[FS#1111] I have fresh install on WR740N and I discovered ip6tables setup is empty

[LEDE Bugs]

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

User who did this - cypa (cypa) 

Attached to Project - LEDE Project
Summary - I have fresh install on WR740N and I discovered ip6tables setup is empty
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - High
Priority - Very Low
Reported Version - lede-17.01
Due in Version - Undecided
Due Date - Undecided
Details - Supply the following if possible:
 - Device problem occurs on --- is TP-link WR740N
 - Software versions of LEDE release, packages, etc. --- base image no additional packages
 - Steps to reproduce:
   
I have fresh install on WR740N and I discovered ip6tables setup is empty ("ip6tables --list -nv" shows everything is ACCEPTed), while ink-local fe80::... address is active on wan interface and web-interface listens on it since 

$ netstat -apn
...
tcp        0      0 :::80                   :::*                   LISTEN      754/uhttpd
...

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1111