seby.io
Mixed
Results vary across seby.io: of 4 URLs tested, 2 are blocked, 1 is disrupted some of the time and 1 has no conclusive recent result. The site itself, https://doh.seby.io, is blocked. The Great Firewall breaks its TLS handshake. 76 tests have been run under this domain since 2020-06-07, the most recent on 2026-06-13.
Pages and subdomains (4)
https://doh.seby.ioas of 2026Blockedhttps://doh-2.seby.ioas of 2026Blockedhttps://doh.seby.io:8443Not enough datahttps://doh.seby.io/dns-queryIntermittentAbout seby.io and the Great Firewall
Results vary across seby.io: of 4 URLs tested, 2 are blocked, 1 is disrupted some of the time and 1 has no conclusive recent result. The site itself, https://doh.seby.io, is blocked. The Great Firewall breaks its TLS handshake. 76 tests have been run under this domain since 2020-06-07, the most recent on 2026-06-13.
A VPN or another circumvention tool routes the request outside mainland China, past the filtering that blocks seby.io. 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.