We can then send a second request to the `/api/user` method which will return the details of the logged in user. We will use this request to show how Grafana automatically adds the new user we specify to the system. Here we create a new user called “anthony”.
## Making Apache’s auth work together with Grafana’s AuthProxy
I’ll demonstrate how to use Apache for authenticating users. In this example we use BasicAuth with Apache’s text file based authentication handler, i.e. htpasswd files. However, any available Apache authentication capabilities could be used.
In this example we use Apache as a reverse proxy in front of Grafana. Apache handles the Authentication of users before forwarding requests to the Grafana backend service.
* The first 4 lines of the virtualhost configuration are standard, so we won’t go into detail on what they do.
* We use a **\<proxy>** configuration block for applying our authentication rules to every proxied request. These rules include requiring basic authentication where user:password credentials are stored in the **/etc/apache2/grafana_htpasswd** file. This file can be created with the `htpasswd` command.
* The next part of the configuration is the tricky part. We use Apache’s rewrite engine to create our **X-WEBAUTH-USER header**, populated with the authenticated user.
* **RewriteRule .* - [E=PROXY_USER:%{LA-U:REMOTE_USER}, NS]**: This line is a little bit of magic. What it does, is for every request use the rewriteEngines look-ahead (LA-U) feature to determine what the REMOTE_USER variable would be set to after processing the request. Then assign the result to the variable PROXY_USER. This is necessary as the REMOTE_USER variable is not available to the RequestHeader function.
* **RequestHeader set X-WEBAUTH-USER “%{PROXY_USER}e”**: With the authenticated username now stored in the PROXY_USER variable, we create a new HTTP request header that will be sent to our backend Grafana containing the username.
* The **RequestHeader unset Authorization** removes the Authorization header from the HTTP request before it is forwarded to Grafana. This ensures that Grafana does not try to authenticate the user using these credentials (BasicAuth is a supported authentication handler in Grafana).
* The last 3 lines are then just standard reverse proxy configuration to direct all authenticated requests to our Grafana server running on port 3000.
* Create a htpasswd file. We create a new user **anthony** with the password **password**
```bash
htpasswd -bc htpasswd anthony password
```
* Launch the httpd container using our custom httpd.conf and our htpasswd file. The container will listen on port 80, and we create a link to the **grafana** container so that this container can resolve the hostname **grafana** to the grafana container’s ip address.
With our Grafana and Apache containers running, you can now connect to http://localhost/ and log in using the username/password we created in the htpasswd file.
With Team Sync, it's possible to set up synchronization between teams in your authentication provider and Grafana. You can send Grafana values as part of an HTTP header and have Grafana map them to your team structure. This allows you to put users into specific teams automatically.
To support the feature, auth proxy allows optional headers to map additional user attributes. The specific attribute to support team sync is `Groups`.
```bash
# Optionally define more headers to sync other user attributes
headers = "Groups:X-WEBAUTH-GROUPS"
```
You use the `X-WEBAUTH-GROUPS` header to send the team information for each user. Specifically, the set of Grafana's group IDs that the user belongs to.
First, we need to set up the mapping between your authentication provider and Grafana. Follow [these instructions]({{< relref "team-sync.md#enable-synchronization-for-a-team" >}}) to add groups to a team within Grafana.
Finally, whenever Grafana receives a request with a header of `X-WEBAUTH-GROUPS: lokiTeamOnExternalSystem`, the user under authentication will be placed into the specified team. Placement in multiple teams is supported by using comma-separated values e.g. `lokiTeamOnExternalSystem,CoreTeamOnExternalSystem`.
