# Annex: The Ouinet client front-end

The Ouinet client (as run by e.g. the CENO Browser) offers a front-end page with some information and actions which may be useful for debugging the client.  Some of those may not be available from the CENO Extension.

The front-end is accessible using any plain Web browser running on the same device (you can use CENO too).  Its default address is <http://127.0.0.1:8078/>.  If you open it, you will see something like the figure below.

![Figure: The client front-end](images/front-end.png)

The items shown in the page include:

  - A link to enable the client as a certificate authority (CA) at your browser, since the client needs to intercept HTTPS traffic.

    You only need this to use a plain browser for testing the Ouinet client, in which case you will also have to configure its HTTP/HTTPS proxies to `127.0.0.1:8077`, and manually enable the [CENO Extension][] for injection to work.  We very strongly recommend using a *separate, specific browser profile* for this purpose.

    Please note that none of this needs to be done for the CENO Browser, since it is already configured like that.

  - Buttons to enable or disable the different mechanisms used by the client to access content.  They are equivalent to the check boxes in the [*CENO Settings* page](../browser/settings.md).

  - Selectors to choose different log levels, like the default `INFO` (informational messages, warnings and errors) or `DEBUG` (verbose output useful for reporting errors).

  - The public key used to verify signatures from injectors, and the configured way to reach them.  The default `bep5` method looks up Internet addresses in a BitTorrent injector swarm, as explained [here](../concepts/how.md).

  - Information on your local cache like the maximum accepted age of cached content, the approximate size of the cache, and a button to purge it completely.

[CENO Extension]: https://github.com/censorship-no/ceno-ext-settings/