Technical information
Tables of network flows
Tables of network flows to integrate monitoring platform to IT
Central server
| From | To | Protocol | Port | Application |
|---|---|---|---|---|
| Central server | NTP server | NTP | UDP 123 | Synchronization of the system clock |
| Central server | DNS server | DNS | UDP 53 | Domain name resolution |
| Central server | SMTP server | SMTP | TCP 25 | Notification via email |
| Central server | LDAP(s) server | LDAP(s) | TCP 389 (636) | Authentication to access the Centreon web interface |
| Central server | DBMS server | MySQL | TCP 3306 | Access to Centreon databases (if moved to a dedicated server) |
| Central server | HTTP Proxy | HTTP(s) | TCP 80, 8080 (443) | If your platform needs to connect to a web proxy to access the Centreon IT Edition |
| Central server | Repository | HTTP (FTP) | TCP 80 (FTP 20) | Repository for system and application packages |
Poller
| From | To | Protocol | Port | Application |
|---|---|---|---|---|
| Poller | NTP server | NTP | UDP 123 | Synchronization of the system clock |
| Poller | DNS server | DNS | UDP 53 | Domain name resolution |
| Poller | SMTP server | SMTP | TCP 25 | Notification via email |
| Poller | Repository | HTTP (FTP) | TCP 80 (FTP 20,21) | Repository for system and application packages |
Remote Server
| From | To | Protocol | Port | Application |
|---|---|---|---|---|
| Remote Server | NTP server | NTP | UDP 123 | Synchronization of the system clock |
| Remote Server | DNS server | DNS | UDP 53 | Domain name resolution |
| Remote Server | SMTP server | SMTP | TCP 25 | Notification via email |
| Remote Server | LDAP(s) server | LDAP(s) | TCP 389 (636) | Authentication to access the Centreon web interface |
| Remote Server | DBMS server | MySQL | TCP 3306 | Access to Centreon databases (if moved to a dedicated server) |
| Remote Server | Repository | HTTP (FTP) | TCP 80 (FTP 20) | Repository for system and application packages |
Other flows can be necessary for Centreon web authentication (RADIUS, etc.) or notification system defined.
Tables of platform flows
Poller
| From | To | Protocol | Port | Application |
|---|---|---|---|---|
| Central server | Poller | ZMQ | TCP 5556 | Export of Centreon configuration (depending on communication type) |
| Central server | Poller | SSH (legacy) | TCP 22 | Export of Centreon configuration (depending on communication type) |
| Poller | Central server | BBDO | TCP 5669 | Transfer of collected data |
| Poller | Central server | HTTP(S) | TCP 80 (443) | Poller registration |
Remote Server
| From | To | Protocol | Port | Application |
|---|---|---|---|---|
| Central server | Remote Server | ZMQ | TCP 5556 | Export of Centreon configuration |
| Remote Server | Central server | BBDO | TCP 5669 | Transfer of collected data |
| Remote Server | Central server | HTTP(S) | TCP 80 (443) | Remote Server registration |
| Remote Server | Poller | ZMQ | TCP 5556 | Export of Centreon configuration (depending on communication type) |
| Remote Server | Poller | SSH (legacy) | TCP 22 | Export of Centreon configuration (depending on communication type) |
| Poller | Remote Server | BBDO | TCP 5669 | Transfer of collected data |
| Poller | Remote Server | HTTP(S) | TCP 80 (443) | Poller registration |
If Remote Server is not used as proxy for a Poller, Poller network flows apply.
Monitoring
| From | To | Protocol | Port | Application |
|---|---|---|---|---|
| Poller | Network equipment, servers, etc. | SNMP | UDP 161 | Monitoring |
| Network equipment | Poller | Trap SNMP | UDP 162 | Monitoring |
| Poller | Servers | NRPE | TCP 5666 | Monitoring |
| Poller | Servers | NSClient++ | TCP 12489 | Monitoring |
If the Centreon server is a poller too, remember to open monitoring flows.
Other flows can be necessary to monitor databases, access to API, or application ports.
