Allow rule matches any service
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
Service any opens every TCP and UDP port for the matched applications. With application any as well, the rule restricts neither the application nor the port.
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.
- Set service to application-default when the applications are known.
- Otherwise attach explicit service objects for the ports in use.
Command line
PAN-OS CLI, standalone firewall, vsys1
set vsys vsys1 rulebase security rules <object-name> service <service>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 <object-name>Values to fill in2
- <object-name>
- The object's name, as it appears on your firewall
- <service>
- The ports this application actually uses
Before you type it1
- Narrowing this changes who reaches what. Confirm the new set covers the traffic the application needs.
How to confirm the fix
- Confirm the applications on the rule declare their standard ports before switching to application-default.
- Check the traffic log for denied sessions on non-standard ports after the change.
Limits
- Rules whose action is deny are not flagged: a broad deny is usually correct.
Compliance references
CIS Palo Alto Firewall 11 Benchmark v1.2.0
Covers the whole 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-001Allow rule matches any source and any destination
- PAN-SEC-002Allow rule matches any application
- PAN-SEC-004Disabled rule left in the rulebase
- PAN-SEC-005Rule has no description and no tag
- PAN-SEC-006Temporary rule with no schedule or expiry
- PAN-SEC-007Allow rule with logging fully disabled
- PAN-SEC-008Rule does not log at session end
- PAN-SEC-009Rule has no log forwarding profile
See it on your own firewall
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