====== PFSense - Network - Disable IPv6 ======

If IPv6 is not needed, then optionally disable it to simplify network management.

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===== Networking =====

Navigate to **System -> Advanced -> Networking**:

  * Allow IPv6: **Not checked**.
  * Prefer IPv4 over IPv6: **Checked**.

<WRAP info>
**NOTE:**  This sets up some firewall rules behind the scenes, but it does not stop pfSense from generating IPv6 traffic.
</WRAP>


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===== DHCPv6 Relay =====

Navigate to **Services -> DHCPv6 Relay**:

In **DHCP6 Relay Configuration**:

  * Enable:  **Not Checked**.
  * Click **Save** and apply.

----

===== Interfaces =====

Disable IPv6 on each of the interfaces:

==== WAN ====

Navigate to **Interfaces -> WAN (pppoe0)**.

In **General Configuration**:

  * IPv6 Configuration Type: **None**.


==== LAN ====

Navigate to **Interfaces -> LAN (em1)**.

In **General Configuration**:

  * IPv6 Configuration Type: **None**.


==== OTHER INTERFACES ====

  * Repeat above instructions for all other interfaces that this applies to.

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===== Gateways =====

Navigate to **System -> Routing -> Gateways**.

In **Default Gateway**:

  * Default gateway IPv6: **None**.
  * Click **Save** and apply.

----

===== Firewall Rules =====

Firewall rules to block IPv6.

<WRAP info>
**NOTE:**  This is not necessarily needed, but a precaution if something is not working or gets misconfigured.
</WRAP>

Navigate to **Firewall -> Rules -> LAN**.

    * Default allow LAN IPv6 to any rule: **Disable**. 

<WRAP info>
**NOTE:**  Do not delete the IPv6 rule, as this may be wanted later, and easier then to just enable.
</WRAP>