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IPv6 Day Has Started (sans.org)
176 points by there on June 8, 2011 | hide | past | favorite | 57 comments

BTW in case it is a non-event, you can post fun IPv6 addresses that you notice.

Here's some. Check the AAAA for:

www.facebook.com www.luns.net.uk www.cisco.com


I meant, check the literal IPv6 addresses that correspond to these hostnames. I'll put emphasis so it is more visible :)

2620:0:1c08:4000:===face:b00c===:0:1, 2a01:8900:0:1::===b00b:1e5===, 2001:420:80:1:===c:15c0:d06:f00d===


And while you're at it - maybe enable AAAA record for your site and give it a whirl! (and come up with some more creative IPv6 addresses in the process!) Thanks to guylhem for reminding about this.

sprint.net has a pretty nice one. Theirs isn't an IPv6 day exclusive either. Kind of amusing address for a telecom company...

For anyone else whose ISP doesn't support IPv6:

  PING sprint.net: 56 data bytes
  64 bytes from www.sprint.net (2600::): icmp_seq=0. time=156. ms
  64 bytes from www.sprint.net (2600::): icmp_seq=1. time=151. ms
  64 bytes from www.sprint.net (2600::): icmp_seq=2. time=153. ms
  64 bytes from www.sprint.net (2600::): icmp_seq=3. time=151. ms
  64 bytes from www.sprint.net (2600::): icmp_seq=4. time=151. ms
  ----sprint.net PING Statistics----
  5 packets transmitted, 5 packets received, 0% packet loss
  round-trip (ms)  min/avg/max/stddev = 151./152./156./2.5
2600 refers to https://secure.wikimedia.org/wikipedia/en/wiki/2600 (first two articles on the disambiguation page are relevant).

This is kind of nice pun indeed, thanks!

I use dead:beef and feed:cafe for my 2 small subnets on a /48 I got from he.net, because it's easy to remember.

Of course, if you really want to identify your allocation, setup reverse dns. To do it the easy way go to afraid.org. They offer a great free service, IMHO better than dyndns.

HE also offer a free DNS service now, considering you've already made an account with them.

Also: their DNS recursive server is whitelisted by google, so you can get YouTube videos over IPv6

I'm already using it, 2001:470:20::2 or, but I didn't know they did reverse DNS as well.

I'll think about it. For now afraid.org just works.

www.yahoo.com www.youtube.com

my site jcs.org has been dual-homed for quite a while.

Wonderful. I switched from an hetunnel to native ipv6 on my linode, and it actually reduces latency over the ipv4 connection:

    [~] 0 (jon@snowball2)
    $ ping itchy.jrock.us
    PING itchy.jrock.us ( 56(84) bytes of data.
    64 bytes from itchy.jrock.us ( icmp_req=1 ttl=49 time=59.4 ms
And then with native ipv6:

    [~] 0 (jon@snowball2)
    $ ping6 itchy.jrock.us
    PING itchy.jrock.us(2600:3c00::f03c:91ff:fe93:50b0) 56 data bytes
    64 bytes from 2600:3c00::f03c:91ff:fe93:50b0: icmp_seq=1 ttl=246 time=36.6 ms
Pretty good!

During one of the last FOSDEMs (fosdem.org) we noticed similar thing - the RTT to google.com was slightly smaller over IPv6 than IPv4.

But it's a mixed bag. All one can conclusively say that the average patient temperature in the hospital is pretty close to normal.

My web site has been open for ipv6 business for a while. At home today, I installed tunneling software on my openwrt box, and it's working with comcast. Once I found the right set of instructions it went smoothly (https://wiki.xkyle.com/Comcast_IPv6_on_Openwrt). I can see unicorns now: http://ismyipv6working.com/

Yeah, installing a tunnel went pretty smoothly, but finding the home router documentation was not that easy, this has details for O2 broadnband in UK http://blog.technologyofcontent.com/2011/05/this-blog-is-now...

Lovely - thanks for the link! added it to my mini-directory on ipv6-test.net

Akamai has some visualizations here:


Interesting how South America and Africa have absolutely zero traffic reported. I thought at least Africa, with it's shortage of IPv4 addresses, much like Asia, would have picked up on IPv6 to a larger extent than the "IPv4 wealthy" nations in the industrialized parts of the world.

