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126 lines
4.9 KiB
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126 lines
4.9 KiB
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============================
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Configure IPv6 Tunnel Broker
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============================
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**Original Author:** Shawn Webb
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------------
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Introduction
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------------
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OPNsense supports native IPv6 as well as tunneled IPv6. This article shows how
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to set up TunnelBroker, Hurricane Electric's IPv6-in-IPv4 tunnel, with OPNsense.
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If you're based in the US and you use Netflix, you might not want to follow these
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instructions. Netflix now blocks TunnelBroker.
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If you use IRC or need access to SMTP over the TunnelBroker connection,
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Hurricane Electric requires you to go through their free IPv6 certification process.
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Their "sage" level is the highest level and will allow you to enable IRC and SMTP.
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Note that your OPNsense firewall must be directly connected to the Internet.
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Being behind a NAT will not work.
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The rest of this article assumes you already have a TunnelBroker account. If not,
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sign up and go through the free IPv6 certification process. Screenshots are provided
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throughout this article.
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----------
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Background
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----------
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Enable ICMP on the WAN side of your OPNsense firewall. TunnelBroker's UI will
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tell you an IP to use when you're setting up your tunnel on their end.
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Now add a tunnel. Make sure to add a routed /48 as we will need that to dish out
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individual /64 slices to each network. Once configured, your tunnel settings
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should look like this:
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.. image:: images/tunnelbroker_setup.png
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:width: 100%
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-----------------------
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Step 1 - Add GIF tunnel
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-----------------------
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To configure OPNsense start with adding a new gif interface.
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Go to :menuselection:`Interfaces --> Other Types --> GIF` and click on **Add** in the upper tight corner
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of the form.
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Use the following settings and copy in the IPv4&6 addresses from your TunnelBroker's UI.
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============================== ============================
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**Parent interface** *WAN*
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**GIF remote address** *Server IPv4 Address*
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**GIF tunnel local address** *Client IPv6 Address*
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**GIF tunnel remote address** *Server IPv6 Address/64*
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**Route caching** *disabled*
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**ECN friendly behavior** *disabled*
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**Description** *Tunnel Broker*
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============================== ============================
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.. image:: images/opnsense_add_gif.png
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:width: 100%
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----------------------------------------------------
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Step 2 - Configure the GIF tunnel as a new interface
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----------------------------------------------------
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The newly created GIF tunnel must now be assigned as a new interface.
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Go to :menuselection:`Interfaces --> Assignments`, select the GIF tunnel for **New interface**
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and click the **+** sign next to it.
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Then under :menuselection:`Interfaces -> [OPTX]` check **Enable Interface** and change the
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description to e.g. TUNNELBROKER before hitting **Save**.
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The newly created interface must now be set as the default IPv6 gateway
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under :menuselection:`System --> Gateways --> Single` by editing the new gateway entry
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TUNNELBROKER_TUNNELV6 and checking **Default Gateway** before saving.
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-----------------------------
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Step 3 - Basic Firewall Rules
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-----------------------------
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Now add basic firewall rules. Since I have a LAN network and a WLAN network, I
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allow WLAN to initiate connections to LAN, but not the other way around. I only
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have servers on LAN whereas most of my clients are on WLAN (Wireless LAN).
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I block all incoming to LAN and WLAN. Of course, outbound connections are fine.
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.. image:: images/tunnelbroker_fw_rules.png
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:width: 100%
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--------------------------------
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Step 4 - Configure LAN interface
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--------------------------------
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Now configure your LAN interface. The static IPv6 address we'll give it is a
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**/64** address from your assigned **/48**. I won't show the WLAN settings simply
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because it's the very same. You'll repeat the same process for further networks,
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but assigning the next interface a separate **/64** address.
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.. image:: images/tunnelbroker_configure_lan.png
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:width: 100%
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-------------------------------
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Step 5 - Configure DHCPv6 SLAAC
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-------------------------------
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We'll next configure OPNsense for Stateless Address Auto Configuration (SLAAC).
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We're going to set up the DHCPv6 service. Go to :menuselection:`Services --> DHCPv6 --> Server`.
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Simply choose a range for clients to use. Save your settings. Next go to the
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Router Advertisements sub tab on that same page. Set the **Router Advertisements**
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setting to *Assisted* and the **Router Priority** setting to *Normal*.
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.. image:: images/tunnelbroker_dhcpv6.png
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:width: 100%
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Save your settings.
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--------------------------------
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Step 6 - Test your Configuration
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--------------------------------
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You should now be set up for IPv6. To test your configuration, bring online an
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IPv6 machine, use your favorite tool to determine you have an IPv6 address. If
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you're using SLAAC, it may take up to 30 seconds or more to get an IPv6 address.
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If you see that your interface has an IPv6 address, you can try going to an
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IPv6 only test site, such as http://6.ifconfig.pro/
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