Palo Alto: Security Zones, Profiles and Policies (Rules)

Summary:
Security policies (rules) on the palo Alto firewalls are intended to narrow our threat surface. As a firewall administrator or technician, please keep in mind that:

  1. Palo Alto Networks works in what they call security zones for where user and system traffic is coming and going to
  2. Traffic is processed by the security policy in a top-down, left to right fashion.

Note:
You must have security admin permissions and access to your firewall virtual system (vsys) in order to adjust security policies and profiles. Speak to your local firewall admin, or contact cybersecurity@cio.wisc.edu, if you require access.

This document is meant as a high-level intro to security profiles and policies. You can find KB articles with more technical specifics at security profiles and security policies.

Advanced-Protections.png

  • Security Policies:

    • Avoid "rule shadowing" by placing more specific rules above the larger scope rules.

    • Example of correct configuration, host rule above network rule:
      Top-Down Rules

    • Intrazone "traffic within your zone", initial default security policy; if you don't make a rule to block the traffic, the firewall by default will allow it.

      • intrazone default action is allow
    • Interzone "traffic between zones", initial default security policy; if you don't make a rule to allow the traffic, the firewall by default will block it.

      • interzone default action is block
    • You can add the profiles (and profile groups) to your policy rule under the rule settings > "Action" tab:

    Security-policy_Actions-tab.png

    • Security Policies can call a single security profile group:

    Security-Policy_profile-group.png

    • or a choice of individual security profiles:
      Security-Policy_profiles.png


    For more UW Madison Knowledge Bases, see: https://kb.wisc.edu/search.php?q=palo+alto

    For assistance please contact: cybersecurity@cio.wisc.edu