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Mxtoolbox.com Not Blocked But Does Not Load

I'm a new user to NDNS and I noticed that mxtoolbox.com doesn't load. There is no 404, just a blank screen. I looked into the logs and only 1 tracker domain was observed blocked, so I added it to the allow list. However, this did not solve my issue. If I change my DNS to 1.1.1.2, then I'm able to view the site.

I troubleshoot it further by loading the browser developer console, while still using NDNS, and see that a javascript was not loaded. I added cloudflare.com into the allow list but still does not help the situation. From my Windows PC, while on NDNS, I can't ping cdnjs.cloudflare.com. As soon as I switch to 1.1.1.2, I can ping the domain.

I think my issue is something related to the security features of NDNS but I'm unsure. From the logs, I'm not seeing anything *.cloudflare.com being blocked

1 reply

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    • yesterday
    • Reported - view

    Blank screens are so annoying to debug when the logs say everything is fine. I've had similar weirdness with cdnjs getting caught in security filters before; check if you have "Block Newly Registered Domains" or some of the more aggressive "AI-Driven Threat Detection" toggles on, as those sometimes trip over CDN subdomains for no reason.

    I usually run my templates through unspam.email https://unspam.email/ to check deliverability and it uses mxtoolbox on the backend, so I know the site itself is picky about how its scripts load. Might be worth turning off the security tab features one by one to see which one is the culprit.

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Content aside

  • 8 hrs agoLast active
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