Anyone have any theories? Ideas?

There's no IPv4 shortage in Africa; there might be a shortage of computers per capita but that's a different issue. http://www.potaroo.net/tools/ipv4/

99.99% of people won't have an IPv6 connection and can't be bothered to set up a tunnel. However it's still possible to play with IPv6 on your home network, and relatively simple too if you have at least one Linux box:

https://rwmj.wordpress.com/2011/06/02/ipv6-lan/ (Make sure you read the comments for clarifications and fixes)

The point of the day is to ensure that enabling AAAAs on the server side does not break the world. clientside IPv6 connectivity is a nice plus, but optional.

A couple of corrections:

1) ULAs are normally not routable over the internet. Though of course blocking them explicitly would not hurt.

2) depending on the RFC3484 configuration on the hosts, this "IPv6" might break connectivity to dualstack sites.

Please - go to tunnelbroker.net (or sixxs.net) and get yourself a tunnel - it is not that difficult, really.

You can test clients and servers on a LAN, far more simply than setting up a tunnel.

Anyway, I'm trying to get everyone to test IPv6, and believe me most people are not going to want to set up a tunnel to do this.

Edit: and the "point" of today is to test IPv6 in software. Only a tiny part is to make sure that IPv6 can be routed across the internet-at-large.

Ah, if the intent is to test the clients/server in an isolated LAN - then, yes, ULAs might work.

Though you can as well use the 2001:db8::/32 and later you can also publish your examples readily.

My comment was about any testing that involves the boxes that may want IPv4 or IPv6 connectivity to external world, apologies if I misunderstood.

The large company I work for (~5000 people worldwide) doesn't appear to support any of this. Attempting to reach ipv6day.org gives the message "No DNS records."

Sites that already had IPv4 records work.

I have fully working IPv6 connectivity (10/10 by test-ipv6.com metrics), but ipv6day.org still fails for me. It seems that the problem is that there're no A/AAAA records:

    $ host -t AAAA ipv6day.org 
    ipv6day.org has no AAAA record
    $ host -t A ipv6day.org  
    ipv6day.org has no A record
    $ host -t MX ipv6day.org 
    ipv6day.org mail is handled by 20 mail2.consulintel.es.
    ipv6day.org mail is handled by 30 dns1.consulintel.com.
    ipv6day.org mail is handled by 10 mail.consulintel.es.
    $ host -t SOA ipv6day.org 
    ipv6day.org has SOA record ns1.euro6ix.com. dnsadmin.consulintel.es. 2010120100 86400 7200 2592000 172800

try www.ipv6day.org. `ipv6day.org` doesn't even have a regular A record.

I've just gone with the common ones.

flexd@flexd.net [~]# host jacen.kly.no jacen.kly.no has IPv6 address 2001:16d8:eea2:30::dead

flexd@flexd.net [~]# host civ5.flexd.net civ5.flexd.net has address civ5.flexd.net has IPv6 address 2001:16d8:eea2:30::beef

flexd@flexd.net [~]# host caedus.kly.no caedus.kly.no has IPv6 address 2001:16d8:eea2:30::daad

IPv4 users hit a IPv4 varnish which redirects to another varnish on the proper server (woo, double). IPv6 hits the proper server varnish directly. Seems to work great from everywhere!

Would be very interesting to hear what the HN folks' experiences are with the whole v6day thing. Hopefully it should be a non-event, but interesting to know anything otherwise.

Comcast came by and ripped the cable off the pole at just about midnight exactly. I've had no internet connection since and have no idea if it'll be back on before the day is over. I'm on HN through my phone.

Coincidence I'm sure.

It's just a good opportunity to configure services and test how it works. Personally I had never touched anything ipv6 related before this spring. There was no real reason to (blame me). Now seems a good moment.

I think that's exactly the idea. If an annual nudge gets some folks to set up ipv6, then there is a steady increase in the size of the ipv6 network. For the most part, no one will have any reason to turn it off again the next day.

