The good news is that I reported this particular site as a problem two and three years ago, both, and it isn't any worse. Matthew Kaufman On Wed, Nov 16, 2016 at 6:29 PM Mark Andrews <marka@isc.org> wrote:
In message <CC8936B2-1396-4375-85AA-A0247FD78012@consulintel.es>, JORDI PALET M ARTINEZ writes:
I think it is not just a matter of testing behind a 1280 MTU, but about makin g sure that PMTUD is not broken, so it just works in any circumstances.
Regards, Jordi
If you don't do MSS fix up a 1280 link in the middle will find PMTUD issues provided the testing host has a MTU > 1280.
Mark
-----Mensaje original----- De: NANOG <nanog-bounces@nanog.org> en nombre de Mark Andrews < marka@isc.org> Responder a: <marka@isc.org> Fecha: jueves, 17 de noviembre de 2016, 9:26 Para: Lee <ler762@gmail.com> CC: <nanog@nanog.org> Asunto: Re: pay.gov and IPv6
In message <CAD8GWsvetSmn1ssFk_AdTtKheog0e1ZfXRLd11FpkbPJGHM6hw@mail.gmai l.com> , Lee writes: > On 11/16/16, Mark Andrews <marka@isc.org> wrote: > > > > In message <1479249003.3937.6.camel@ns.five-ten-sg.com>, Carl Byingto n > > writes > > : > >> -----BEGIN PGP SIGNED MESSAGE----- > >> Hash: SHA512 > >> > >> Following up on a two year old thread, one of my clients just hit th is > >> problem. The failure is not that www.pay.gov is not reachable over i pv6 > >> (2605:3100:fffd:100::15). They accept (TCP handshake) the port 443 > >> connection, but the connection then hangs waiting for the TLS handsh ake. > >> > >> openssl s_client -connect www.pay.gov:443 > >> > >> openssl s_client -servername www.pay.gov -connect 199.169.192.21:443 > >> > >> Browsers (at least firefox) see that as a very slow site, and it doe s > >> not trigger their happy eyeballs fast failover to ipv4. > > > > Happy eyeballs is about making the connection not whether TCP > > connections work after the initial packet exchange. > > > > I would send a physical letter to the relevent Inspector General > > requesting that they ensure all web sites under their juristiction > > that are supposed to be reachable from the public net get audited > > regularly to ensure that IPv6 connections work from public IP space. > > That will absolutely work. > > NIST is still monitoring ipv6 .gov sites > https://usgv6-deploymon.antd.nist.gov/cgi-bin/generate-gov
Which show green which means that the tests they are doing are not sufficient. They need to test from behind a 1280 mtu link.
The DNSSEC testing is also insufficient. 9-11commission.gov shows green for example but if you use DNS COOKIES (which BIND 9.10.4 and BIND 9.11.0 do) then servers barf and return BADVERS and validation fails. QWEST you have been informed of this already.
Why the hell should validating resolver have to work around the crap you guys are using? DO YOUR JOBS which is to use RFC COMPLIANT servers. You get PAID to do DNS because people think you are compentent to do the job. Evidence shows otherwise.
https://ednscomp.isc.org/compliance/gov-full-report.html show the broken servers for .gov. It isn't hard to check.
> so the IG isn't going to do anything there & pay.gov has a contact us p age > https://pay.gov/public/home/contact > that I'd bet works much better than a letter to the IG
You have to be able to get to https://pay.gov/public/home/contact to use it. Most people don't have the skill set to force the use of IPv4.
If it is production it should work. It is the I-G's role to ensure this happens. Butts need to kicked.
Mark
> Regards, > Lee -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka@isc.org
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