Users and groups
Description of software and linked users:
- Alma / RHEL / Oracle Linux 8
- Alma / RHEL / Oracle Linux 9
- Debian 11
| Software | Service | User | Comment |
|---|---|---|---|
| Apache | httpd | apache | automatic start |
| PHP-FPM | php-fpm | apache | automatic start |
| MariaDB | mariadb | mysql | automatic start |
| Centreon | centreontrapd | centreon | automatic start |
| Centreon Broker | cbwd | centreon-broker | automatic start |
| Centreon Broker | cbd | centreon-broker | automatic start |
| Centreon Engine | centengine | centreon-engine | automatic start |
| Centreon Gorgone | gorgoned | centreon-gorgone | automatic start |
| Software | Service | User | Comment |
|---|---|---|---|
| Apache | httpd | apache | automatic start |
| PHP-FPM | php-fpm | apache | automatic start |
| MariaDB | mariadb | mysql | automatic start |
| Centreon | centreontrapd | centreon | automatic start |
| Centreon Broker | cbwd | centreon-broker | automatic start |
| Centreon Broker | cbd | centreon-broker | automatic start |
| Centreon Engine | centengine | centreon-engine | automatic start |
| Centreon Gorgone | gorgoned | centreon-gorgone | automatic start |
| Software | Service | User | Comment |
|---|---|---|---|
| Apache | apache2 | www-data | automatic start |
| PHP-FPM | php-fpm | apache | automatic start |
| MariaDB | mariadb | mysql | automatic start |
| Centreon | centreontrapd | centreon | automatic start |
| Centreon Broker | cbwd | centreon-broker | automatic start |
| Centreon Broker | cbd | centreon-broker | automatic start |
| Centreon Engine | centengine | centreon-engine | automatic start |
| Centreon Gorgone | gorgoned | centreon-gorgone | automatic start |
Description of optional software and linked users:
| Software | Service | User | Comment |
|---|---|---|---|
| Centreon VMware | centreon_vmware | centreon | not installed by default |
| RRDtool | rrdcached | rrdcached | not enabled and not defined in Centreon by default |
Description of groups and linked users for Centreon Open Source and IT Edition:
| Group | Users |
|---|---|
| apache | nagios,centreon,centreon-gorgone |
| centreon | centreon-engine,centreon-broker,apache,centreon-gorgone |
| centreon-broker | centreon,nagios,centreon-engine,apache,centreon-gorgone |
| centreon-engine | centreon-broker,apache,nagios,centreon,centreon-gorgone |
| centreon-gorgone | centreon,apache,centreon-gorgone,centreon-engine,centreon-broker |
| rrdcached | centreon-broker,apache |
Description of groups and linked users for Centreon Business Edition:
| Group | Users |
|---|---|
| apache | nagios,centreonBI,centreon,centreon-gorgone |
| centreon | centreon-engine,centreon-broker,apache,rrdcached,centreonBI,centreon-gorgone |
| centreon-broker | centreon,nagios,centreon-engine,apache,rrdcached,centreon-gorgone |
| centreon-engine | centreon-broker,apache,nagios,centreon,centreon-gorgone |
| centreon-gorgone | centreon,apache,centreon-gorgone,centreon-engine,centreon-broker |
| centreonBI | apache |
| centreon-map | |
| mysql | centreonBI |
Description of users, umask and home directory for Centreon Open Source and IT Edition:
| User | umask | home | Shell |
|---|---|---|---|
| root | 0022 | /root | /bin/bash |
| apache | 0022 | /var/www | /sbin/nologin |
| centreon | 0002 | /var/spool/centreon | /bin/bash |
| centreon-broker | 0002 | /var/lib/centreon-broker | /bin/bash |
| centreon-engine | 0002 | /var/lib/centreon-engine | /bin/bash |
| centreon-gorgone | 0002 | /var/lib/centreon-gorgone | /bin/bash |
| mysql | 0002 | /var/lib/mysql | /sbin/nologin |
| rrdcached | 0002 | /var/rrdtool/rrdcached | /bin/bash |
Description of users, umask and home directory for Centreon Business Edition:
| User | umask | home | Shell |
|---|---|---|---|
| root | 0022 | /root | /bin/bash |
| apache | 0022 | /var/www | /sbin/nologin |
| centreon | 0002 | /var/spool/centreon | /bin/bash |
| centreonBI | 0002 | /home/centreonBI | /bin/bash |
| centreon-agent | 0002 | /var/lib/centreon-agent | /bin/bash |
| centreon-broker | 0002 | /var/lib/centreon-broker | /bin/bash |
| centreon-engine | 0002 | /var/lib/centreon-engine | /bin/bash |
| centreon-gorgone | 0002 | /var/lib/centreon-gorgone | /bin/bash |
| centreon-map | 0002 | /home/centreon-map | /bin/bash |
| mysql | 0002 | /var/lib/mysql | /sbin/nologin |
| rrdcached | 0002 | /var/rrdtool/rrdcached | /bin/bash |
Software dependencies
For your information, the following table describes the software dependencies. Everything comes prepackaged with Centreon; you do not need to install anything manually.
| Software | Version |
|---|---|
| Apache | 2.4 |
| GnuTLS | >= 2.0 |
| Net-SNMP | 5.7 |
| openssl | >= 1.0.1k |
| PHP | 8.1 |
| RRDtools | 1.4.7 |
| zlib | 1.2.3 |
Architectures
Standalone central server
If you are not monitoring many hosts, you may only need one central server.
