this post was submitted on 22 Nov 2023
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How to use docker selfhosted DNS server on phone over Tailscale? (alien.top)
submitted 10 months ago by BunkerMoewe@alien.top to c/main@selfhosted.forum
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Hello guys,

I'm trying to get Domain Names to work inside my Tailnet. My setup is a Tailscale Docker container running inside a docker network. The DNS server (dnsmasq) is also running inside this docker network. Tailscale uses --advertise-routes=172.18.0.0/16 to expose the docker network and so the DNS server is theoreticly reachable over the Tailnet with the IP 172.18.0.x, but I just cant figure out, how to tell my phone to use this as its DNS server.

I would also like to still have another 'real' DNS server configured for my phone, so I dont have to use my selfhosted DNS server for every DNS lookup. From what I could gather already, Private DNS on android is an option, that might work, but when I tried it, I couldnt enter my DNS servers IP address and then, from how I understand it, this is my only DNS server configured for the phone.

I hope I could describe my problem as good as possible and someone is able to help me out. :)

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[–] mabernu@alien.top 1 points 10 months ago

I solved that setting up as "exit node" into the phone app a node into tailnet with the dns server configured. I mean, wherever node inside of your tailnet should working against your dns server and you can use it like "exit node".