Check the listing for details. SonicWall PRO 2040 VPN 1RK0A-02A Firewall Network Security Appliance. Condition: Used. Listed at 29.97 USD. The SonicWALL PRO 2040 VPN 1RK0A-02A Firewall Network Security Appliance is a high-performance security device designed for enterprise networking and server environments. With its robust firewall capabilities, this appliance is able to provide strong protection against network threats and ensure secure access to your network resources. The SonicWALL brand is known for its reliable and user-friendly networking solutions, making the PRO 2040 model a trusted choice for organizations looking to enhance their network security.