The "Great Chinese Firewall" has been well documented for its ability to block content from reaching users in China [1][2]. The firewall is implemented using various tools, inspecting traffic for blocked keywords or, in some cases, even scanning images or outright blocking specific sites.
I used my mail server as an example for several reasons:
The pie charts display the top countries before and after making the change. While there was a slight change in the number of Chinese IP addresses (9% instead of 11% of the total number of connections), the difference is not what I would consider significant. So, for now, I call the rumor busted that you can get the Chinese firewall to block traffic to your system by injecting simple keywords.
[1] https://en.wikipedia.org/wiki/Great_Firewall --- |
Johannes 4479 Posts ISC Handler Oct 19th 2021 |
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Oct 19th 2021 7 months ago |
Here's a way that attackers can make the Great Firewall work for them: https://geneva.cs.umd.edu/posts/usenix21-weaponizing-censors/ Expect to see attacks using this vector soon.
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Anonymous |
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Oct 19th 2021 7 months ago |
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