dnsisp.net
Mixed
Results vary across dnsisp.net: of 9 URLs tested, 1 is blocked, 2 are disrupted some of the time and 6 have no conclusive recent result. The Great Firewall resets the connection. 266 tests have been run under this domain since 2016-08-04, the most recent on 2026-08-18.
The site itself
https://dnsisp.netNot enough dataPages and subdomains (8)
http://ss.dnsisp.netUnresolvablehttp://portal.dnsisp.netIntermittenthttps://portal.dnsisp.netNot enough datahttps://monitor.dnsisp.netNot enough datahttp://fir3beast.dnsisp.netIntermittenthttps://fir3beast.dnsisp.netNot enough datahttp://ct.dnsisp.net/aff.php?aff=11as of 2026Blockedhttps://fir3beast.dnsisp.net/aff.php?aff=11Not enough dataAbout dnsisp.net and the Great Firewall
Results vary across dnsisp.net: of 9 URLs tested, 1 is blocked, 2 are disrupted some of the time and 6 have no conclusive recent result. The Great Firewall resets the connection. 266 tests have been run under this domain since 2016-08-04, the most recent on 2026-08-18.
A VPN or another circumvention tool routes the request outside mainland China, past the filtering that blocks dnsisp.net. GreatFire runs GreatFire VPN; the Analyzer also tests the domains of many VPN and proxy providers, so you can check whether one is reachable before relying on it.
Elsewhere on the site
Each URL's status is its verdict over the last 90 days, the same one its own page headlines.