[FS#710] Firewall gives warning msgs when kmod-ipt-nat6 is installed

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - Luiz Angelo Daros de Luca (luizluca) 

Attached to Project - LEDE Project
Summary - Firewall gives warning msgs when kmod-ipt-nat6 is installed
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - lede-17.01
Due in Version - Undecided
Due Date - Undecided
Details - After I installed kmod-ipt-nat6, firewall gives me these messages on every restart:

 * Populating IPv6 nat table
   * Zone 'lan'
Warning: fw3_ipt_rule_append(): Can't find target 'prerouting_lan_rule'
Warning: fw3_ipt_rule_append(): Can't find target 'postrouting_lan_rule'
   * Zone 'wan'
Warning: fw3_ipt_rule_append(): Can't find target 'prerouting_wan_rule'
Warning: fw3_ipt_rule_append(): Can't find target 'postrouting_wan_rule'
   * Zone 'guest'
Warning: fw3_ipt_rule_append(): Can't find target 'prerouting_guest_rule'
Warning: fw3_ipt_rule_append(): Can't find target 'postrouting_guest_rule'
Warning: fw3_ipt_rule_append(): Can't find target 'prerouting_rule'
Warning: fw3_ipt_rule_append(): Can't find target 'postrouting_rule'

It looks like fw3 is trying to do something with IPv6 NAT and failing. Maybe it should not do it
as NAT6 is just for special cases. I'm using in order to be able to connect to openvpn on the router
from a lan client.
 


More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=710