> For the complete documentation index, see [llms.txt](https://help.novacuraflow.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.novacuraflow.com/6.11/security/server/security-settings.md).

# Security settings

## Accessing server security settings

Currently, server security settings are accessed and modified through editing the **Web.config** file in the Flow Server installation directory. Any changes saved to this file will cause the Flow Server to restart automatically, ensuring that changes take effect immediately.

{% hint style="warning" %}
Always make a back-up copy of the Web.config file *outside of* the Flow Server installation directory before making any changes to the configuration.
{% endhint %}

## Limiting WAN access to studio functionality

For Flow Server installations that are available on a public IP address, it advisable to turn off access to the Flow Studio APIs. This means that only end-users will be able to connect to the Flow server using non-LAN IP addresses. For access using the Flow studio, only LAN IP addresses are allowed.

To disable WAN Access to studio functionality, navigate to the Web.config file in the Flow server installation directory, then find the configuration key marked **blockStudioIfOutsideLocalNet** and change the value to **true**.

```markup
<add key="blockStudioIfOutsideLocalNet" value="true"/>
```

It is possible to configure a set of excepted host names, which will be allowed even if WAN Access is blocked. To configure such exceptions, add the excepted host names as a comma-separated list in the **blockStudioIfOutsideLocalNetExcept** configuration key.


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