Doors

A door is a single-user game (or utility) the BBS launches as a
sub-process. Originals were DOS programs talking to the BBS via a
fake COM port; today there's a wider menagerie.

Door types ANetBBS supports

Type	What it is	Typical example
`web`	Native HTML/JS — runs in the browser, no shell-out	2048, Wordle
`door_rlogin`	Remote Synchronet game server	LORD, TradeWars on a partner BBS
`door_dos`	DOS executable via DOSBox-staging + TCP nullmodem bridge	LORD locally
`door_native`	Linux native binary speaking DOOR.SYS	various forks

Playing

Web: /games/ — game list. Pick one and play in the browser
(web games) or in a Web Terminal popup (terminal games).
Terminal: main menu — usually under a "Games" or "Doors" sub-menu.

Dropfiles

Terminal doors expect a dropfile — a text file with the user's
name, time remaining, baud rate, etc. ANetBBS writes the major
formats automatically right before launch:

DOOR.SYS — almost-universal
DORINFOx.DEF — Synchronet-flavored
EXITINFO.BBS — Renegade/Telegard

Stored in each door's working directory; cleared on launch.

Don't touch the door's working dir

ANetBBS deliberately does not sweep files inside a door's
working directory between launches. Some doors keep persistent
node-specific state in files named like NODE1.DAT that look like
lockfiles but are actually config. Sysops who run an aggressive
cleanup will break the door.

Adding a door

See Door Setup for the long version.