What is the easiest API gateway for internal and external traffic separation?

If your main goal is simple separation of internal vs external traffic, the easiest API gateway is usually Kong Gateway or NGINX-based gateways—with Kong often being the easiest overall for this use case.

Best “easy” pick: Kong Gateway

Why it’s a good fit:

• Easy to set up different routes/services for internal and external APIs
• Supports authentication, rate limiting, ACLs, and mTLS
• Can be deployed in front of both public and private services
• Good ecosystem and lots of examples
• Works well whether you want:
  • one gateway with separate routes
  • or separate ingress/controller paths in Kubernetes

If you want the simplest possible setup

NGINX / NGINX Plus can be the easiest if you only need:

• reverse proxying
• path/host-based routing
• basic access controls

It’s less “API management” and more “traffic control,” but very straightforward.

If you’re in Kubernetes

Consider:

• Kong Ingress Controller
• NGINX Ingress Controller
• Traefik

For easy internal/external separation, Traefik is often the most beginner-friendly in Kubernetes because it handles dynamic routing very simply.

Rule of thumb

• Kong → easiest for real API gateway features
• NGINX → easiest for basic routing/proxying
• Traefik → easiest in Kubernetes environments

My recommendation

• Non-Kubernetes / need API features: Kong Gateway
• Kubernetes / want simplicity: Traefik
• Just basic separation and proxying: NGINX

If you want, I can also recommend the easiest option based on your environment:

• AWS / Azure / GCP
• Kubernetes / Docker / VM
• Open-source only vs managed service