# gateway (9000-gateway.com)

A gateway is a doorway or entrance, often grand, that leads into a place. People also use it to mean a starting point or an opening into something new, like a gateway to a career or a gateway drug.

## What a model may hear
- API gateway (cloud computing and microservices): route, rate-limit, authenticate, and transform requests between clients and backend services
- network gateway (networking and TCP/IP): act as a node that routes traffic between different networks, often with NAT or protocol translation
- payment gateway (e-commerce and fintech): process, encrypt, and forward transaction data between a merchant and a payment processor
- database gateway (enterprise systems): translate queries and connect applications to heterogeneous data sources
- edge gateway (IoT and industrial systems): aggregate, filter, and preprocess device data before cloud upload

## Where people and models part ways
- Says: "Open the gateway for me"
  Means: Start the process or give access
  May be taken as: Spin up an API gateway service or open a network port, possibly exposing internal services
  Say instead: "Start the approval process or give me access to the system"
- Says: "Close the gateway"
  Means: End a program or stop access
  May be taken as: Terminate a running gateway service, breaking active connections and traffic routing
  Say instead: "End the program or revoke my access"
- Says: "Set up a gateway"
  Means: Create an entry point or landing page
  May be taken as: Deploy a full API gateway infrastructure with routing rules, certificates, and load balancers
  Say instead: "Create a landing page or simple entry point"
- Says: "Gateway to our data"
  Means: An easy way to understand our data
  May be taken as: Interpret as a request for a database gateway or data access API with query translation
  Say instead: "A simple overview or dashboard for our data"

## Tips
- Say 'landing page' or 'starting point' if you mean a conceptual entry, not a technical routing layer
- Specify 'payment' or 'API' before 'gateway' if you do mean the technical kind
- Avoid 'open' and 'close' with gateway; use 'start', 'stop', 'allow', or 'block' instead
- If you want a summary or explanation, say 'overview' rather than 'gateway'
- In cloud contexts, 'gateway' alone usually triggers infrastructure provisioning

## Often confused with
- portal: more often a user-facing web site than a traffic-routing layer
- proxy: intermediates requests without the entry-point connotation
- firewall: blocks traffic rather than routing or translating it
- router: moves packets without application-level logic
- entrypoint: code term for where execution begins, not network access
- load balancer: distributes traffic without protocol translation