22

Are there any convenient public, globally routable test addresses for IPv6?

Similar to how 8.8.8.8 and 8.8.4.4 tend to get used this way for IPv4?

2
  • 12
    It should be noted that pinging an arbitrary service on the Internet that you don't control is a crappy connectivity test.
    – MDMarra
    Jun 6, 2013 at 22:37
  • 8
    It's an excellent positive test, but not really a good negative test.
    – MikeyB
    Jun 7, 2013 at 2:09

3 Answers 3

23

The shortest I've seen is www.sprint.net (2600::).

4
  • Doesn't respond to UDP traceroute. Jun 6, 2013 at 22:55
  • 2
    64 bytes from 2600::: icmp_seq=1 ttl=52 time=207 ms - works
    – Vi.
    Jun 6, 2013 at 22:55
  • 2
    @Michael Lots of things don't respond to UDP traceroute these days. I tend to match the trace to the protocol in question (e.g. nmap --traceroute or tcptraceroute to port 80 for web servers.) Jun 6, 2013 at 23:11
  • @MichaelHampton It does now.
    – kasperd
    Oct 3, 2016 at 17:03
11

Handily enough, 2001:4860:4860::8888 and 2001:4860:4860::8844 are the IPv6 equivalents of 8.8.8.8 and 8.8.4.4!

That's fairly easy to remember.

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  • 2
    Works, but I would prefer them to be like 2001::8888 or even 2001::2001
    – Vi.
    Jun 6, 2013 at 22:37
  • 2
    Strangely enough, these are the IP addresses for Google Public DNS. Jun 6, 2013 at 22:39
  • 6
    Not so strangely… that's where I got them from :)
    – MikeyB
    Jun 7, 2013 at 2:08
  • @Vi. That wouldn't work. 2001::/32 is reserved to Teredo. Both of your suggestions would be using a Teredo server on the IPv4 address 0.0.0.0. But 0.0.0.0 wouldn't be a valid address for a Teredo server.
    – kasperd
    Dec 14, 2014 at 20:11
2

example.com, example.net, and example.org are reserved domains for documentation purposes. However, they also resolve to a running HTTP server and can be opened in browser and this server also response to ping:

# ping -c1 example.net
PING example.net (93.184.216.34): 56 data bytes
...

# ping6 -c1 example.net
PING6(56=40+8+8 bytes) .... --> 2606:2800:220:1:248:1893:25c8:1946
...

The IP addresses are hard to remember, yet the domain names are easy, so if you have DNS...

Alternatively you can use the DNS servers of Quad9:
(great alternative to Google's DNS; better privacy and malware filtering)

# ping 9.9.9.9
# ping6 2620:fe::fe

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