Tag Archives: facebook

IPv6 Day

Today both google and facebook turn on their IPv6 addresses in their DNS servers for one day.

C:>ping www.google.com

Pinging www.l.google.com [2001:4860:800c::93] with 32 bytes of data:
Reply from 2001:4860:800c::93: time=29ms
Reply from 2001:4860:800c::93: time=32ms
Reply from 2001:4860:800c::93: time=68ms
Reply from 2001:4860:800c::93: time=28ms

Ping statistics for 2001:4860:800c::93:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 28ms, Maximum = 68ms, Average = 39ms

C:>ping www.facebook.com

Pinging www.facebook.com [2620:0:1c00:0:face:b00c:0:2] with 32 bytes of data:
Reply from 2620:0:1c00:0:face:b00c:0:2: time=102ms
Reply from 2620:0:1c00:0:face:b00c:0:2: time=125ms
Reply from 2620:0:1c00:0:face:b00c:0:2: time=94ms
Reply from 2620:0:1c00:0:face:b00c:0:2: time=95ms

Ping statistics for 2620:0:1c00:0:face:b00c:0:2:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 94ms, Maximum = 125ms, Average = 104ms

More Information

My ISP timewarner cable does not support native ipv6 yet, so I am still using he tunnelbroker for my home connection. Nonetheless it works pretty well.

Both most recent Tomato Firmware and Openwrt trunk version have built-in 6in4 and 6to4 support.

Update 1: http://test-ipv6.com/

Update 2: http://ipv6-test.com/

Integrate open graph with tumblr

Facebook Like button relies on Open Graph protocol to provide site information such as name, image and title.

With tumblr‘s custom HTML theme, you can integrate open graph protocol in your theme. When user click on a like button, facebook will display your real site name instead of domain itself. If it is a photo post, in activity stream a nice thumbnail will be displayed.

My test page
Facebook with open graph

Here is a tumblr theme fragment which includes required items. I also uploaded images for all post types.


If you use Disqus comments system, you probably already have a facebook app id. You can find out both your app id and user id on facebook insights page. When you click “Insights for your Domain”, you will see a list of your apps and yourself. If you select any of them, the correct meta tag will be displayed.