# WHATPORT(3301)

## NAME

port 3301 — Tarantool — Tarantool's default binary (iproto) port — an in-memory database with a Lua application server attached.

Protocol: TCP  
IANA registry

## DESCRIPTION

IANA registers 3301 to Tarantool, and it is the default listen port for the server's binary iproto protocol, used by every client driver and by replication between instances. Tarantool is an in-memory data store that also runs arbitrary Lua stored procedures, so a connection here reaches both the data and a code-execution surface. Default configurations have historically allowed a `guest` user, which is why IANA's own entry flags known unauthorized use of the port.

## EXPOSURE

**Do not expose.** A database that executes Lua for its clients must not be internet-facing: bind it to a private interface, disable guest access, and reach it over a VPN or SSH tunnel.

## CHECK

```sh
nc -v TARGET 3301   # Tarantool answers with a 128-byte greeting
```

## SEE ALSO

- source — [Tarantool source repository](https://github.com/tarantool/tarantool) (github.com)
- iana — [IANA Service Name and Transport Protocol Port Number Registry](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml) (iana.org)

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HTML: <https://whatport.net/3301/> · JSON: <https://whatport.net/3301.json> · full dataset: <https://whatport.net/ports.json>