Dane testing and posttls-finger ???

[John]

My resolve.conf points to google (8.8.8.8, 8.8.4.4 + their ipv6 equivalents).
I have heard rumours of problems with Google DNS, I am not sure that I 
believe them but ...
Is this their problem or mine (its mine because I have it) and what might 
be my best solution.
TIA
--
Sent from my Samsung Galaxy Tab 3


On 9 April, 2015 10:04:41 AM Viktor Dukhovni <ietf-dane at dukhovni.org> wrote:

> On Thu, Apr 09, 2015 at 08:40:27AM -0400, John Allen wrote:
>
> > When I try "posttls-finger dane.sys4.de" I get the following.  I have
> > emphasized a couple of areas in the following text that cause me some
> > concern.
> >
> > posttls-finger: Connected to dane.sys4.de[194.126.158.134]:25
>
> No TLSA records were found.  Your DNS resolver is not returning
> the "AD" bit for this domain.  Check /etc/resolv.conf.
>
> I get:
>
>     $ posttls-finger -c dane.sys4.de
>     posttls-finger: using DANE RR: _25._tcp.dane.sys4.de IN TLSA 3 0 1 
>     C8:B7:60:93:10:0F:05:3B:95:B5:12:DA:D8:B5:9B:B3:43:02:F7:6B:A8:C0:7E:D8:7F:BF:56:65:BF:05:F1:D1
>     posttls-finger: dane.sys4.de[194.126.158.134]:25: depth=0 matched end 
>     entity certificate sha256 digest 
>     C8:B7:60:93:10:0F:05:3B:95:B5:12:DA:D8:B5:9B:B3:43:02:F7:6B:A8:C0:7E:D8:7F:BF:56:65:BF:05:F1:D1
>     posttls-finger: dane.sys4.de[194.126.158.134]:25: Matched subjectAltName: 
>     dane.sys4.de
>     posttls-finger: dane.sys4.de[194.126.158.134]:25: subjectAltName: sys4.de
>     posttls-finger: dane.sys4.de[194.126.158.134]:25 CommonName dane.sys4.de
>     posttls-finger: dane.sys4.de[194.126.158.134]:25: subject_CN=dane.sys4.de, 
>     issuer_CN=StartCom Class 2 Primary Intermediate Server CA, 
>     fingerprint=41:B5:70:D5:35:68:72:B2:64:4C:5E:DE:74:52:23:E1:3B:3A:03:07, 
>     pkey_fingerprint=E5:CD:96:DD:35:8C:91:30:75:5B:D0:66:47:1D:CD:83:39:9A:D5:CC
>     posttls-finger: Verified TLS connection established to 
>     dane.sys4.de[194.126.158.134]:25: TLSv1.2 with cipher 
>     ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
>
> With the first line showing working DNSSEC resolution.
>
> > posttls-finger: Untrusted TLS connection established to 
> dane.sys4.de[194.126.158.134]:25: TLSv1.2 with cipher 
> ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
>
> As a result, authentication fails, since no CAs are trusted by
> default, and the default security level is opportunistic "dane"
> not CA-based "secure".
>
> > Certificate verification fails and I wind up with an untrusted connection.
> > Is this something I did or is there a real problem?
>
> Your server's local DNS resolver is not a DNSSEC validating resolver.
> Or perhaps is not even local.
>
> To enable outbound DANE, you need an /etc/resolv.conf with
> 127.0.0.1 as the only nameserver, and DNSSEC validation
> via the ICANN root enabled in that resolver0.
>
> --
> 	Viktor.