Details

The Palo Alto Networks security platform can act as a DNS proxy and send the DNS queries on behalf of the clients. DNS queries that arrive on an interface IP address can be directed to different DNS servers based on full or partial domain names.

However, unrelated or unneeded proxy services increase the attack vector surface and add excessive complexity to securing the device.

Solution

Do not configure and enable the DNS Proxy capability.

Go to Network >> DNS Proxy
If there are no entries in the pane, then this capability has not been enabled.

Supportive Information

The following resource is also helpful.

• https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_PAN_Y21M07_STIG.zip

This security hardening control applies to the following category of controls within NIST 800-53: Configuration Management.This control applies to the following type of system Palo_Alto.

References

• 800-53|CM-7a.
• CAT|II
• CCI|CCI-000381
• CSCv6|9.1
• Group-ID|V-62561
• Rule-ID|SV-228839r557387_rule
• STIG-ID|PANW-AG-000037
• STIG-Legacy|SV-77051
• STIG-Legacy|V-62561
• Vuln-ID|V-228839

Source

• Tenable.com/audits