Can you open https://public.dns.iij.jp from mainland China?
No.
No recent testsVerdict from 2026-03-17 · 5 mo ago
As of the last test on 2026-03-17 — 5 mo ago — it was blocked in mainland China. We haven't tested it since, so this may have changed.
The two are filtered by different means — an unencrypted request by the address and keywords it carries in the clear, an encrypted one by the server name in its TLS handshake — so one working while the other does not is normal.
Frequently asked questions
Is https://public.dns.iij.jp blocked in mainland China right now?
We haven't tested https://public.dns.iij.jp in the last 90 days. As of the last test on 2026-03-17 (5 mo ago), it was blocked in mainland China. Use the Test now button on this page for a fresh measurement.
Why is https://public.dns.iij.jp blocked in mainland China?
As of the last test on 2026-03-17 — 5 mo ago — it was blocked in mainland China. We haven't tested it since, so this may have changed.
Since when has https://public.dns.iij.jp been blocked?
GreatFire has recorded interference with https://public.dns.iij.jp from mainland China since 2021-03-05.
How can I access https://public.dns.iij.jp 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 public.dns.iij.jp.
https://public.dns.iij.jp · JSON