Primary Responder mode considerations

DAL OS 23.9 and later supports a PRClosed Primary responder mode that can be enabled on any device. When enabled, the device acts as a Primary Responder PR device with a security-hardened, feature-restricted firmware targeted to comply with AT&T FirstNet® and Verizon ResponseVerify™ security requirements.

Features not available

Features available but disabled by default

Features enabled when PR mode is enabled

Telnet

SSH*

FIPS mode

Raw TCP listeners for serial ports

Wi-Fi pre-configured access points

 

Wi-Fi WPA1 encryption

Internal serial console port

 

Backup configuration file restore

USB ports

 

*For DAL OS 25.8 feature release and newer, Primary Responder mode now requires key-based SSH authorization.

Additional considerations

  • Users are prompted to enable two-factor authentication.

  • A notification will appear in both the Web UI and CLI if the DAL device has Primary Responder mode enabled, but there are local users who do not have two-factor authentication enabled.

  • The system custom-default-config CLI command available in release 24.12 cannot be run in Primary Responder mode.