Re: This is bad, was Re: Fedora 33 System-Wide Change proposal: systemd-resolved

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On Mo, 28.09.20 11:10, Andrew Lutomirski (luto@xxxxxxx) wrote:

> > If the other big OSes would enable DNSSEC client-side by default
> > things might change, but neither Windows nor MacOS or Android do.
> >
> >
> The old unbound-resolveconf actually worked quite well when I played with
> it.  The only problem I had was that I couldn't load google.com from one
> particular network.  Upon a bit of investigation, I discovered that the ISP
> was maliciously replacing the A records for google.com with its own servers
> to inject JavaScript.  So unbound-resolveconf's behavior was arguably
> correct.  A better solution might have been to pop up some kind of
> notification like "your network is attempting to tamper with google.com.
> You can use the tampered version of google.com at your own risk by
> following these instructions, or you could try to access the real google.com
> by doing this other thing".

That's terrible UI. The thing is: this stuff should just work and not
pester users with questions they couldn#t possibly understand or
answer properly.

I mean, let's face it. DNSSEC is great, but does it actually make your
bank transfer safer? not really, SSL certs validate domains too in a
way, so DNSSEC isn't strictly necessary because trusting a SSL CA
isn't much different than trusting the DNSSEC root.

hence: client-side DNSSEC is certainly something we should support if
we can: but it's not deployable as default as it stands now, simply
because it breaks more stuff than it helps.

Lennart

--
Lennart Poettering, Berlin
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