VerifyHostKeyDNS, was Re: Subject: IMPORTANT: Mandatory password and ssh key change by 2011-11-30

Tomas Mraz tmraz at
Thu Oct 13 08:51:13 UTC 2011

On Thu, 2011-10-13 at 10:29 +0200, Benny Amorsen wrote: 
> Tomas Mraz <tmraz at> writes:
> > And if this malicious DNS administrator controls the caching
> > nameserver you're using for DNS queries, he can present you ANY data
> > even 'valid' fake DNSSEC data.
> This is not generally true. Resolver libraries can (and should, IMHO)
> verify DNSSEC themselves. Otherwise DNSSEC is somewhat pointless,
> because it is precisely when you are stuck behind an untrusted Wifi
> gateway that you need DNSSEC the most.
Yes, they can and should. But they don't.

Tomas Mraz
No matter how far down the wrong road you've gone, turn back.
                                              Turkish proverb

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