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How DNS are set on android? (europe.pub)
submitted 7 months ago by to c/android@lemmy.world
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I'm using e/os and I want to be sure that, when connected to my local network, my local dns server is used, however, no matter what I do, my phone always use google's one. Is there any way to fix this?

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[–] 1 point 7 months ago (1 child)

I believe that using ipleak.net [...] will not show you the internal DNS server you are using within your local network.

You're right. It won't show internal one. As I mentioned I don't have internal DNS server set up, so I only used it to check whether changing DNS in wifi settings will actually take effect, and it did. That's why I believe setting it to internal one should take effect as well.

I may try to setup custom DNS in my local network when I have some free time.

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  • [–] 1 point 7 months ago

    Ok, I did test it.

    1. I set up DNS server on my PC using Technitium.
    2. I add zone a.local and add record with device A's IP.
    3. I add zone b.local and add record with device B's IP.
    4. On device A (Android 11) I go to Setting » WiFi and set DNS to PC's IP.
    5. On device B (Android 13) I go to Settings » WiFi and:
      • Change IP to static
      • Change both DNS1 and DNS2 to PC's IP.
    6. I ran some file served over http on both devices.
    7. I visit http://a.local/ on device B ❯ A's Files accessed
    8. I visit http://b.local/ on device A ❯ B's Files accessed

    Everything works.

    Note:

    • it took DNS server about 1min to add the records (idk why).
    • It seems devices caches NAME_NOT_RELOVED so if it failed it will be cached as such for at least a few minutes.
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