# Connecting CAS client

## Introduction

The CAS protocol is a simple and powerful ticket-based protocol. It involves one or many clients and one server. Clients are embedded in CASified applications (called “CAS services”) whereas the CAS server is a standalone component.

## Register CAS client

<span style="color: #a6d100; font-weight: bold; font-size: 18px;">1.</span> Open the **Identity &amp; Service Provider** page.

`<span class="link" id="bkmrk-main-menu">Main Menu</span><span id="bkmrk-%C2%A0%3E%C2%A0"> > </span><span class="link" id="bkmrk-administration">Administration</span><span id="bkmrk-%C2%A0%3E%C2%A0-0"> > </span><span class="link" id="bkmrk-configure-soffid">Configure Soffid</span><span id="bkmrk-%C2%A0%3E%C2%A0-1"> > </span><span class="link" id="bkmrk-web-sso">Web SSO</span><span id="bkmrk-%C2%A0%3E%C2%A0-2"> > </span><span id="bkmrk-identity-%26-service-p">Identity & Service providers</span>`

<span style="color: #a6d100; font-weight: bold; font-size: 18px;">2.</span> To add a new service provider, click on the **Add Service Provider** button.

<p class="callout info">Be in mind that you can configure more than one Entity Group and you could add new service providers in each one.</p>

<span style="color: #a6d100; font-weight: bold; font-size: 18px;">3.</span> Then you must fill in the required fields. Also, you need to provide the identity provider metadata. You can either copy it from the Soffid federation page or instruct the service provider to download the federation metadata by itself.

## [![image-1661408241083.png](https://bookstack.soffid.com/uploads/images/gallery/2022-08/scaled-1680-/image-1661408241083.png)](https://bookstack.soffid.com/uploads/images/gallery/2022-08/image-1661408241083.png)

<p class="callout info">For more information about the attributes, you can visit [the CAS client detailed info](https://bookstack.soffid.com/link/392#bkmrk-cas-client).</p>