Can you open https://ctyjhu.org/online/courseaccess.cfm?course=AL2 from mainland China?
Sometimes.
No recent testsVerdict from 2026-02-18 · 6 mo ago
As of the last test on 2026-02-18 — 6 mo ago — it was partly disrupted in mainland China. We haven't tested it since, so this may have changed.
Access ctyjhu.org with GreatFireVPN →Frequently asked questions
Is https://ctyjhu.org/online/courseaccess.cfm?course=AL2 blocked in mainland China right now?
We haven't tested https://ctyjhu.org/online/courseaccess.cfm?course=AL2 in the last 90 days. As of the last test on 2026-02-18 (6 mo ago), it was partly disrupted in mainland China. Use the Test now button on this page for a fresh measurement.
Why is https://ctyjhu.org/online/courseaccess.cfm?course=AL2 blocked in mainland China?
As of the last test on 2026-02-18 — 6 mo ago — it was partly disrupted in mainland China. We haven't tested it since, so this may have changed.
Since when has https://ctyjhu.org/online/courseaccess.cfm?course=AL2 been blocked?
GreatFire has recorded interference with https://ctyjhu.org/online/courseaccess.cfm?course=AL2 from mainland China since 2017-01-30.
How can I access https://ctyjhu.org/online/courseaccess.cfm?course=AL2 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 ctyjhu.org.
https://ctyjhu.org/online/courseaccess.cfm?course=AL2 · JSON