
Table of Contents
Security Profile: DNS Security
DNS Security is a continuously evolving threat prevention service designed to protect
and defend your network from advanced threats using DNS.
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Enable DNS Security to access the full database of
Palo Alto Networks signatures, including those generated using advanced machine learning
and predictive analytics.
DNS Security is a continuously evolving threat prevention cloud service that is designed
to protect and defend your network from advanced DNS-based threats. By applying advanced
machine learning and predictive analytics to a diverse range of threat intelligence
sources, DNS Security rapidly generates enhanced DNS signatures to defend against known
malicious DNS categories, as well as real-time analysis of DNS requests to defend your
network against newly generated and unknown malicious domains. DNS Security can detect
various C2 threats, including DNS tunneling, DNS rebinding attacks, domains created
using auto-generation, malware hosts, and many more. DNS Security requires and works
with your Advanced Threat Prevention or Threat Prevention subscription for complete DNS
threat coverage. Combined with an extensible cloud architecture, DNS Security provides
access to a scalable threat intelligence system to keep your network protections up to
date.
Before you can enable and configure DNS Security, you must obtain and install a Threat
Prevention (or Advanced Threat Prevention) license as well as a DNS Security license in
addition to any platform licenses from where it is operated. Licenses are activated from
the Palo Alto Networks Customer Support Portal and must be active before DNS
analysis can take place. Additionally, DNS Security (similar to other Palo Alto Networks
security services) is administered through security profiles, which in turn is dependent
on the configuration of network enforcement policies as defined through security rules.
Before enabling DNS Security, it is recommended that you familiarize yourself core
components of the security platform in which the security subscriptions are enabled.
Refer to your product documentation for more information.
To enable DNS Security, you must create (or modify) an Anti-Spyware security profile to
access the DNS Security service, configure the log severity and policy settings for the
DNS signature category (or categories), and then attach the profile to a security policy
rule.
Security Profile: DNS Security (Strata Cloud Manager)
Learn how to configure a DNS Security profile in Strata Cloud Manager.
Here's how to configure a DNS Security profile. See Enable DNS Security for detailed
steps.
- Use the credentials associated with your Palo Alto Networks support account and log in to the Strata Cloud Manager on the hub.Verify that a DNS Security and a Threat Prevention (or Advanced Threat Prevention) license is active. Select and click the license usage terms link in the License panel. You should see green check marks next to the following security services: Antivirus, Anti-Spyware, Vulnerability Protection, and DNS Security.Verify that the paloalto-dns-security App-ID in your security policy is configured to enable traffic from the DNS security cloud security service.If your firewall deployment routes your management traffic though an Internet-facing perimeter firewall configured to enforce App-ID security policies, you must allow the App-IDs on the perimeter firewall; failure to do so will prevent DNS security connectivity.Configure DNS Security signature policy settings to send malicious DNS queries to the defined sinkhole.If you use an external dynamic list as a domain allow list, it does not have precedence over the DNS Security domain policy actions. As a result, when there is a domain match to an entry in the EDL and a DNS Security domain category, the action specified under DNS Security is still applied, even when the EDL is explicitly configured with an action of Allow. If you want to add DNS domain exceptions, either configure an EDL with an Alert action or add them to the DNS Domain/FQDN Allow List located in the DNS Exceptions tab.Attach the DNS Security profile to a Security policy rule.A DNS Security profile is only active when it’s included in a profile group that a Security policy rule references. Follow the steps to activate a DNS Security profile (and any Security profile).Test that the policy action is enforced.
Security Profile: DNS Security (PAN-OS & Panorama)
Learn how to configure a DNS Security profile in PAN-OS & Panorama.Here's how to configure a DNS Security profile. See Enable DNS Security for detailed steps.- To take advantage of DNS Security, you must have an active DNS Security and Threat Prevention (or Advanced Threat Prevention) subscription.Verify that you have the necessary subscriptions. To verify which subscriptions that you currently have licenses for, select and verify that the appropriate licenses display and have not expired.Verify that the paloalto-dns-security App-ID in your security policy is configured to enable traffic from the DNS security cloud security service.If your firewall deployment routes your management traffic though an Internet-facing perimeter firewall configured to enforce App-ID security policies, you must allow the App-IDs on the perimeter firewall; failure to do so will prevent DNS security connectivity.Configure DNS Security signature policy settings to send malicious DNS queries to the defined sinkhole.If you use an external dynamic list as a domain allow list, it does not have precedence over the DNS Security domain policy actions. As a result, when there is a domain match to an entry in the EDL and a DNS Security domain category, the action specified under DNS Security is still applied, even when the EDL is explicitly configured with an action of Allow. If you want to add DNS domain exceptions, either configure an EDL with an Alert action or add them to the DNS Domain/FQDN Allow List located in the DNS Exceptions tab.Attach the Anti-Spyware profile to a Security policy rule.Test that the policy action is enforced.
