Can you open ff.25u.com:81 from mainland China?
Not sure yet.
There isn't enough recent data to reach a verdict.
2014first tested
3 mo agolast tested
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Other tested URLs on 25u.com
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Frequently asked questions
Is ff.25u.com:81 blocked in mainland China right now?
As of the last test on 2026-04-26, ff.25u.com:81 is not enough data in mainland China, based on GreatFire's live Great Firewall measurements.
http://ff.25u.com:81 · JSON