> ## Documentation Index
> Fetch the complete documentation index at: https://docs.centipidbilling.com/llms.txt
> Use this file to discover all available pages before exploring further.

# PPPoE and Hotspot

> Choose and operate the correct subscriber access model.

# Understand access services

Centipid Billing manages PPPoE and Hotspot access through packages, subscribers, NAS configuration, RADIUS authentication/accounting, and service-specific settings.

## PPPoE

Use PPPoE for fixed-line subscriber sessions authenticated with a username/password. Typical controls include:

* PPPoE-compatible packages and credentials;
* expiry and account status;
* speed/data/FUP policy;
* pre-expiry reminders;
* automatic invoicing and invoice prefix;
* active-session disconnect/pause/block actions;
* NAS/service assignment and monitoring.

PPPoE troubleshooting should compare subscriber state, package, RADIUS session/accounting, router service, transport, and local CPE configuration.

## Hotspot

Use Hotspot for captive-portal access, package purchase, vouchers, trials, receipt/credential login, and device policy. Typical controls include:

* Hotspot-compatible packages and portal visibility;
* captive theme, branding, terms, purchase instructions, and redirect;
* device limit and anti-sharing;
* vouchers and voucher agents;
* manual or online payment flows;
* session resume and disconnect-until-purchase;
* bindings for bypass/reserved-IP devices.

## Binding

Binding is presented as a subscriber type but uses the Hotspot network path. It requires a router, MAC/device, and reserved IP. See [IP and MAC bindings](/subscribers/ip-bindings).

## Enable services on a router

During provisioning, select the intended services and ports. On an existing router, the detail page shows configured PPPoE/Hotspot state and exposes supported service toggles. Disabling Hotspot or changing bridge ports is high impact; inspect active sessions and schedule the change.

## Choose the right model

| Requirement                        | Usually choose                                         |
| ---------------------------------- | ------------------------------------------------------ |
| Fixed-line home/business login     | PPPoE                                                  |
| Public Wi-Fi with package purchase | Hotspot                                                |
| Voucher access                     | Hotspot                                                |
| Device bypass with reserved IP     | Binding                                                |
| Customer portal account management | Either subscriber type, subject to configured features |

Do not change an existing subscriber's type only to work around a package or router problem. Type conversion can alter credentials, package compatibility, and network policy; validate the desired migration first.