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Using the internet in the People's Republic of China

Our man reports from inside the Great Firewall

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China makes no secret of its desire, and ability, to control internet access, but even at a glance it's clear that the Great Firewall Of China leaks like the proverbial sieve.

We had the chance to try our hand at breaching that wall on a recent trip to visit Huawei in Shenzhen. Our hosts kindly supplied us with China Mobile SIMs for data access so we could see the internet as the Chinese see it, and we managed to test out wi-fi connectivity at a local hotel with similar results - only the hotel wi-fi didn't kick us off entirely for asking the wrong questions.

Cisco provides the racks of servers used by the Chinese government to monitor, and block, access to specific services and information. Unsurprisingly the system is easy for the technically literate to circumnavigate, if we'd been using a UK SIM then our traffic would be routed via the UK operator and thus past the firewall. Even without paying ruinous roaming rates it's not difficult to do most things, though the blocks still crop up often enough to irritate if one is used to unfettered internet access.

Facebook missing in action

Social networking? Ah, you mean QQ

The blocking is almost entirely HTTP related – specific websites are disallowed on the basis of their URL. That includes services such as Facebook and Twitter, but only the websites; the westerner travelling in China will have no problem using app clients out widgets over hotel Wi-Fi and cellular, though the Twitter (SMS) short code won't forward.

The same rules apply to email. Encrypted IMAP works fine, and Gmail continues to synchronise with it's Android (our similar) client, but try accessing any part of Gmail, or any GMail-hosted service (such as the El Reg mailboxes), on a browser and the Chocolate Factory's email service is permanently off line.

Attempting to load any of the prohibited web sites results in a 'site not found' error, just as if one had mistyped the address or Twitter.com just didn't exist. Locals were aware of the blocks, but didn't consider it remarkable and simply pointed out that all countries block content that they find socially unacceptable, it's just a matter of where the lines are drawn.

More interesting were the results of a contentious search. Google's URL forwards to Hong Kong from China, and mostly works, but search for "Tiananmen Square" and suddenly the cellular connection drops out entirely and has to be reconnected, not a browser error but a disconnected data session. Spell "tanaminm" badly enough and the firewall will miss it, but Google will correct the spelling and return the search results. That's not very useful, as clicking on any of the pertinent ones will result in the "site not found" error popping up again.

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