---

labels:

- Stage-Beta

summary: "Fast Authentication Streamlining Tokens"

rockspec:

  dependencies:

  - mod_sasl2

---

This module implements a mechanism via which clients can exchange a password

for a secure token, improving security and streamlining future reconnections.

At the time of writing, the XEP that describes the FAST protocol is still

working its way through the XSF standards process. You can [view the FAST XEP

proposal here](https://xmpp.org/extensions/inbox/xep-fast.html).

This module depends on [mod_sasl2].

## Configuration

| Name                      | Description                                            | Default               |

|---------------------------|--------------------------------------------------------|-----------------------|

| sasl2_fast_token_ttl      | Default token expiry (seconds)                         | `86400*21` (21 days)  |

| sasl2_fast_token_min_ttl  | Time before tokens are eligible for rotation (seconds) | `86400` (1 day)       |

The `sasl2_fast_token_ttl` option determines the length of time a client can

remain disconnected before being "logged out" and needing to authenticate with

a password. Clients must perform at least one FAST authentication within this

period to remain active.

The `sasl2_fast_token_min_ttl` option defines how long before a token will be

rotated by the server. By default a token is rotated if it is older than 24

hours. This value should be less than `sasl2_fast_token_ttl` to prevent

clients being logged out unexpectedly.