[dns-operations] IPv6 Connectivity on Firefox

[Jonathan Stewart]

Hi Fatemah,

If you want IPv6 at home (and you likely do if you're testing it) you can
try an IPv6 tunnel to enable IPv6 on an IPv4-only ISP service.

My favourite is the free tunnel you can get at https://tunnelbroker.net/

Hope you learn lots!

Jonathan

On Wed, Nov 25, 2015 at 4:06 AM, Fatemah Alharbi <falha008 at ucr.edu> wrote:

>
>
> Hello,
>
>
>
> I am a PhD student at UC Riverside, CA, USA. I am conducting experiments
> using Firefox to test Ipv6 connectivity and I would appreciate your
> cooperation and help to answer the following questions.
>
>
>
> *Experiment 1:*
>
> By default, Firefox has Ipv6 enabled. When I visit a particular website,
> Firefox always sends 2 DNS queries: A query(For IPv4 address) and AAAA
> query (for IPv6 address). It always prefers the IPv4 address, why?
>
>
>
> *Experiment 2:*
>
> Please see the attached file: block_A_record_google.pcapng. I blocked the
> IPv4 response packets (for the A queries) of the domain name
> clients1.google.com to see how Firefox would behave if it gets only the
> AAAA response. Even if Firefox gets a positive response for the AAAA query,
> it ignores the response and keeps asking for the Ipv4 address! Why?
>
>
>
> Does that have anything to do with my ISP Ipv6 connectivity? My ISP,
> Charter, doesn’t support Ipv6 connectivity to residential customers yet. If
> so, how Firefox does know that my ISP doesn’t support Ipv6 connectivity?
> How does Firefox know that the host triggering the DNS requests is not
> within an Ipv6 network?
>
>
>
> This is the result of the Ipv6 connectivity test on Firefox (Please see
> the attached file: Test Your Ipv6 Connectivity-Firefox.pdf):
>
>
>
>
>
> Thank you for your time. I look forward to hearing from you soon.
>
>
>
>
>
> Sincerely,
> Fatemah Alharbi
> PhD Student
> Computer Science Department
> University of California, Riverside
>
>
>
>
>
> _______________________________________________
> dns-operations mailing list
> dns-operations at lists.dns-oarc.net
> https://lists.dns-oarc.net/mailman/listinfo/dns-operations
> dns-jobs mailing list
> https://lists.dns-oarc.net/mailman/listinfo/dns-jobs
>



-- 
     Jonathan
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.dns-oarc.net/pipermail/dns-operations/attachments/20151126/9900524b/attachment.html>