# System Services

*Tools → System Services* shows the background services of SAS Radius. Each row shows whether the service is **RUNNING** (green) or **STOPPED** (red), updated every 5 seconds, with **START**, **STOP** and **RESTART** buttons.

[![system services](https://help.snono-systems.com/uploads/images/gallery/2026-11/scaled-1680-/system-services-clean.png)](https://help.snono-systems.com/uploads/images/gallery/2026-11/system-services-clean.png)

<p class="callout danger">The buttons act immediately, without confirmation. Stopping **FreeRadius** stops all user logins.</p>

## Services

<table id="bkmrk-servicedoesif-stoppe"><thead><tr><th>Service</th><th>Does</th><th>If stopped</th></tr></thead><tbody><tr><td>FreeRadius</td><td>RADIUS server</td><td>No user can log in; accounting stops.</td></tr><tr><td>SAS Poller</td><td>Closes idle sessions and finds expired / over-quota users</td><td>Old sessions stay online, expired users are not disconnected.</td></tr><tr><td>Users Disconnect Daemon</td><td>Sends disconnect requests to routers</td><td>Disconnects (manual and automatic) are not sent.</td></tr><tr><td>Traffic Monitor</td><td>Calculates daily user traffic</td><td>Traffic reports and quotas are not updated.</td></tr><tr><td>Policy Manager</td><td>Applies time / traffic based policies</td><td>Daily policies are not applied.</td></tr><tr><td>Cards Generator, Cards Series Number Generator</td><td>Generate cards</td><td>Card jobs stay pending.</td></tr><tr><td>SMS Service</td><td>Sends SMS</td><td>SMS stay in the queue.</td></tr><tr><td>Mail Poller</td><td>Sends emails</td><td>Emails stay in the queue.</td></tr><tr><td>Crontab Service</td><td>Runs scheduled jobs</td><td>Scheduled tasks don't run.</td></tr><tr><td>Radius Log Monitor</td><td>Streams the RADIUS log</td><td>The live RADIUS Log page stays empty.</td></tr><tr><td>User Live Traffic</td><td>Live traffic graphs (SNMP)</td><td>Live Traffic doesn't work.</td></tr><tr><td>Webhook Dispatcher</td><td>Sends webhooks (Settings → Advanced)</td><td>Webhooks are not sent.</td></tr><tr><td>Firebase Dispatcher</td><td>Sends mobile app notifications</td><td>App notifications are not delivered.</td></tr><tr><td>System Manager, Update Manager</td><td>System components and updates</td><td>–</td></tr></tbody></table>

If a service keeps stopping, restart it once and check the related page; if it stops again, contact Snono support.

## Remote Access Tunnel

The first row, **Remote Access Tunnel**, lets Snono support reach your server when it is behind a firewall or NAT. Click **Connect** when support asks for it; the status changes to **ONLINE** and the access addresses are shown. Click **Disconnect** when support has finished.

*Required permission: the System Services permission (system administrators)*