# Oracle

Most connections to Orcale work out-of-the box. 

> #### ⚠️ TNS Support Availability
>
> Please note that Oracle TNS support is currently limited to specific versions of WriteBackExtreme.
>
> At this time:
>
> * TNS support is available from **version 5.7.5 and is not supported in 6.x versions.**
> * TNS support is **not yet available in version 6.x**, due to changes in the underlying database engine
>
> We are planning to support this in 6.x in a future update.

Occasionally we get questions about advanced configuration of the connection. We do support this but this requires advanced configuration on our side as-well.

For example, when your Oracle instance requires SSL. it will throw an error like this:

```
oci_connect(): ORA-12270: Client NOT using TCPS protocol to connect to server
```

In this case you need to create an .ora file on your system that contains the WALLET\_LOCATION to the .pem file.

## How to configure .ora configuration files:

Within the configuration file (wbe.config.toml) please add the following "tns\_admin" environment key to the section writeback-extreme.env with the value of `$ORACLE_HOME/network/admin/` (please expand ORACLE\_HOME into a absolute path). 

See example below

<pre><code>[writeback-extreme]
domain = 'localhost'
host = ':8899'

[writeback-extreme.env]
<strong>tns_admin = '/absolute/path/to/oracle/home/network/admin'
</strong></code></pre>

This exposes a TNS\_ADMIN environment variable to the background service of the application. Therefore the application/our oracle driver uses the TNS\_ADMIN to locate the '.ora' files.

### Docker

When running WriteBackExtreme in Docker, pass the variable prefixed with WBE like so:&#x20;

WBE\_TNS\_ADMIN = /absolute/path/to/oracle/home/network/admin<br>


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