Glossary infra Term Page
Port
A numeric endpoint that distinguishes services on one address
Core Idea
A port is the numeric communication endpoint that tells one IP address which service should receive the traffic. In addresses such as :8080, :5432, or :443, the number after the host points at the actual service.
Why It Matters Here
Mathbong uses ports repeatedly in Docker port mappings, OPNsense exposure rules, and reverse-proxy layouts. Even when the address is correct, the wrong port means you either reach the wrong service or nothing at all.