I have used SIP phones in China and I can tell you that some of the firewalls are a lot more advanced than just blocking applications. I was able to place some types of calls via my USA DDI, while others were redirected to a local chinese gateway. Essentially that means that ALGs were inspecting the SIP invite messages ... quite interesting ... Turning on the SSL VPN made that problem go away ... --truman On 18/01/2006, at 5:02 PM, yuri wrote:
On 18/01/06, Gary T. Benner wrote:
If anyone has had experience in this area, are there issues relating to the Chinese Authorities intercepting such communications, or would it be just to do with the connection?
Yes. It's called the Great Firewall of China. You'll find news on it on Google (unless you try to search for it from within China). Chinese authorities don't like their subjects to access dangerous content, like discussions on evil concepts like "Democracy" or "Religious Freedom".
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