China to block SD-WAN and VPN traffic by Jan. 11

A new Chinese policy going into effect next week, will have profound impact on businesses relying on Internet VPN or SD-WAN access within China.

According to a notice from China Telecom obtained by SD-WAN Experts, the Chinese Government will require commercial Chinese ISPs to block TCP ports 80, 8080, and 443 by January 11, 2018. Port 80 is of course the TCP port commonly used for carrying HTTP traffic; 8080 and 443 are used for carrying HTTPS traffic. Commercial ISP customers interested in maintaining access to those ports must register or apply to re-open the port through their local ISP.  

The news, first reported by Bloomberg July, was expected to be implemented by February, 2018. This is the first time a specific date has been provided for the action.

Millions of Internet users relied on virtual private networks (VPNs) to circumvent the Chinese censorship system, dubbed the Great Firewall of China. In the past, VPNs have worked intermittently but were invariably blocked, forcing users to jump to another VPN. The new regulations will block VPN access to unregistered services.

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