> For the complete documentation index, see [llms.txt](https://cookbook.denovolab.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cookbook.denovolab.com/installation/distributed-architecture/web-ui.md).

# Web UI

Class4 Fusion uses NGIX as the web server.  You can have multiple web servers to load balance web UI access. 

Here is how you install the web component in each one of your web servers:

```
yum install dnlv6-webbackend.noarch dnlv6-webui.x86_64

```

The Web component consists of Vue.js Web Ui and Python API server. 

After web server is installed, you can configure the API server to connect to the database by going to the following directory:

{% hint style="info" %}
cd /opt/denovo\_v6/api\_dnl
{% endhint %}

Then, you need to edit this fiel: **api.ini**

You then change the followign line to  specify what IP or hostname to bind your API server:

{% hint style="info" %}
**api\_host = localhost**
{% endhint %}

You can specify to use HTTP or HTTPS with the following parameter:

{% hint style="info" %}
**api\_schema = http\://**
{% endhint %}

You can specify the DB access with the following parameter:

{% hint style="info" %}
**db\_conn\_string = postgresql://webbackend\@127.0.0.1:5432/class4\_dnl**
{% endhint %}