.. _pureos_troubleshooting_network:

Network
=======


.. _pureos_troubleshooting_network_ethernet_no_internet:

No Internet connectivity when connected to Ethernet
---------------------------------------------------

**Problem**

The system is successfully connected to a wired network, but there is no Internet connectivity.

**Cause**

The system date and time may be incorrect.

**Solution**

Manually adjust the system date and time, making sure the time zone is correct as well.


.. _pureos_troubleshooting_network_wifi_rejected:

Cannot connect to Wi-Fi
-----------------------

**Problem**

The system is unable to connect to a wireless network even though the access point details (including passphrase) are correct.

**Cause**

The system date and time may be incorrect.

**Solution**

Manually adjust the system date and time, making sure the time zone is correct as well.


.. _pureos_troubleshooting_network_no_wifi:

No internet access when connected to Wi-Fi
------------------------------------------

**Problem**

The system is successfully connected to a wireless network, but there is no Internet connectivity.
The same Wi-Fi connection is working on other devices.

**Check**

Check DNS settings.

#. Run the following command in a terminal emulator:

   .. code-block:: bash

      cat /etc/resolv.conf

**Solution**

#. Run the following command in a terminal emulator:

   .. code-block:: bash

      dpkg-reconfigure resolvconf

#. If this does not help, you can try manually adding another DNS address to the ``resolv.conf`` file.
   This may fix your connection.
   For example, you can add Google's public DNS (``8.8.8.8``) or choose a DNS from the OpenNIC DNS list `here <https://www.opennic.org>`_ (simply choose the first address).
#. Execute the following command in a terminal emulator to add this new DNS address to your ``/etc/resolv.conf`` file:

   .. code-block:: bash

      sudo sh -c 'echo "nameserver 8.8.8.8" > /etc/resolv.conf'

   The effect of this change will be visible immediately.

If you now have internet access, the problem was your DNS (or the network stack that did not update it correctly).
Make sure to update your system later!


.. _pureos_troubleshooting_network_firewall:

PureOS 10 has new firewall tools
--------------------------------

In PureOS 10, ``iptables`` was moved to ``nftables``.
``nftables`` is the preferred in kernel packet filter and ``firewalld`` is the tool for controlling firewalls on the desktop.