Utility Computing dot China » blocked

Flickr Blocked in China Too!

richard — Tue, 07 Jul 2009 14:40:20 +0000

There goes the flickr image servers as well. The fall out from Xinjiang continues.

Flickr works still for chat and forums – but no images.

Facebook Blocked in China

richard — Tue, 07 Jul 2009 11:46:32 +0000

Facebook blocked in China.

This time it is not even the “Connection Reset” usual suspect. Nothing is happening so I am guessing DNS poisoning.

Going to run some tests from different servers across China in different cities and different networks and also do some DNS zone queries to see what is up. 20 mins and counting…….

UPDATE: Can confirm that Shanghai and Nanjing also not working. Also not a “Connection Reset” error so this is not happening due to the automated and distributed filter system. This must be happening at the international gateway as packets are just being dropped as opposed to having TCP connection resets inserted into the streams.

30 mins and counting…

OK – GPRS works for Twitter… IDC doesn’t on CNC – does on China Telecom – office doesn’t

richard — Mon, 06 Jul 2009 08:16:42 +0000

This makes me laugh when overseas China tech “experts” say the “Great Firewall”. There is NO FIREWALL. There is a VERY DE COUPLED and de centralised filtering system that often gives different results on different networks and at different times.

So the office on CNC does not – so this is a CNC problem…

This is why I always tell clients, don’t cheap out on the cheapest hosting – always host in an IDC that is dual homed to both CNC and CT and will pass traffic between the two networks (and others) because Chinese network providers charge each other to peer traffic – as such it is often slow or limited.

Another China day. Back to work.

UPDATE: Fully blocked now…seems at the gateway, tests show dropped packets and not the usual local area filtering “TCP Reset” style of error.

Twitter blocked in China

richard — Mon, 06 Jul 2009 07:40:51 +0000

Twitter blocked in China? I can tweet via blog-but my twitter.com page just got the infamous “connection reset” msg..lets see if it passes?

It has been 30 mins now and it has not come back which usually happens after 1-2 mins if it is a temp thing with the automatic sniffing…. 30 mins sounds kind of “official” to me…

Something has been up today though – the transfer speeds between our Hong Kong and Beijing IDC’s as well as Hong Kong to our Nanjing IDC has been VERY slow and spotty. In that the speed fluctuates a lot. Something that backbone fibre should not do.