On Mon, Feb 03, 2020 at 07:58:24PM +0100, Solene Rapenne wrote:
> On Mon, Feb 03, 2020 at 07:52:29PM +0100, Florian Obser wrote:
> > On Mon, Feb 03, 2020 at 06:16:54PM +0100, Solene Rapenne wrote:
> > > I re-enabled unwind today (i was using append instead of prepend in
> > > dhclient.conf) and I got a few issues resolving domains, often the first
> > > time, if I try again I get a result. I'm pretty sure it's not a bug, but
> > > I have no idea what's happening here, so maybe log output or
> > > documentation could be enhanced.
> > > 
> > > 
> > > From /var/log/messages (192.168.1.254 is dns from my dhcp)
> > > 
> > > Feb  3 17:55:44 solene unwind[18044]: validation failure 
> > > <ocsp.int-x3.letsencrypt.org. A IN>: no signatures from 192.168.1.254 for 
> > > key org. while building chain of trust
> > > Feb  3 18:05:10 solene unwind[18044]: validation failure <google.fr. A 
> > > IN>: no DNSSEC records from 192.168.1.254 for DS google.fr. while 
> > > building chain of trust
> > > Feb  3 18:05:18 solene unwind[18044]: validation failure <google.it. A 
> > > IN>: no signatures from 192.168.1.254 for DS it. while building chain of 
> > > trust
> > > 
> > 
> > Looks like your dhcp nameserver strips DNSSEC in a weird way.
> > Can you please show
> > 
> > dig @192.168.1.254 +dnssec . SOA
> > and
> > dig @192.168.1.254 org DNSKEY
> > 
> > -- 
> > I'm not entirely sure you are real.
> > 
> 
> sure :)
> 
> solene@t480 ~ $ dig @192.168.1.254 +dnssec . SOA
> 
> ; <<>> dig 9.10.8-P1 <<>> @192.168.1.254 +dnssec . SOA
> ; (1 server found)
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 63346
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
> 
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 4096
> ;; QUESTION SECTION:
> ;.                              IN      SOA
> 
> ;; ANSWER SECTION:
> .                       84857   IN      SOA     a.root-servers.net. 
> nstld.verisign-grs.com. 2020020301 1800 900 604800 86400
> 
> ;; Query time: 25 msec
> ;; SERVER: 192.168.1.254#53(192.168.1.254)
> ;; WHEN: Mon Feb 03 19:54:35 CET 2020
> ;; MSG SIZE  rcvd: 103
> 

for the archives: 192.168.1.254 is stripping rrsigs but unwind thinks
dhcp is validating. This is wrong and we need to figure out why.

-- 
I'm not entirely sure you are real.

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