Tuesday, July 29, 2014

Dutch ISP Telfort ends its IPv6 offering

Ouch: It's 2014 and Dutch ISP ends its IPv6 service to its customers.

Telfort started an IPv6 pilot in December 2011 (see my blog post) and offered opt-in IPv6 to all its customers as of March 2013 (see my blog post). And all that ended yesterday, July 28, 2014.

As the reason for ending the IPv6 pilot, Telfort says it's moving to a new datacenter.

Telfort offers no clear plans for re-introduction of IPv6: Telfort refers to its dependency on mother company KPN, which does not offer IPv6 to consumer customers.

So: one step back for IPv6 and Telfort.

Sunday, July 13, 2014

Testing IPv6-only on Ubuntu

A nice try, just for fun: how is the Internet behaving with IPv6-only on a Ubuntu system?

Before we start: I think IPv4 will be in use for at least 10 years, together with IPv6. So IPv6-only is just a test.

Pre-condition: your IPv6 must be working. Check with

ping6 -c4 ipv6.google.com

Two steps to remove IPv4:

sudo gedit /etc/resolv.conf
and put this before the existing nameserver entry:

nameserver 2001:4860:4860::8888
nameserver 2001:4860:4860::8844

Then remove your IPv4 address, in my case from wlan0:

sudo ip addr del dev wlan0

You now only have IPv6. (Don't worry: after a network reload, you have your IPv4 back)

Check that IPv4 is not working anymore:

$ ping
connect: Network is unreachable

Check that IPv6 is still working:

ping6 -c4 ipv6.google.com

With your webbrowser, visit (which should all work):

Not working (shame on them!):

You can visit an IPv4-only site like nu.nl via http://www.nu.nl.ipv6.sixxs.org/ . Note that this only work for plain HTTP, not for HTTPS.

If you run

sudo apt-get update && sudo apt-get upgrade

you will get messages like:

Could not resolve 'ppa.launchpad.net'
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?


Back to dual stack IPv4 and IPv6? Just reload your network.