Windows 10: Windows bypasses DNS rules on Router

Discus and support Windows bypasses DNS rules on Router in Windows 10 Network and Sharing to solve the problem; I have a small network that is configured, on Linksys router, to use an internal IP for DNS requests.Dnsmasq running on Raspberry PI. The requests are... Discussion in 'Windows 10 Network and Sharing' started by Roland Khadige, Mar 21, 2023.

  1. ROLAND KHADIGE
    Roland Khadige Win User

    Windows bypasses DNS rules on Router


    I have a small network that is configured, on Linksys router, to use an internal IP for DNS requests.Dnsmasq running on Raspberry PI. The requests are then redirected through a personal tunnel to a personal server running the DNS service.Everything is working great and I have no DNS leak at all even with a stress test.The Raspberry Pi went down last week. I was supposed to be without DNS, however, ONLY Windows OS managed to send the DNS requests to the ISP DNS server either using the browsers or via command line. Linux based and Android did not go through.This is a major issue just for the pri

    :)
     
    Roland Khadige, Mar 21, 2023
    #1
  2. HYBRID_THEORY
    Hybrid_theory Win User

    DNS problems with router

    A couple suggestions I have for you:

    Update the firmware on the router. Maybe it's getting into a badstate, and a firmware update might fix it. Or if you're comfortable with it, install a custom firmware like dd-wrt. Just make sure its supported on your router first.

    Change your DNS to: 8.8.8.8, 4.2.2.1. Might help.

    If none of these work, maybe statically set your DNS on your PS3/PC to the IPs you listed, taking the router out of the lookup procedure.

    Last option, is look for a new router.
     
    Hybrid_theory, Mar 21, 2023
    #2
  3. RIZINGHIGHER
    RizingHigher Win User
    firewall rules to stop circumventing router's DNS configuration

    I hope that someone here can help me. My router is configured to point to specific DNS servers and I want to prevent someone from circumventing the router by changing the PC's network adapter properties with other DNS servers. Using Windows Defender on
    a Windows 10 PC, what firewall rules should I enable?

    Thanks for any help with this.
     
    RizingHigher, Mar 21, 2023
    #3
  4. CEREBERUS
    cereberus Win User

    Windows bypasses DNS rules on Router

    DNS Priority (Windows 10 vs Router/Modem)

    As a rule, DNS set in Windows (with static IP etc) override a router DNS. However, some routers intercept the Windows DNS making the router DNS take priority. This is pretty rare though.

    Most routers in UK lock down DNS on router but do allow you to use a Windows DNS instead. I use a chromecast dongle and you have to bypass router DNS to cast videos from a VPN. I got round this by having a second non ISP supplied router connected LAN/LAN and set that routers DNS accordingly. That way I could easily flip flop between DNS needed for VPN and DNS needed for normal internet traffic simply by connecting to appropriate router via wifi.

    If router does intercept DNS, then really only option is to use a genric non ISP router.
     
    cereberus, Mar 21, 2023
    #4
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Windows bypasses DNS rules on Router

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