Recognise when ISPs hijack NXDOMAIN response

openrightsgroup / blocked-org-uk

Template front-end code, markup, style-sheets, images and other assets for the Censorship Monitoring Project (blocked.org.uk)

https://www.blocked.org.uk/

GNU General Public License v3.0

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Open edjw opened 5 years ago

edjw commented 5 years ago

Apparently, some ISPs hijack NXDOMAIN DNS responses and return the IP address of an ISP-branded search portal.

This results in us incorrectly showing an "OK" status for that domain.

We should recognise when this happens and show an appropriate status