[AusNOG] IPv6

[Mark ZZZ Smith]

Deletion fail, should have been:

"As others have said, disabling IPv4 is likely to have been your problem. You might need IPv4 to perform a DNS lookup, which would return both A and AAAA records, which with IPv6 as a preference would then use the AAAA result."


----- Original Message -----
From: Mark ZZZ Smith <markzzzsmith at yahoo.com.au>
To: Noel Butler <noel.butler at ausics.net>; "ausnog at lists.ausnog.net" <ausnog at lists.ausnog.net>
Cc: 
Sent: Sunday, 29 March 2015, 12:52
Subject: Re: [AusNOG] IPv6

As others have said, disabling IPv4 is likely to have been your problem. That isn't the case. You might need IPv4 to perform a DNS lookup, which would return both A and AAAA records, which with IPv6 as a preference would then use the AAAA result. 

If you want a "IPv6 only" Internet experience, you need to also ensure that you're using IPv6 accessible DNS resolvers (i.e., IPv6 addresses in /etc/resolv.conf). Still expect some things to be broken e.g., advertisements and other external resources in an IPv6 accessible web page might still be delivered over IPv4.

There are a number of ways to verify IPv6 is being used:


- visit www.kame.net project to see the dancing turtle
- ping6 a well known IPv6 accessible website e.g., www.google.com, facebook.com
- view your established IPv6 connections using a CLI utility e.g., netstat -6, ss -t -6
- tcpdump -i <interface> ip6 


________________________________
From: Noel Butler <noel.butler at ausics.net>
To: ausnog at lists.ausnog.net 
Sent: Friday, 27 March 2015, 21:39
Subject: Re: [AusNOG] IPv6






On 27/03/2015 16:15, Karl Auer wrote:
On Fri, 2015-03-27 at 11:42 +1000, Noel Butler wrote: 
>/ Under Linux, the address selection preferences can be changed using gai.conf(5).
Indeed it can, the last time I did this - 99.9999999999999% of the sites
>>I went to, well, couldnt get to :)
>I suspect you did it wrong then...  :-)
>
>Unless you deliberately blocked IPv4 or something.
>
>Regards, K.
>
>

I suspect I did, it was the first time IIRC, that I ever bothered to play with it, so to conduct my test I recall I nuked ipv4, like I will do this weekend, so there is no way ipv4 will be used, I will also drop the ipv4 interface on my VPN in L.A, before I start my weekly  tv catchups, to see what I can access or not on ipv6 - already I know there will be no twitter, have to keep hte tablet handy for that lol :)


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