Can you open mb.4pu.com:81 from mainland China?
Not sure yet.
There isn't enough recent data to reach a verdict.
2014first tested
2 mo agolast tested
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Frequently asked questions
Is mb.4pu.com:81 blocked in mainland China right now?
As of the last test on 2026-05-21, mb.4pu.com:81 is not enough data in mainland China, based on GreatFire's live Great Firewall measurements.
http://mb.4pu.com:81 · JSON