Part of dnsisp.netMixed9 tested URLs
Can you open https://portal.dnsisp.net from mainland China?
Not sure yet.
There isn't enough recent data to reach a verdict.
Same address over HTTP:http://portal.dnsisp.netIntermittent
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.
2016first tested
4 mo agolast tested
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Frequently asked questions
Is https://portal.dnsisp.net blocked in mainland China right now?
As of the last test on 2026-04-09, https://portal.dnsisp.net is not enough data in mainland China, based on GreatFire's live Great Firewall measurements.
https://portal.dnsisp.net · JSON