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Bug #16704

closed

OpenVPN IPV6 "track interface" option does not work

Added by Satrajit Das 7 days ago. Updated 6 days ago.

Status:
Rejected
Priority:
Normal
Assignee:
-
Category:
OpenVPN
Target version:
-
Start date:
Due date:
% Done:

0%

Estimated time:
Release Notes:
Default
Affected Plus Version:
25.11.1
Affected Architecture:
6100

Description

I am on pfSense plus 25.11.1 on a 6100 max. My ISP provides a /56 DHCPv6 prefix delegation (see screenshot). I use "track interface" for IPv6 on my LAN interfaces and all IPv6 connections/address assignments are working as expected.

However, when setting up OpenVPN, when I choose the "track interface" option and specify an IPv6 prefix id (see screenshot), the resulting IPv6 server definition is not correctly updated in the OpenVPN config file (see screenshot).

Please also note the end blank on the "(hexadecimal from 0 to )" on the OpenVPN prefix id settings verbiage. So it appears the IPv6 "track interface" option is not working for OpenVPN.

Files

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Prefix delegation from ISP.jpg (219 KB) Prefix delegation from ISP.jpg Prefix delegation from ISP Satrajit Das, 02/16/2026 10:47 PM
OpenVPN prefix id.jpg (217 KB) OpenVPN prefix id.jpg OpenVPN prefix id Satrajit Das, 02/16/2026 10:48 PM
OpenVPN config file.jpg (41.6 KB) OpenVPN config file.jpg OpenVPN config file Satrajit Das, 02/16/2026 10:48 PM
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 #1

Updated by Satrajit Das 7 days ago

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 #2

Updated by Marcos M 6 days ago

  • Status changed from New to Rejected

The option only supports WANs configured as 6rd Tunnel - not DHCPv6. This is because the current implementation of the feature requires that the prefix is known at the time that the OpenVPN server configuration is generated. See https://redmine.pfsense.org/issues/16706

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