DNS Block Page Not Working

[chadb704]

Additional information

DNS policies

What is the error message?

NET:ERR_CERT_AUTHORITY_INVALID

What is the issue you’re encountering

DNS blocking works, but it displays a certificate error instead of the block page

What steps have you taken to resolve the issue?

I have installed the Warp client on the test system (running Raspberry Pi OS). Categories I want blocked are inaccessible, but they display a certificate error instead of the block page.

I have followed the instructions at the link below to manually install the root certificate for Debian-based distributions, as well as installed it in both Chromium and Firefox, but the certificate error persists and no block page is displayed in both browsers. What am I missing?

Install certificate manually · Cloudflare Zero Trust docs

[fritex]

@chadb704

DNS blocking works, but it displays a certificate error instead of the block page

Maybe your default Zero Trust team certificate needs to be updated/renewed:

User-side certificates · Cloudflare Zero Trust docs

In case of some error, for troubleshooting & see a workaround on this topic here:

Cloudflare default certificate expiring, cannot activate new certificate

@fritex Thank you. I solved the issue. For future suffers, especially those who see this issue first time, I’ll briefly explain steps: Get the warning that my certification will expire soon. Create a new certificate (I used ‘Generate certificate’ button). Open the new cert by clicking. The detail panel will show up on the right-side. In the panel, you need to click the button highlighted in the picture below. If so, the case closed. !(upload://inLerYBLl6RO85gAzVRJEmmOYJS.png If not, go to Set…