[PATCH] base-files: Don't enable ULA IPv6 addresses by default in new config

Fernando Frediani fhfrediani at gmail.com
Thu Sep 8 11:17:29 PDT 2022

One of the first things I do when I bring up a new OpenWrt box is to 
disable ULA to the LAN as it has not usage in most scenarios I think.
I basically use the IPv6 connectivity to receive a global prefix 
delegated from my ISP, install it on the LAN and bring global 
connectivity to devices behind it.

I hardly see scenarios where ULA are used - and I know there may be 
legitimate scenarios - but I don't think they are many that justifies to 
have ULA turned on by default.

I see no problem in turning it off and leave it as optional to be 
enabled for those cases


On 08/09/2022 14:30, Michael Richardson wrote:
>>>>>> Baptiste Jonglez <git at bitsofnetworks.org> writes:
>      > ULA IPv6 prefixes (Unique Local Addresses, RFC 4193) are not routable
>      > on the Internet.  As such, they have very limited use, and enabling
>      > them by default causes more problems than it solves:
>      > - if an OpenWrt device already has external IPv6 connectivity with
>      > globally routable addresses, then ULA addresses are not useful.
> That's just not the case.
> ULAs are intended to be the IPv6 version of RFC1918, useable for local
> communications.
> Please go read RFC7084.
> ULAs are required, and OpenWRT has been a leader here.
> I strongly object to this proposal.
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