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PAN-SEC-021HighPAN-OS

Broad allow rule generalizes earlier specific rules

At a glance

Base severity

High

Area

Security Policies

Platform

PAN-OS

Evidence level

Derived0.90

Benchmark reference

Reads the export, not the device

ConfigProof reads a configuration export. This control is evaluated against the objects in that file, and it reports what the file says. It does not connect to the device and sees no traffic, so a finding here describes the configuration, not what the firewall is doing right now.

Why it matters

A later allow rule is broad enough to cover several earlier specific rules. Traffic it matches beyond them is allowed without the limits those rules set, so the specific rules above it may constrain less than they appear to.

How to fix it

Web interface

The steps below are written for the web interface. A finding raised on your own export carries the same steps with your object names filled in.

  1. Narrow the broad rule to the applications, services and addresses actually required.
  2. Or remove the specific rules it makes redundant, so the policy states its real intent.

Command line

PAN-OS CLI, standalone firewall, vsys1

move vsys vsys1 rulebase security rules <object-name> before <anchor-rule-name>

An example. Values in angle brackets are yours to supply; a finding on your own export fills in the names it read. Nothing here commits. Review the candidate configuration, then commit it yourself.

Read it back

show vsys vsys1 rulebase security rules
Values to fill in2
<object-name>
The object's name, as it appears on your firewall
<anchor-rule-name>
The rule to place this one before
Before you type it1
  • Rule order decides who reaches what. Choose the anchor deliberately.

How to confirm the fix

  • Decide whether the broad rule or the specific ones state the real intent.
  • Run a policy match query for each of the specific rules before removing anything.

Limits

  • A broad rule that exists as a deliberate catch-all for a trusted internal zone can be intentional.

Compliance references

No benchmark recommendation is mapped to this control in this version.

See it on your own firewall

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