> For the complete documentation index, see [llms.txt](https://docs.vectra.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.vectra.ai/configuration/access/external-authentication-qux/tacacs-qux.md).

# TACACS+ (QUX)

Vectra Cognito's TACACS+ Authentication supports the following protocols:

* PAP
* CHAP

NOTE: ASCII, MSCHAPv1 and MSCHAPv2 authentication methods are not currently supported.

### Setup TACACS+ Profile

To configure browse to **Manage - External Authentication -** **TACACS+ Profiles - Create**

Provide the following required fields and the correct protocol.

![](/files/hGmkBtOYxvd4QLX8jVRR)

Click on **Create** and you should see a message "TACACS profile created!"

Once the Profile has been created you should assign users to this profile.

You can create new users under **Manage - Users** or use the API to migrate users to the new profile. At this time the web interface cannot be used to migrate existing users to a new authentication method without first deleting and recreating the users.

### Steps to migrate existing users to TACACS+ profile via REST API

Send a PATCH request to:

```
URL: https://<mgt_ip>/api/v2/users/<id>
Headers : "Authorization": "Token <api-key>"" "Content-Type": "application/json"
Body: {"account_type": "TACACS", "authentication_profile": "tacacs-profile"}
```

For more information regarding using the REST API go to **Resources - REST API Guide**.


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