No deny rule names the Palo Alto Networks threat IP lists
At a glance
Base severity
Area
Platform
Evidence level
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
Palo Alto Networks publishes lists of addresses known to host malware, high risk addresses and bulletproof hosting. Without a deny rule naming them, traffic to and from those addresses is decided by the ordinary rules like any other.
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.
- Add a deny rule near the top of the rulebase with the lists as source, and another with them as destination.
- Place them above the rules that allow internet traffic, and log them.
Command line
PAN-OS CLI, standalone firewall, vsys1
set vsys vsys1 rulebase security rules <inbound-rule> from any to any source [ panw-highrisk-ip-list panw-known-ip-list panw-bulletproof-ip-list ] destination any application any service any action deny log-end yesset vsys vsys1 rulebase security rules <outbound-rule> from any to any source any destination [ panw-highrisk-ip-list panw-known-ip-list panw-bulletproof-ip-list ] application any service any action deny log-end yesmove vsys vsys1 rulebase security rules <inbound-rule> topmove vsys vsys1 rulebase security rules <outbound-rule> top
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 <inbound-rule>show vsys vsys1 rulebase security rules <outbound-rule>
Values to fill in2
- <inbound-rule>
- A name for the rule denying traffic from the lists
- <outbound-rule>
- A name for the rule denying traffic to the lists
Before you type it1
- The lists are populated only with an active Threat Prevention subscription.
How to confirm the fix
- Confirm both rules are enabled and above the internet allow rules.
- Confirm the lists are populated on the device, which needs an active Threat Prevention subscription.
Limits
- Looks for any enabled deny rule naming each list, in either direction. The recommendation also names the Tor exit list and asks for both directions.
Compliance references
CIS Palo Alto Firewall 11 Benchmark v1.2.0
Covers part of the recommendation
Where a control aligns with a recommendation of the CIS Palo Alto Firewall 11 Benchmark v1.2.0, that recommendation is cited as a reference. Only that version was checked. A reference is not a certification.
More in Security Policies
- PAN-SEC-042Duplicate rules log differently
- PAN-SEC-094Enabled rule names a zone only a disabled tunnel feeds
- PAN-SEC-095Rules can be merged without changing what they permit
- PAN-SEC-104Built-in interzone default rule does not log
- PAN-SEC-164An application override rule is configured to bypass App-ID
- PAN-SEC-170Enabled rule with no hit in the counted window
- ISE-SEC-001Authorization rule grants open access with no condition
- ISE-SEC-002Default authorization rule grants open access
See it on your own firewall
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