When can we start an annual "turn off ipv4" day? http://bgp.he.net/ipv6-progress-report.cgi suggests that we'll have to wait a while.

I think they're turning off fax and IPv4 on the same day, I read that somewhere.

I normally avoid posting jokes on HN, but this is highly relevant: http://www.thehighdefinite.com/wp-content/uploads/2010/02/20...

Ok, so I was reading about that in the FAQs, that website owners are supposed to turn off IPv6 after today in order to measure the "impact". Not sure what they mean by that.

Before IPv6 day the majors were afraid to enable v6 and accidentally break 1% of their users (somehow). Hopefully once the day is past and the world didn't end, everyone will be comfortable rolling out v6 whenever they want.

Can anyone tell me why http://ipv6day.org is failing after a lengthy timeout, but http://www.ipv6day.org works? There are links to the non-www version in this article, so I assume it worked at some point.

Edit: Actually, I think SANS just linked to the wrong site. It should be http://www.worldipv6day.org/

Facebook: 2620::1c00:0:face:b00c:0:2


Everybody notice the part:


Cool! :)

This Firefox plugin lets you see the IP you connect to which is useful to see if you get IPv6 https://addons.mozilla.org/en-US/firefox/addon/showip/?id=59...

The bbc is odd, as www.bbc.co.uk has ipv6 address 2001:4b10:bbc::2 but Firefox only connects to ipv4.. [edit] finally connected on ipv6 after a restart...

from what i remember, that add-on just tries to resolve hostnames that it sees, it doesn't actually show you whether you connected to that specific ipv4 or ipv6 address.

Netregistry.com.au also joined in on the ipv6 fun, funny their main competitor melbourneIT seems not to be interested in it.

Looks like www.rackspace.com is IPv6 now. I can't route to it since I'm on TimeWarner, but it seems to have a AAAA record.

My HE tunnel is working great! Looks like my latency to Google is the same as it is on IPv4.

Some sites that don't have AAAA DNS today:















www.tokyotosho.info 2001:67c:2a0:5:0:b00b:babe:cafe

That IPv6 address is very misleading. There was no cafe at all!

working great so far here!

www.google.com has aaaa 2a00:1450:4008:c00::69 www.youtube.com has aaaa 2a00:1450:4008:c00::be www.facebook.com has aaaa 2620::1c00:0:face:b00c:0:1 www.bcc.com has aaaa 2001:4b10:bbc::1

checked with ipv6 check @ http://www.upordown.de/www.youtube.com

Resolving AAAA records doesn't have much to do with IPv6 connectivity. The whole point today is to see what happens when clients receive AAAA records in addition to A records. If a misconfigured client thinks it can use IPv6 but can't, then the existence of that AAAA causes problems.

That's true. But i think it's real good that these big sites add aaaa records for today. Hopefully the results will show that the percentage of broken users is really small. Someone has to start deploying ipv6 - either isps or content providers.

Awesome, since Google via IPv6 is not responding for me now and has been all day.

ping me if you want any help with the debugging. I might be a bit busy but will try to help.

Either my gmail or work address could work as XMPP contact.

ycombinator.com ( is up via IPv4! ycombinator.com doesn't have an IPv6(AAAA) DNS Entry!



you can try http://news.ycombinator.com.sixxs.org/ until PG gets dualstack

I'm going to try to see if I can get IPv6 working for my linodes.

If you're in Fremont, Newark, or Dallas, it's pretty easy... Just open a ticket (I hear there's actually a button now) and reboot.

There is a button in the dashboard. A script of theirs will alter your MAC address and reboot your machine. When it comes back up, IPv6 is working like a champ.

I just did mine; I got a new IPv6 address and the same IPv4 address.

Well, there went my excuse. I tried to set up a tunnel the other day and couldn't get it to work, but this worked like a champ. I can proudly say my client now owns two of the few IPv6-enabled porn sites on the planet.

CloudFlare handled the DNS like a champ (although I did have to disable and re-enable acceleration for one of the domains to get it to work).

Indeed! That was super easy. DNS was fairly easy too (through godaddy).

:101:ca75: Can I haz? Share your ideas for pretty ipv6

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