Which on‑box security feature is supported on the Cisco ISR 4451 SD‑WAN but not on vEdge?

The Cisco ISR 4451 SD-WAN supports an Enterprise Firewall with Application Awareness, which is a robust security feature providing deep packet inspection and application-level control. This capability is inherent to the ISR 4451's hardware and software architecture, designed for comprehensive branch security. In contrast, vEdge routers, while offering foundational firewall capabilities, do not natively support the same level of integrated, application-aware enterprise firewall functionality on the device itself. IPsec/GRE cloud proxy and Cloud Express service are general SD-WAN features available across various platforms, including vEdge. Reverse proxy is typically a server-side security component, not a core on-box router feature differentiating these platforms.