Can you open u2.duckdns.org/go/5v from mainland China?
No.
It's blocked — 100% of the last 2 conclusive tests failed in mainland China.
Access u2.duckdns.org/go/5v with GreatFireVPN →2015first tested
2/2blocked · last 90 days
2 mo agolast tested
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Frequently asked questions
Is u2.duckdns.org/go/5v blocked in mainland China right now?
As of the last test on 2026-05-16, u2.duckdns.org/go/5v is 100% blocked in mainland China, based on GreatFire's live Great Firewall measurements.
Why is u2.duckdns.org/go/5v blocked in mainland China?
It's blocked — 100% of the last 2 conclusive tests failed in mainland China.
Since when has u2.duckdns.org/go/5v been blocked?
GreatFire has recorded interference with u2.duckdns.org/go/5v from mainland China since 2015-07-27.
How can I access u2.duckdns.org/go/5v from mainland China?
You need a circumvention tool such as a VPN. GreatFireVPN, built by GreatFire, is designed to bypass the Great Firewall and reach sites like u2.duckdns.org/go/5v.
http://u2.duckdns.org/go/5v · JSON