Comment on Randomly getting ECH errors on self-hosted services.

sk@hub.utsukta.org ⁨5⁩ ⁨months⁩ ago

• Darkassassin07@lemmy.ca ⁨5⁩ ⁨months⁩ ago

  Thanks. That seems to be a similar, but slightly different error. I think the below may apply though.

  I believe I’ve tracked down more of my issue, but fixing it is going to be a hassle:

  When cloudflare proxying is enabled, there are 3 DNS records involved; A record with cloudflares ipv4, AAAA record with cloudflares IPV6, and the key to this puzzle: an HTTPS record with cloudflares ech/https config.

  With pihole I can set DNS records for A/AAAA, but I have no way of blocking/setting the HTTPS record so it gets through from cloudflare.

  The A/AAAA records don’t match the HTTPS record, so browsers freak out.

  Once I disabled cloudflares proxying, I no longer get HTTPS records returned and all works as intended.

  I’ll either have to keep cloudflare proxying disabled, or switch pihole out for a more comprehensive DNS solution so I can set/block HTTPS records :(

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  • bobslaede@feddit.dk ⁨5⁩ ⁨months⁩ ago

    I’ve fixed the same issue for me.
    Originally I had this in my Local DNS settings in my Pi-Hole:

    - service1.domain	10.0.0.4
    - service2.domain	10.0.0.4
    - service3.domain	10.0.0.5
    

    I changed that to this:

    - host1.domain		10.0.0.4
    - host2.domain		10.0.0.4
    

    And then I added CNAME Records to the services like this:

    - service1.domain	host1.domain
    - service2.domain	host1.domain
    - service3.domain	host2.domain
    

    This fixed the whole thing for me :)

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    • Darkassassin07@lemmy.ca ⁨5⁩ ⁨months⁩ ago

      @bobslaede@feddit.dk I could kiss you. You’ve been invaluable my friend, thank you!

      Just gave this a test: CNAME ombi.domain -> local.domain with cloudflares proxy re-enabled.

      Now the HTTPS, A, and AAAA requests all receive the CNAME response and browsers are happy. I didn’t even have to modify ngnix to recognize local.domain like I thought I might.

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      • bobslaede@feddit.dk ⁨5⁩ ⁨months⁩ ago

        Awesome! I’m glad that it worked. It took me a while to figure out, when it happened to me. Glad that I could make your life easier :)

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