this post was submitted on 21 Aug 2025
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China cut itself off from the global internet on Wednesday (www.theregister.com)
submitted 1 day ago by technocrit@lemmy.dbzer0.com to c/technology@lemmy.world
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Activist group Great Firewall Report spotted the outage, which it said disrupted all traffic to TCP port 443 – the standard port used for carrying HTTPS traffic.

“Between approximately 00:34 and 01:48 (Beijing Time, UTC+8) on August 20, 2025, the Great Firewall of China (GFW) exhibited anomalous behavior by unconditionally injecting forged TCP RST+ACK packets to disrupt all connections on TCP port 443,” the group wrote in a Wednesday post.

That disruption meant Chinese netizens couldn’t reach most websites hosted outside China, which is inconvenient. The incident also blocked other services that rely on port 443, which could be more problematic because many services need to communicate with servers or sources of information outside China for operational reasons. For example, Apple and Tesla use the port to connect to offshore servers that power some of their basic services.

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[–] binomialchicken@lemmy.blahaj.zone 3 points 3 hours ago

Not HTTPS necessarily, but lots use TLS over 443. If you are sending something like login credentials to an online service, it makes sense for the servers to use what is universally available instead of reinventing the wheel. Also, some games may use a launcher that uses HTTPS if they are web-based in some fashion, or maybe the game will use it for certain kinds of API calls unrelated to actual gameplay.

If you are playing a game that uses a dedicated server (or just isn't a competitive game at all), then TLS usage is probably unlikely, but those games aren't lucrative for the account boosting/currency farming that makes cheating so rampant in China anyway.

Even signing up for some games requires you to create an account on their website first.