Components
The following components are used in a central server:
- Apache web server for the Centreon web interface
- MariaDB databases to store Centreon configuration parameters as well as monitoring and performance data
- A monitoring engine to collect data
- Collected data are sent to Centreon Broker SQL using cbmod by the monitoring engine
- Centreon Broker SQL stores information in MariaDB databases and forwards them to Centreon Broker RRD
- Centreon Broker RRD generates and updates RRD files with data in order to display performance graphs
Architecture
The diagram below summarizes how a central server works:
Distributed architecture
Description (Distributed)
The distributed architecture has the following elements:
- A central Centreon server to display information
- One or more remote servers and/or pollers to collect data
The central Centreon server includes the following items:
- Centreon web interface
- Databases (MariaDB + RRD)
- Monitoring Engine
- Broker
The Poller includes the following items:
- Monitoring Engine
- Broker module to forward collected data to a central broker
This architecture is used for:
- Enabling load balancing across multiple remote monitoring servers
- Network stream isolation: if your monitoring architecture has to monitor a DMZ area, it is easier (and safe) to place a remote server in the DMZ network
Components
Central Centreon server
Many components are used to build a central Centreon server:
- Apache web server for Centreon web interface
- MariaDB databases to store Centreon configuration parameters as well as monitoring and performance data
- The Centreon Gorgone process is used to send the monitoring configuration to the remote server and to manage it
- A monitoring engine to collect data
- Collected data are sent to Centreon Broker SQL using cbmod by the monitoring engine
- Centreon Broker SQL stores information in MariaDB databases and forwards them to Centreon Broker RRD
- Centreon Broker RRD generates and updates RRD files with data in order to display performance graphs
Poller
Many components are used to build a poller:
- A monitoring engine to collect data
- Collected data are sent to Centreon Broker SQL using cbmod by the monitoring engine
Architecture
The diagram below summarizes the architecture:
Remote DBMS
The distributed architecture with remote DBMS includes three types of entities:
- A central Centreon server to display information
- A DBMS server to store collected data
- One or more remote servers to collect data
The central Centreon server includes the following items:
- Centreon web interface
- Monitoring Engine
- Broker
- RRD files
The DBMS server stores information in MariaDB databases.
The poller includes the following items:
- Monitoring Engine
- Broker module to forward collected data to a central broker
This architecture is used for:
- Enabling load balancing across multiple remote monitoring servers
- Network stream isolation: if your monitoring architecture has to monitor a DMZ area, it is easier (and safe) to place a remote server in the DMZ network
- Providing a remote DBMS
Components
DBMS server
The DBMS server is used only to store Centreon configuration parameters as well as monitoring and performance data in MariaDB databases
Central Centreon server
Many components are used to build a central Centreon server:
- Apache web server for Centreon web interface
- The central Centreon server obtains configuration and collected data from the DBMS server
- The Centreon Gorgone process is used to send the monitoring configuration to the remote server and to manage it
- A monitoring engine to collect data
- Collected data are sent to Centreon Broker SQL using cbmod by the monitoring engine
- Centreon Broker SQL stores information in MariaDB databases and forwards them to Centreon Broker RRD
- Centreon Broker RRD generates and updates RRD files with data in order to display performance graphs
Poller
Many components are used to build a poller:
- A monitoring engine to collect data
- Collected data are sent to Centreon Broker SQL by the monitoring engine, using cbmod
Architecture
The diagram below summarizes the architecture:
Remote Server
The distributed architecture with Remote server includes three types of entities:
- A Centreon Central server to configure monitoring and to display and operate on collected data
- One or more Centreon Remote servers to display and operate on a subset of collected data
- One or more pollers to collect data
The central Centreon server includes the following items:
- Centreon web interface (configure, display and operate)
- Monitoring Engine
- Broker
- Databases (MariaDB + RRD)
The Remote servers include the following items:
- Centreon web interface (display & operate a subset of data)
- Monitoring Engine
- Databases (MariaDB + RRD)
- Broker module to forward collected data to a central broker
This architecture is used for:
- Enabling load balancing across multiple remote monitoring servers
- Network stream isolation: if your monitoring architecture has to monitor a DMZ area, it is easier (and safe) to place a remote server in the DMZ network
- Having a dedicated web interface to display and operate on a subset of data.
Components
Central Centreon server
Many components are used to build a Centreon server:
- Apache web server for Centreon web interface
- MariaDB databases to store Centreon configuration parameters as well as monitoring and performance data
- The Centreon Gorgone process is used to send the monitoring configuration to the remote server and to manage it
- A monitoring engine to collect data
- Collected data are sent to Centreon Broker SQL using cbmod by the monitoring engine
- Centreon Broker SQL stores information in MariaDB databases and forwards them to Centreon Broker RRD
- Centreon Broker RRD generates and updates RRD files with data in order to display performance graphs
Remote monitoring server
Many components are used to build a remote server:
- Apache web server for Centreon web interface
- MariaDB databases to store monitoring and performance data
- The Centreon Gorgone process is used to operate on collected data
- A monitoring engine to collect data
- Collected data are sent to Centreon Broker SQL using cbmod by the monitoring engine
- Centreon Broker SQL stores information in MariaDB databases and forwards them to Centreon Broker RRD locally. All information is forwarded to the Centreon central server.
- Centreon Broker RRD generates and updates RRD files with data in order to display performance graphs
Poller
Many components are used to build a poller:
- A monitoring engine to collect data
- Collected data are sent to Centreon Broker SQL by the monitoring engine, using cbmod
Architecture
The diagram below summarizes the architecture:
