<p>You can learn more about our security assessment of this time
synchronization in our [[design documentation about non-Tor
traffic|contribute/design/Tor_enforcement#non-tor-traffic]].</p>

If Tails fails to synchronize the clock because you have to sign in to the network using a captive portal, an error screen is displayed that helps you do so.

For detailed instructions, see how to [[sign in to the network using a
captive portal|unsafe_browser]].

Then, Tails tries different ways of connecting to Tor until it succeeds:

Tails tries to connect to Tor directly using **public relays**, without using a bridge.

Tails tries to connect to Tor using one of the **default bridges**, already included in Tails, if connecting using public relays fails.

<p>Tails uses the [[default <i>obfs4</i> bridges from <i>Tor
Browser</i>|https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/blob/main/projects/tor-expert-bundle/pt_config.json?ref_type=heads]].</p>

You might need to go unnoticed if using Tor could look suspicious to someone who monitors your Internet connection.

<p>It is impossible to hide to the websites that you visit that you are using
Tor, because the <a href="https://metrics.torproject.org/exonerator.html">list
of exit nodes of the Tor network</a> is public.</p>

Our team is doing its best to help you connect to Tor using the most discreet types of Tor bridges. That is why, when you decide to hide that you are connecting to Tor:

Tails does not automatically detect whether you have to [[sign in to the network using a captive portal|unsafe_browser]].

Default bridges are not available.

To save the last Tor bridge that connected to Tor successfully, turn on the [[Tor Bridge|persistent_storage/configure#bridge]] feature of the Persistent Storage.

[[!img lib/symbolic/tor-connected.png alt="Onion icon" link="no" class="symbolic"]] You are connected to Tor.

To view the list of Tor circuits that are used by your different applications, click on the Tor status icon and choose **View Tor Circuits**. Learn more about [[managing Tor circuits|circuits]].