The isolated environment monitoring system with [[:en:documentation:01_understanding:02_architecture#limited-access_networks|Sync server]] and [[:en:documentation:08_technical_reference:09_tentacle|Tentacle server]] allows to deploy monitoring in remote networks from which communication with the main Pandora FMS server is not possible. Pandora FMS's own server will start communicating with the isolated environment to recover all the monitoring information.
The main difference between the sync server and the [[https://prewebs.pandorafms.com/manual/en/documentation/05_big_environments/05_satellite|Satellite Server]] is that it is the main server that initiates communications and receives packets from the remote network. In an environment with a satellite server and/or proxy, it is the satellite/proxy that sends the data to Pandora FMS server.
Start from an environment where there is a main Pandora FMS server, where the **Sync Server**. To carry it out, modify the following parameters in the configuration file:
Where ''< ip_address_tentacle_server >'' is the IP address of the **Tentacle Server** and ''< port_number >'' is ''41121'', the number by default of the Tentacle protocol.
* Install the updated Tentacle server on the isolated network.
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* Modify the ''tentacle_serverd'' startup script (located by default at ''/etc/init.d/'' ), by adding the ''-I'' and ''-o'' parameteres to ''TENTACLE_EXT_OPS'' line, so:
* It is not necessary to indicate any IP on the Tentacle server, since the sync server initiates communications and recovers the Tentacle server files indicated on the ''sync_address'' parameter.
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* Multiple remote Tentacle servers can be configured and the sync server will communicate with all of them, provided that the IP addresses are indicated on the **sync_address** parameter, separated by commas, in example:
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* 同期サーバが通信を開始し、''sync_address'' パラメーターに示されている Tentacle サーバのファイルを取得するので、Tentacle サーバ側で何らかの IP を指定する必要はありません。
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* 複数のリモート Tentacle サーバを設定することができ、同期サーバは **sync_address** にカンマ区切りで設定された IP アドレスすべてに対して通信を行います。
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<code>
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sync_address 10.142.50.10,20.152.50.20
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</code>
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==== 全体の例 ====
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''/etc/pandora/pandora_server.conf'' 内:
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<code>
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syncserver 1
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sync_address 10.140.70.110
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sync_port 41121
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</code>
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In the Tentacle server startup script (''/etc/init.d/tentacle_serverd'' **)** identified in ''sync_address'' with ''10.140.70.110'':
There is a [[:en:documentation:08_technical_reference:09_tentacle#safe_tentacle_configuration|quick guide]] on how to set up a Tentacle server with security options.
**Sync server** communications support SSL certificate use. Several parameters must be added to the ''pandora_server.conf'' file, and in the remote Tentacle server script, the same options should be used to achieve normal SSL connection.