Trusted Certificate Authorities
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Trusted Certificate Authorities

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Trusted Certificate Authorities

Trusted Certificate Authorities
Prisma Browser DesktopPrisma Browser ExtensionPrisma Browser for Mobile
Full supportNo support Full support
The Trusted Certificate Authorities control configures which TLS Trust Stores Prisma Browser (PB) relies on to secure communications with backend services and end-user web traffic. This mechanism establishes independent TLS trust configurations to protect against network-level threats, prevent replay and man-in-the-middle (MitM) attacks, and allow management of approved certificates when TLS inspection exclusions cannot be applied.
Configurations and Use Cases
  • Standard Deployments
    • Default Configuration (Best Practice Exclusions Applied):
      • PB Internal Services Traffic: PB Trust Store
      • Browsing Traffic: Device Trust Store
    • Full TLS Inspection (No Exclusions Permitted)
      • PB Internal Services Traffic: PB Trust Store + Proxy CA Certificate
      • Browsing Traffic: Device Trust Store + Proxy CA Certificate
  • Specialized Deployments
    • On-Site Professional Services (User/Group Policy Override):
      • PB Internal Services Traffic: PB Trust Store + Customer Proxy CA Certificate
      • Browsing Traffic: Device Trust Store + Customer Proxy CA Certificate
    • Third-Party Contractors (Unmanaged Devices):
      • Browsing Traffic: PB Trust Store
  1. From Strata Cloud Manager, select ConfigurationPolicyControl SetsBrowser SecurityNetwork Protection
  2. Select Trusted Certificate Authorities.
  3. Select the certificate authorities that are to be trusted by the Prisma Browser (this limits the trust to certificates that are already trusted):
    • Device trust store - Trust the certificate authorities installed in the device's certificate store.
    • Prisma Access Browser trust store - Trust only certificate authorities that are trusted by Palo Alto Networks, and ignores certificates installed in the Device trust store.
    • None - Do not trust certificates in any trust store.
      Prisma Browser for Mobile rules using this control must use one of the Trust Stores. The None option is ignored.
  4. Additional trusted certificate authorities- Add customer-provided certificates not already trusted by the Prisma Browser.
    1. Enter a name for the certificate.
    2. Drag or Browse a certificate in .pem, .der, .crt, or .cer formats.
  5. Click Set.