...MYSQLIP -u MYSQLUSER -pPASSWORD -e 'select id_sensor,host from voipmonitor.sensors\G'",$out,$rc);
$sensors=array();
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...oring) | Central server | Central server processes raw packets from remote sensors
;1. Check the <code>packetbuffer_sender</code> setting on your remote sensors:
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* Sensor version shown in Settings > Sensors meets the requirement
* One or more sensors configured with IP address <code>127.0.0.1</code>
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=== B. Monitoring Hardware Health (Sensors Plugin) ===
...nsors` plugin reads temperature, voltage, and fan speed data from hardware sensors on your server's motherboard and CPU.
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...gs->sensors that the client with its id_sensor were autoadded into list of sensors.
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...calls and send only CDRs (metadata). Good for low bandwidth. PCAPs stay on sensors.
** '''Packet Mirroring''' (`packetbuffer_sender=yes`): Remote sensors send raw packets to central server. Central server does all processing. Goo
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# Navigate to '''Settings → Sensors'''
When upgrading many sensors simultaneously, you may encounter '''429 Too Many Requests''' errors from <
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...covers backing up and restoring VoIPmonitor GUI configuration data (users, sensors, alerts, dashboards). It does '''not''' cover CDR/PCAP data backup.
* '''Configuration Tables:''' Users, sensors, capture rules, alerts, dashboards, reports
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* '''Prevent CDR merging from multiple sensors in packet mirroring mode''' (see below)
When multiple sensors send packets to a '''single receiver instance''' in packet mirroring mode (
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* '''Sensor upgrades''' via Settings > Sensors
Restrict users to specific sensors:
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...oring) | Central server | Central server processes raw packets from remote sensors
;1. Check the <code>packetbuffer_sender</code> setting on your remote sensors:
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A[GUI Slow / OOM Errors] --> B{Check RRD Charts<br/>Settings → Sensors → 📊}
# Navigate to '''Settings → Sensors'''
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...eb GUI. The GUI is a PHP web application for viewing CDR data and managing sensors.
=== Add Sensors (Multi-Sensor Setup) ===
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..., additional steps are required to enable millisecond precision across all sensors.
:In the GUI, navigate to '''Settings -> Sensors''' and check that the uptime for each sensor reflects the recent restart.
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I --> J["Step 2: ipv6=yes on sensors"]
J --> K["Step 3: Restart sensors"]
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The '''SQLq/SQLf''' values in '''Settings → Sensors → Status''' show the queue size before CDRs are pushed to database.
...setup to '''single sensor''' writing to database. Do not use with multiple sensors.}}
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* '''Filter by sensor''' - If multiple sensors capture the same mirrored traffic
'''Enable via GUI:''' Settings > Sensors > wrench icon > enable <code>active_call_info</code>
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This guide covers deploying multiple VoIPmonitor sensors in a distributed architecture using Client-Server mode (v20+).
For deployment options including on-host vs dedicated sensors and traffic forwarding methods (SPAN, GRE, TZSP, VXLAN), see [[Sniffing_mod
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= Sensors =
...mote database || Database connection for "Legs by CID/header" lookups when sensors use different databases
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=== Sensors Alerts ===
# Database overload → Check SQLq in '''GUI > Settings > Sensors''', see [[Scaling]]
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