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NextDNS-over-QUIC in AdGuard is blocking iFrames

I've successfully setup NextDNS-over-QUIC in the AdGuard settings DNS tab. However, when I visit the web page https://abo-digital.tdg.ch/checkout/classic , the subscription info (displayed in an iFrame) is missing and I'm left with a black content page with just the header and the footer displayed.

If I uncheck DNS protection in AdGuard or select AdGuard DNS instead of NextDNS-over-QUIC, then the web page loads normally.

Is there a setting in NextDNS that needs to be set so that iFrames can pass through?

Any suggestions?

8 replies

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    • Will_Tisdale
    • 3 wk ago
    • Reported - view

    DNS blocking doesn’t block iframes. It’s not that granular. It’s probably blocking either the domain that loads in the iframe or the domain of some tracking cookie nonsense that is preventing it from loading.  

      • Oli.1
      • 3 wk ago
      • Reported - view

      Thank you for the clarification, Will. I tried whitelisting tdg.ch, but that didn't work.

      • Oli.1
      • 3 wk ago
      • Reported - view

       It does look like there's some ad tracking going on behind the scene. I don't know if blocking an ad tracker can block a website from loading properly.

      • Will_Tisdale
      • 3 wk ago
      • Reported - view

       Yeah, there's all sorts of tracking on that page. The page loads correctly for me in Chrome and Firefox, but my Safari content blocker stops the subscription frame from opening.

      Which blocklist(s) are you using on NextDNS? I use AdGuard DNS filter and OISD lists.

      • Oli.1
      • 3 wk ago
      • Reported - view

      For NextDNS settings, I'm blocking everything in the Security settings, and in the Privacy settings I only have "Allow Affiliate & Tracking Links" turned off. Neither Firefox, nor Safari, nor Arc (which is Chromium based) display the subscription info. Also, if I disable NextDNS from the menubar, then I still get the same results. White-listing tdg.ch in AdGuard doesn't help either:

    • Will_Tisdale
    • 3 wk ago
    • Reported - view
     said:
    Also, if I disable NextDNS from the menubar, then I still get the same results.

     That kinda suggests the issue is nothing to do with NextDNS then.

      • Oli.1
      • 2 wk ago
      • Reported - view

       When I disable NextDNS and set the DNS server to AdGuard DNS in AdGuard's DNS tab, then the page loads properly and the subscription plans are not blocked. If I change the DNS server to NextDNS-over-QUIC, then the page doesn't load properly. For the mean time, I'll have to stop using NextDNS because there seems to be an incompatibility with AdGuard or QUIC. For what it's worth, I'm attaching below AdGuard logs generated when I visit the page.

      • Oli.1
      • 2 wk ago
      • Reported - view

      Also, if I completely quit AdGuard and keep only NextDNS running, then the page fails to load properly.

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Content aside

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