Concepts
Overview
Section titled “Overview”Concepts is a Thinkwise “concepts/POC” environment hosted in the EVEO private network.
Concepts is used as a development environment; see Experience for a customer-facing test environment.
This lane is DEV. Tier model: 3-tier (GUI → App → DB).
Components
Section titled “Components”GUI
- URL:
https://concepts.lef.software/ - Domain: lef.software
- Reverse proxy: web.core.lef
Application tier
- Runtime: Runtime: Concepts
Database tier
- Endpoint: concepts.db.lef (via TCP proxy)
Operational notes
Section titled “Operational notes”- Applications should connect to
concepts.db.lef:1433, not directly to the backend. - Public reachability depends on EVEO forwarding and the reverse proxy: see Firewall & public ingress and web.core.lef.
- If the app is reachable but DB connections fail, validate
concepts.db.leffirst (HAProxy + backend health).
Versions (how to check)
Section titled “Versions (how to check)”- Thinkwise version: check the Indicium container image tag / deployment config used by this environment (see Thinkwise upgrades).
- SQL Server version: run
SELECT @@VERSION;onconcepts.db.lef(VPN/LAN required).
Known risks / failure modes
Section titled “Known risks / failure modes”- Wrong reverse proxy upstream → 502/504 on the public URL.
- HAProxy/backend SQL down → app errors despite the website being “up”.
- Split-horizon DNS issues from inside VPN/LAN (see DNS split horizon).